2023 Hyundai Ioniq 5

The iccu failed.

The contact owns a 2023 hyundai ioniq 5. the contact stated while driving 45 mph, the message "electrical system failure - please stop the vehicle" was displayed and the vehicle unintendedly decelerated and failed to exceed 25 mph. the contact pulled into a parking lot and the vehicle was towed to a dealer where the vehicle was diagnosed, and the contact was informed that the integrated charging control unit (iccu) had failed and needed to be replaced. the vehicle was not repaired. the manufacturer was notified of the failure. the approximate failure mileage was 53,131.

Iccu failure after the recall was updated.

Component called iccu fails. car loses power, cannot be driven, cannot be charged. can easily leave you stranded. research shows this is widespread issue. i spoke with 2 dealerships, each has over 1 dozen cars in this lot that have been brought to the service department with the iccu failure issue and cannot be driven.

- the iccu assembly failed while i was driving on the highway. - the iccu failed even after i had the car taken in due to a recall on the iccu unit. in other words, the repair that they suggested i do to the iccu did not work, which means i was driving a dangerous vehicle. - when the iccu failed, the car slowed down to 25 miles an hours and then a crawl while i was driving on the highway with my family. i was lucky to not get into an accident. - i have taken the car into the dealer and they have told me it will take up to two months to get the iccu fully replaced because the unit in my car failed even though i had it repaired during the recall. - i have contacted hyndai requesting they buy back my car because it is unsafe to drive. they have not responded. - you need to get this sorted out asap. the recall repair on the iccu did not work and there are other cars that are at risk of failing.

While reversing slowly, i heard a "pop" noise (sounded like balloon popping) from the rear of the vehicle, and within 15 seconds later, a "check electric vehicle system" warning appeared on the dash alongside the check engine light. about 5 minutes later, i received another warning that said "stop vehicle and check power supply" and noticed the car was losing power. was able to get it home to get it towed, but this was within 2 months after receiving the iccu recall for this vehicle, and it seems the iccu has failed again.

4/13/25 - check electrical system appears onscreen. vehicle the goes in "turtle mode", not allowing it to accelerate over 20 mph. car then shuts down and will not go into gear. i have done all service recalls as required by the manufacturer. very unsafe and disappointed that hyundai has not resolved this issue. all they do is update the software, they never address the actual issue. diagnostic not scheduled for (2) days. now i'm without a vehicle this week as they have a waiting list for loaners.

The electrical system and the car became undrivable while driving as it lost power

In late january 2025 i took my ioniq 5 (an ev) to the dealer for service under a recall. the service called for a software update in regard to the integrated charging control unit (iccu). the next time i attempted to charge the car charging failed. the dealer subsequently determined that the iccu had failed. the car has been in the shop for two months and counting, as hyundai is unable to supply the parts necessary for the repair. this happened without warning, although there are many other reports of similar incidents.

While driving in the one pedal driving mode (“ipedal”), it is possible to rapidly slow the vehicle while keeping the accelerator pedal slightly depressed, which is the expected result for this regenerative braking mode. while rapidly decelerating in this mode, however, the brake lights do not illuminate while the accelerator pedal is slightly depressed. even though regenerative braking is active and the car is rapidly decelerating, there is no brake light illumination. the brake lights only turn on if the accelerator pedal is not pressed at all, which during typical one-pedal driving only occurs at the very end when coming to a complete stop, or when stopping suddenly during a cut-in or at a light. this is a serious safety concern because the vehicle will decelerate very quickly with no visual warning lights to other drivers behind the vehicle. i have noticed that this issue has been reported by other drivers online, but i have not yet taken the vehicle to be inspected by the dealer. there is no indication of failure on the dashboard.

There is no rear windshield wiper and the design of the car causes much dirt/gunk to build up heavily obscuring visibility there are times where i'm driving at night (esp. when it's raining) where i can barely make out the cars/objects behind me. it is very dangerous

Hater does not push out any hot or heated air.

I've owned this car for 4 months now. we own 2 electric cars, 1 ioniq 5 and 1 fiat 500e. we have a level 2 charger in the garage. a month ago i noticed the ioniq stopped charging overnight. when i tried the next day, it charged for about 30 minutes, then i would get a msg on my phone saying charging had stopped. i can remotely start the charging again, but then it would stop every 10 or 15 minutes. this is still happening. the fiat has no issues charging, leaving me to believe it's not the charger that is the problem. i've even reduced the charge to the middle level but it hasn't helped. i will be taking this into hyundai this month for them to see what's wrong.

When using i-pedal (one-pedal driving) mode in this vehicle, it can decelerate at a very fast rate but does not illuminate the brake lights unless the driver’s foot is completely off the pedal. for example, i can be driving 60mph and decelerate to ~2mph as quickly as other drivers coming to a complete stop, but my brake lights will not illuminate until my foot is **completely** removed from the pedal. this is contradictory to the way one-pedal driving works, since coming to a smooth and slow stop requires that you slowly lift off the accelerator pedal, during which the brake lights do not illuminate because your foot is still pressing the pedal (albeit less and less as you come closer to the stop).

The contact owns a 2023 hyundai ioniq 5. the contact stated that the vehicle failed to charge at 120 or 240 volts. the charging unsuccessful alert was displayed. the contact stated that the vehicle only charged on a dc fast charger. the vehicle was taken to the dealer where it was diagnosed that the iccu (integrated charging control unit) that allowed both high-voltage and secondary batteries in vehicles to be charged had failed. the vehicle was not repaired. the manufacturer was notified of the failure. the failure mileage was approximately 500.

The ioniq 5 offers a multi-level regenerative braking system, which slows the car down to varying degrees when letting off the accelerator pedal. while these systems work well to increase efficiency, the behaviour of the brake lights while in use is concerning. very often the car is slowing considerably, enough to be akin to light braking, but the brake lights do not activate. this can be full let off the accelerator pedal and slowing with not brakes, or with a partial lift (especially on higher regen levels), where the vehicle is obviously slowing but the brake lights do not activate. this has been talked about on various forums and some review videos, and i expect this is not the first complaint placed about this issue. so far it has not caused a problem with my vehicle, but i have had to alter my driving habits to account for this, and it at times renders some of the vehicles technology dangerous to use, despite that technology being added to the car as a benefit to the driver under most conditions.

12v battery does not seem to be charging. after 2 days of not being driven, 12v battery status is too low to start the car. jump starting works but same think occurs after couple of days of not driven.

Brake lights do not lit while decelerating using regen braking system without letting foot off of accelerator. there is no indication for vehicle behind mine to decelerate which can result in collision

Brake lights do not come on when decelerating in i-pedal mode and level 3 regen brake modes, perhaps more. the car should instead generously apply brake lights by default anytime deceleration occurs via regen braking.

When using most of the regenerative braking levels, including the one-pedal driving mode named “i-pedal,” the brake lights will not illuminate until the drivers foot is fully off the gas pedal, or manually applying the brakes. this can create a dangerous, life threatening scenario leaving surrounding drivers unaware the vehicle is slowing. this has not been reproduced by the automaker not inspected by them, police, insurance, etc but has been verified on video. no warning lamps appeared.

The regenerative braking will not turn on brake lights unless the accelerator is fully unpressed. in the more aggressive modes (l3 and i-pedal), the stopping power is very strong. without brake lights, it catches other motorists off guard and they nearly hit me. for reference, i-pedal mode is able to bring the car to a full stop on its own. this is dangerous. the brake lights need to come on depending on the rate of deceleration, not the accelerator pedal state. this can happen at any speed, but becomes more dangerous at highway speeds.

When using the most aggressive braking energy recovery mode in the hyundai ioniq 5 (i-pedal), the brake lights do not illuminate despite the aggressive nature of the braking provided by this mode. this mode brings the car to a full and complete stop and is very similar to commanded braking via the brake pedal. when using the l1-l3 braking energy recovery modes, the deceleration experienced by the car is more or less mild enough that it would be similar to a downshift in a manual transmission car. but the brake lights only illuminate if your foot is fully off the accelerator pedal. i am not aware of the regulations or sae guidance to know if this is consistent with best practice, but it could be better with the brake light coming on once a certain deceleration (x m/s2) is reached. it is my opinion that a software change in the car's ecu could effect a fix for this. a mandatory recall would force the issue with hyundai to actually do something about it. note that kia and genesis share the same basic ev platform and may share the same logic fault in brake light activation. here is a youtube video that discusses the issue in a fair level of detail - https://www.youtube.com/watch?v=u0yw7x9u5tq

The ioniq 5 when using level 2 regen, level 3 regen, and i-pedal (one pedal driving), does not turn on the break light when decelerating, even if coming to a full stop unless the driver removes their foot completely from the pedal or hits the break pedal. these driving modes allow the driver to perform regenerative breaking almost to a complete stop without turning on the break lights and warning other drivers behind you. with i-pedal specifically, the driver can 100% perform all stop and go traffic maneuvers without using the break and never have the break lights activate. this appears to be the default behavior of all ioniq 5 vehicles and is controlled via software. the vehicle does not appear to measure rate of deceleration so even if the driver were to decelerate rapidly, the brakes would not activate. this has been extensively demonstrated on youtube and the best video example of this problem can be found here: https://www.youtube.com/watch?v=u0yw7x9u5tq

The brakes lights do not illuminate when slowing down using regen braking. this has cause cars to stop very close to rear-ending me. this video explains this issue in great detail https://www.youtube.com/watch?v=u0yw7x9u5tq

When my car is configured to one pedal driving mode (ipedal), the brake lights only illuminate when the accelerator pedal is fully released. this means the car may decelerate rapidly (up to 0.25g or 2.5m/s^2 according to a report) under regenerative braking, while the brake lights remain off. i believe this is a safety hazard that can increase the chances of rear-end accidents.

The ioniq 5 has a braking system that does not engage the brake lights on deceleration when in certain regenerative braking settings. this is dangerous as the car will quickly decelerate and not warn drivers behind you potentially causing a crash because they are unaware the ioniq is stopping quickly. please have hyundai address the issue for recall.

Brake lights do not come on when the car is in regenerative braking or driving mode and the driver is touching the gas pedal. drivers following the car are not aware the car is actually braking not coasting. this is causing a rearending hazard. mfr needs to correct issues so brake lights come on when car is in regenerative braking mode and the car is deaccellerating regardless of gas pedal activity

12v battery died within 6 days and needed to be jumped. another 4 days and the 12v will not hold a charge at all. this is a new 2023 ioniq 5 limited awd. odo on the lot was 13 miles. odo at 10 days was around 280. waiting to hear from hyundai, but dealer confirmed 12v is bad. currently unknown if iccu is also faulty.

What component or system failed or malfunctioned: rear electric motor. specifically the "engine oil pump" that is used to cool the rear motor. the pump does not respond to mcu commands and does not cool the motor. this causes the motor to overheat after about an hour of highway driving causing the motor to provide very limited power. how was your safety or the safety of others put at risk: when the above happens the car experiences a delayed throttle, and very little power to accelerate. this occurs while traveling on a highway where you may need to pass, but no longer have the power to do so safely. has the problem been reproduced or confirmed by a dealer or independent service center: dealer took the car in and did not properly attempt to reproduce the issue. then stated that if the car does not produce a dtc then there is no issue. the dealer has since refused to accept the car again. this has been reproduced here: https://www.ioniqforum.com/threads/rear-motor-not-operating-45-min-after-charge.46007/ has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others: no, i have just started the process of reaching out to the manufacture, and if this fails i will be using my states lemon laws. were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear: no this issue does not appear to throw any codes, lights, or messages. the dash shows the rear engine producing no power, and the throttle will only show half when pressed to the floor.

The charging port on the electric vehicle appears to have poor cooling as the port frequently overheats when connected to any level 2 charger that is within the vehicle's approved specs. i've measured it going as high as 200 degrees f before the car stops accepting a charge, and even after that the port will remain piping hot until it is physically unplugged. this is quite dangerous as i mostly charge at night and am asleep when it happens in my garage. a quick search online shows that hundreds of ioniq5 owners are having the same issue. hyundai released a technical service bulletin(23-ev-003h), so i can take it into a dealer for a software update that will fix the issue. however, that update only succeeds in restricting how much current the car will accept in order to keep the temperature within safe levels. this means that the car i purchased cannot function safely as advertised.

The charging system in the 2023 ioniq 5 has multiple issues with connectivity and charging above a certain threshold. when charging at home using an electrician certified install by merit and a county approved installation and emporia evse 48a charger, the car prompts with a message that reads "electric vehicle charge alarm was processed. your vehicle is not charging because of a connection failure. possible reasons include: blackout, payment incompletion, charging stop button enabled." this has only recently started happening with the temperature in the closed garage reaching above 80f. the only way to rectify is to charge below 40a and this same issue is being reported by other ioniq 5 owners via online forums as well. as it relates to dc fast charging at public infrastructure, the ioniq 5 has a reliability problem with connectivity to the ccs1 ports that are used with electrify america stations. the common denominator appears to be the charging port of the ioniq 5.

Ev goes into power limited mode when on interstate when going ~50 miles while driving 70mph or more. happened each of my 3 times on interstate of about that distance. first time was sat 4/29 while in eco mode with 70% battery and 82°f outside, 1 hr drive 50+ miles. second time was in normal mode friday 5/12, 55% battery 72°f outside 1 hr drive 50+ miles. third time was in normal mode and it happened after 42 miles. i scheduled a service after the first incident but they were only able to take it on 5/31. when this happens you lose ability to accelerate and have to coast to the side of road and let it sit for 10+ minutes to clear and then can resume, i would take surface roads after it occurred. impacts safety for self and others, as it drastically slows without brake lights causing a high chance of being rear ended. the last incident was close to it. as it was getting worse i stopped driving on interstate with it. car has been at the dealership's service department since 5/31. they were able to easily reproduce once they finally got to it. they diagnosed a bit and then consulted design engineers. diagnosed on and off for a couple weeks and have finally decided to replace the drive motor. part received friday 6/16, to be installed tomorrow 6/20. we'll see if that addresses.

While driving on the interstate my 2023 ioniq 5 sel rwd experienced a failure with the front radar system stating that it was blocked. in reality there was nothing physically blocking the system which was verified on multiple pullovers to check the front of the vehicle. this caused the critical forward safety functions, hda system, lane change assist functions, regeneration system, and smart cruise control to all be disabled. the car is available for inspection upon request and i have video of the car displaying the fault messages during the trip as it happened on multiple occasions.

We purchased our 2023 ioniq5 approximately 7 months ago. we saw an article in the newspaper about the 2022 ioniq losing power while driving. that has happened to us 3 times in the last several months so it is not strictly the 2022 model. one time was particularly scary as i was entering a busy freeway the car lost power and as much as i pushed on the pedal i could not go more than 20mph. this happened for about 15-30 seconds then finally accelerated. my husband said he has experienced the same problem with this vehicle on 3 different occasions. thank you.

2023 hyundai ioniq 5 (sel, awd) has bad iccu (intergrated charging control unit). will only charge at dc chargers reliably, level 2 or level 1 chargers will only work intermittently. has been in the shop 2 weeks with no estimated repair date as the iccu is on backorder. this issue is affecting a lot of hyundai/kia/genesis customers who's vehicles share the same platform. the dealer won't even say where i am in line to receive the iccu vs. everyone else in north america. this is really unacceptable for a car i paid almost $60,000 for.

Vehicle is supposed to be able to charge at 48a on an ac charger but it does not do this during the months when ambient temperatures are above freezing. poorly designed thermal management by the manufacturer causes charging to stop when the local temperature at the charge port door exceeds the threshold. the only way i can charge this car at home outside of the winter months is to lower the evse amperage to 32a which results in the car taking longer to fully charge than it’s supposed to. this car is supposed to be able to ac charge at 11.5 kw with 48a but it simply cannot do that most of the time. this issue is widely reported on the ioniq 5 forums and is not isolated to me.

Twice this week while charging my ionic 5 the charging stops before it is completely charged to the set point. once the set point was at 80% and once at 100%. both times the charging stopped and i received the message below. none of the reasons listed in message was a cause of the stopping. i have called my dealer and they are checking w/service dept to see if i need a software update. i am waiting to hear back but there is obviously something wrong with the rate of charge. i am using a jukebox home charger.

When ac charging my car, it quickly overheats and disables charging. i've measured the temperatures at 239°f using obd reader. the only way to continue charging is to reduce charge amperage. if it is reduced to 32 amps the temperature seems to stabilize before reaching the 240° emergency cut off.

When starting vehicle, presents a warning message in instrument panel of "check electric vehicle system". the stated description indicates: "this warning message is displayed when there is a problem with the electric vehicle control system. refrain from driving when the warning message is displayed." this could be an issue with the battery system, or steering system that puts others in danger due to the unpredictable nature of the error. the hyundai app that reports vehicle statuses does not show any error or diagnostic codes.

Cruise control became disabled and then unable to accelerate when pressing down on accelerator

Occasionally, the vehicle sometimes doesn't start and allow me to engage to drive gear from being turned off/parked. i sometimes have to turn the car off and back on 1-2 times for the car to start like normal and allow me to select drive or reverse. additionally, i have never been able to successfully sync my vehicle with my hyundai bluelink account despite efforts to troubleshoot with bluelink representatives.

Sometimes, the batteries trip while charging and don’t recharge, don’t charge at the expected speeds, or only charge partially. recently, when charging at home all night and plugged into our level 2 charger, i find find that the car has not charged at all overnight.

Charging prematurely terminates before completed. dealer denies knowledge of this. however suggested charging at "reduced" as opposed to "maximum" level. even charging at "reduced" setting, charging still terminates before complete.

When charging the car on an ac level 2 charger, the vehicle overheats and charging fails. this is dangerous and can cause overheating/fire to electrical equipment as well as rendering the vehicle inoperable due to insufficient charge. there are no warnings ahead of time prior to failure. the problem is widespread and replicable, as evidenced by reports of forums, reddit, youtube, and even a tsb issued by hyundai that fails to adequately resolve the issue.

The vehicle’s 12v system failed under normal use. the vehicle is unable to be started without a jumpstart. i think this is related to the issues other ioniq 5s are seeing.

Vehicle fails to charge at full level 2 charging speeds. when set to 48 amps the vehicle quickly reaches a high ac inlet temperature and stops the charging. when lowered to 38 amps the vehicle charges for longer but eventually reaches the high ac inlet temperature and once again stops charging. level 2 charging must be set to a low max of around 32 amps to successfully charge the car without it stopping the charging. car is advertised to support 48 amps but does not work correctly. myhyundai app constantly gives the "electric vehicle charging alarm" message which indicates the issue occuring.

When using the one pedal driving or "ipedal" mode, the brake lights do not illuminate when braking unless your foot is completely off of the accelerator pedal. this is very dangerous because the vehicle can be stopped very hard without completely removing your foot from the gas pedal. i have stopped using this mode after almost being rear-ended three times within a week due to the car behind me not realizing that i am braking. this issue is gaining media attention. after doing research online, i have learned that there are lots of other people that have noticed the same behavior and have stopped using this mode as a result.

I have an emporia charger connected to a 60amp breaker that can charge at a constant 48amps. this was installed as per the codes by a certified electrician. i have been owning this car since october 2022 and has over 14k miles on the car. till last week, the car charged at 48amps without any issue. but since yesterday, charging starts smoothly till 1-2 hours. then every 6-7 minutes, charging stops for some seconds and starts back up. after several cycles of stop and start charging, the entire charging ends before reaching the set limit. 2 weeks ago, the dealership updated the vcu as per the latest june tsb hyundai released.

Loss of power when accelerating, warning lights came on and off in blinking style. after losing power to zero , it would jump accelerate hard then die again.

The vehicle keeps tripping out due to the charger load on the car. this is concerning due to the repeated failures charging.

Level 2 charging at home interrupting. i charge with a level 2 24a in my dryer outlet and my ionic 5 sel 2023 rwd interrupt its charging 2 times. i had to force my shelf to continue.

This is an electric vehicle, stated in product literature and safety sticker at charge port that it is capable of 48a / 240v ac charging. under normal circumstances, the charging port overheats when supplied with 48a / 240v ac. the vehicle aborts charging due to the overheating charge port when ambient temperature is above 70 degrees fahrenheit. this is a safety risk, and the charge port needs to be designed in a way that it will not overheat when charging at levels specified in the manual and safety tags located at the charge port, regardless of normal ambient temperatures.

Vehicle is rated to charge at up to 48 amps. charging at over 32 amps causes a failure due to overheating

Charging port overheats when attempting to charge at any speed above 6kw/hr. charger is supposed to be rated for 48amps but overheats within minutes charging at 40 amps. have had a tsb installed by the dealer but issue remains

Charging port overheats while charging causing it to stop charging. charging port is hot to the touch. seems like a fire hazard. this issue has gotten worse over the last few weeks.

I have a 2023 ioniq 5 that was purchased in june, 2023 and an 2023 ioniq 6 that was purchased in april, 2023. i had a new chargepoint home flex charger installed in april when i purchased my ioniq 6 and set the charging current to 40 amps. the charger was hardwired directly to my service panel with the appropriate 6 gauge wire and 60 amp breaker. my ioniq 6 reliably charged at 40 amps until early july when it started dropping the charge rate to 23 amps about 40 minutes into my charging session when using the level 2 charger at home. my ioniq 5 only charged at 40 amps for the first week of ownership before starting to drop the charge rate to 23 amps. when this behavior started i plugged an obd2 scanner in and was able to monitor the ac charging inlet temperature and noticed that the charge drop happened when the temperature reached 240f. this causes an issue when planning my charge times because they can essentially double, meaning that my vehicles are not ready for a trip by the estimated time. i am also concerned that having electronics that overheat on an ev may be a potential fire hazard in the future. one of the key reasons for purchasing these vehicles was the advertised charge times. i have appointments with the dealership to have both vehicles examined.

I drove on the freeway around 70 miles/h last july 14th, 2023 with my wife. but suddenly the speed dropped down after i dropped my car at norm reeves hyundai dealer. they keep 4 days for the test. they said all test is ok. but i am afraid to drive on the freeway. i leased jun 17th, 2023 new ioniq5. is this ok? what should i do?

Charge port is overheating and stopping charging. widespread issue after the cars age. their only fix is a software update that drastically throttles current to the car. rendering very long charging times compared to what was advertised. something is deteriorating in the electrical system since the cars charge fine when new. overheated electrical components is very concerning. i hope nhtsa makes hyundai remedy this issue!

This car has detailed complaints online for the absence of a rear wiper causing zero visibility during afternoon rain and thunderstorms. in the event of a white out situation, the driver assistance systems fail to work due to hazardous conditions. you also cannot see out of the rear window or side mirrors because of a design defect. the car has been reported to jenkins hyundai of ocala, where the service department is aware and informed me that hyundai is aware of the safety concerns, but cannot fix the situation or will not offer a fix to the serious safety concern. the service department gave me the phone number to report this as a lemon to hyundai customer care where i was informed twice a manager named [xxx] has my case and would contact me, which she has not done. the case number given is [xxx] information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6)

My car fails to charge using level 2 40 amp charger. the car is supposed to be able to maintain charging between 40 and 48 amps. it is clear that the car is overheating during level 2 charging and suspending charging. this can be dangerous especially if the car is advertised to be able to charge normally using level 2 chargers. note that the summer has been hot. even in my garage at night, i can no longer charge at 40 amps. i have to lower my autel charger's current down from 40 amps to 32 amps, and that seems to work. outdoors during the day, i have to change the car's current to 60%, just so it can continue to charge without overheating. my car is less than 6 months old.

When driving in i pedal mode (which is the one-pedal mode), the brake lights do not light up when decelerating, and it almost caused us to be rear-ended yesterday. drivers pull aside me and tell me my brake lights don't properly come on when i slow down. apparently this defect was on the national news several months ago and hyundai promised a software fix by mid-july. i was just at the carlsbad, ca hyundai service center this morning and was told they do not have a software fix for this issue. this car should officially be recalled by hyundai and the nhtsa and owners should be warned officially they are driving a dangerous, defective car.

After owning and driving the 2023 ioniq 5 for about 4 months, the car was driven from massachusetts to arizona. after driving across the county at 75 mph about 50 min on cruse control the car began to lurch, the speed would drop about 3 mph below the cruse control set point, then accelerate to a mile faster than the set point and then settle down to the set point. this would happen multiple times during the next 100 miles before stopping to charge. after charging and again on cruse control at 75 mph or so, the lurching would begin again. after the lurching started, the power display indicated the front motor on this dual motor vehicle was doing all the work to drive the car, and the rear motor was no longer functioning. later it was confirmed that the rear eop (electric oil pump) which cools the rear motor was not functioning at all. as a result the rear motor would increase to more than 170 degrees f and stop operating. no dtc was stored for the eop actual speed of zero (despite an eop command speed for 800-3000 rpms). no dtc was stored for the mcu motor temperature overheat. no dtc was stored for the mcu motor actual torque of zero when it was commanded for something more. fortunately the hyundai ioniq 5 did command the front motor to take over even though the rear motor was no longer functional, so the car was able to maintain speed most of the time. however, the car is normally 325 hp with both motors. accelerating with only the 95hp front motor on a heavy car was very slow, both in traffic and on the highway. the lack of performance could easily surprise an unsuspecting driver resulting in a collision or worse. i know of at least 5 owners who have experienced this issue. in each case hyundai has been slow at best and refused to repair at worst. the issue is without dtc but can none the less be easily diagnosed by observing the odb eop actual speed (when the car is driven) will be zero with an eop command speed >0 .

When driving down the road, road debris and water blind the back windshield. there is no wiper and the design does not clear off the back windshield, causing you not to be able to see out the back windshield. this is causing a safety issue with the vehicle, and i almost had an accident because of it. additionally, the side mirrors will not clear off water, causing them not to be able to use during rain storms. this vehicle is not safe as is. hyundai has stated it is a design defect and they won’t do anything about it, per the corp office and the dealership, jenkins hyundai in ocala, fl

Charger does not charge

Level 2 charging intermittently shuts off or is throttled back to very low charging rates. this results in car not being charged enough to be used. hyundai advertises charging rates of 10 kw, but charging is either throttled back to 5 kg or shut when charging at 48 amps. . hyundai claims to know of this problem where some internal components of car overheat.

Our car repeatedly fails to complete charging using level 2 chargers at 48-amps. the car sends an overheating error, stops charging and then starts charging again later (presumably after it has cooled down). sometimes is fails to restart charging completely. this makes it impossible to get a fast, reliable level 2 charge in a timely manner. we get a text to our cell phones alerting us that charging has stopped due to overheating. we have notified our dealer and they are offering a software patch from hyundai that simply slows the charge amperage to 28-amps when an overheating error occurs rather than offering a hardware solution that allows for full 48-amp level 2 charging as the car is supposed to be capable of.

I took possession of my vehicle 1/12/23 and charged it successfully in my garage with my level 2 charger at 48a per hyundai's specifications until may 19, 2023. charging aborted prematurely on that date due to overheating of the charging port. starting may 20, 2023 i lowered the charging rate in my level 2 charger to 40a despite hyundai's stated specifications that 48a was supported. i also started tracking my charging with an obd2 scanner and noted the ac inlet 1 port temperatures. from 6/26/23 to 7/25/23 as summer temperatures in my garage here in nj from 75 to 84, peak port temperatures reached 226 to 237 degrees but charging completed. on 7/28/23 with a garage temperature of 86, port temperature reached 239 and charging aborted again. i then had to lower the charging rate to 36a. this is lengthening my charging times and is not consistent with hyundai specifications when i purchased the car. i am concerned i will have to continue lowering the charging rate to continue operating the vehicle. these high temperatures may also be dangerous. hyundai so far has merely issued a technical service bulletin 23-ev-003h that does not fix or replace the inadequate part(s), it merely slows down charging inconsistent with their specifications. this is not acceptable and as a safety issue nhtsa should require hyundai to recall and replace the insufficiently performing part(s). my car is available for inspection. this overheating and lengthening charging time is a safety issue. the vehicle has not been inspected by the manufacturer or local dealer. there were no warnings of these occurrences. charging simply halts when it exceeds 237 degrees fahrenheit for my 2023 model.

While driving on the highway, after about 45 minutes, the electric vehicle goes into turtle power-limited mode. the vehicle instantly reduces in speed from 70mph to as low as 35 - 45 mph. there are no warning lights or sounds. if you immediately stop the car and let it sit, it will work again temporarily but after 30 - 40 more min or less of driving, it will again go into turtle mode. additionally, acceleration is non-existent when its power is limited, inhibiting the ability to safely drive as required to pull over or across intersections. this has been a constant event occurring multiple times and each time the vehicle has been on a freeway or highway. the dealer applied the repairs in the photo supplied, but they did not work.

Driving on the highway, my car will suddenly lose power momentarily and the speed drop 3-5 mph. my accelerator is unresponsive. then the car will accelerate quickly with a jerk to accelerate to the set speed. may occur on level ground but often occurs at the bottom of a hill. i have no control during this loss of power.

Rear electric motor overheating on highway and motor shuts off only allowing front motor to work but acceleration is near nothing and is extremely dangerous. no codes or warnings pop up was told by friends with other ioniqs that it's a electric motor oil pump that malfunctions but hyundai refuses to solution nd realize that there is a problem with motor malfunction

Help! i now regret that i bought a hyundai ioniq 5. i hoped the recent campaign would fix my problem, but i think it is now worse. while driving my speed drops 3 to 4 miles per hour, then the car lurches forward to regain my speed. at first i thought it was when using cruise. now the car does it on the highway even when not using cruise. when it starts dropping the speed, the accelerator is not responsive. i have to wait for the car to slow completely down before the throttle will respond. i do not notice the problem around town. it seems to cruise fine for about 50 miles and then begin to slow and speed up out of my control. i think it is a safety hazard. it certainly drives me and my passengers crazy. please do something!!!

9/11 saturday lease deal agreed 9/13 car picked up 9/23 air conditioning stopped working and car throws a warning message requesting immediate service. 9/25 parts required to fix the problem not available in the us or canadian hyundai parts inventory and dealer does not know when they will get the parts. 10/3 dealer advises no update on parts. hyundai customer care notified today and is investigating. from what i can determine, this is the dreaded iccu issue which plagued the 2022 ioniq 5.

Car: 4 month old 2023 ioniq 5, starting on september 12, 2023 my car would not take any charge at all, effectively make my car useless as i am down to 10 miles of range. for the next several days i tried multiple chargers at different locations trying both 350 kw and 7kw chargers. other cars were able to charge their cars immediately after i moved from the charger. i have read that the software update i am going to get will reduce my charging capacity rate to fully charge slower. this car is not performing at the stats i chose it for. i will not be able to use this car if it cannot take fast charge for a full charge. i was not made aware of this issue that was well known to hyundai (they have been dealing with this issue with its earlier ioniq models) before going forward with this car. nor would i have decided on this car if this issue was known to me.

See uploaded photos and document.

Driving on freeway when adaptive cruise control turns off and had a sudden complete loss of acceleration, we had steering and brakes only. sudden reduction of car speed in traffic could cause accident. has only happened once in 20k miles. (no acceleration) adaptive cruise control shuts off for no reason, but dealer couldn't replicate. in recent 8k trip we photographed warning on dash 17 + times after shut down. dealer couldn't find any saved trouble codes for this. no warnings prior to any occurrence only after, dash turned off on acceleration loss.

I started getting the error electric vehicle system error in my month old ioniq 5. after driving a few miles, the air conditioning stopped working completely. and after a few more miles, the vehicle started to throttle down the speed to 20-25mph that too on the i95 with a 65mph speed limit. had to turn on the emergency lights and drive slowly till i reached my destination. after googling for a while, i found that this issue is related to the iccu failure that is pretty common in the ioniq 5 and hyundai is yet to issue a permanent fix for this problem. i don’t know why we are allowing the sale of these vehicles with known issues. you can even reddit the iccu issue.

The car driving selector order is drive, neutral, reverse which is the wrong order. it should be reverse, neutral, drive, which is the same for all the cars i have driven since the late 1960's. in fact, the hyundai santa fe has the correct order. also, my volvo xc60 has the correct order. i thought that your standard 571.102 addressed this problem. i am having the same problem selecting the wrong drive when i go from my volvo to the ioniq 5.

When driving my new hyundai ionic 5, the dashboard display is set up such that when i am in my preferred seating position, and my hands at 10 and 2 on the steering wheel, i cannot see the spedometer reading. i basically don't know how fast i'm going and less i change my hand position or move my head. this requires a fair more amount of time for me to take my attention off the road. this is not an isolated incident. i have asked my friends, who range in height from 5'2 to 6 ft 3 to do the same thing. they all report the same problem when they are in their preferred seating position. i am also noted many complaints about the same issue on the ionic 5 internet boards. this problem is caused solely by hyundai's choice of a main display layout. this is the way it is laid out from the factory, and there is no way to change the speedometer position on the main display as a user.

Stop vehicle and check battery supply error and the car died. no power whatsoever. likely linked with the faulty iccu issue.

I'm surprised there are no safety recalls on this vehicle given how cruise control operates & how close to the cruise control toggle switch the steering wheel is indented for hand placement at 10 a.m./2 p.m.we purchased a 2023 ioniq 5 on 02/25/2023.when the vehicle was delivered to us we were not told that the cruise control does not disengage when the brake pedal is applied.it merely pauses.there is nothing in the owner's manual that addresses cruise control operation.in any other vehicle we have owned, including other hyundai vehicles, cruise control cancels when the brake pedal is depressed.without proper training/information & without cruise control being addressed in the owner's manual we had no way of knowing this.2 months after purchasing the vehicle, while pulling into a parking space driving 3 mph i stepped on the gas & the vehicle returned to the previously set cruise control of 45 mph.whereupon it went over a parking bumper, landscaping, curb, $ into a busy street, scraping the passenger rear portion of the vehicle & damaging the wheel.we took the vehicle to the dealership, larry h. miller on 05/03/2023. they were unable to duplicate the mishap.the gm of the dealership indicated that in all probability what occurred was inadvertent touch of the toggle switch.he indicated that this unique cruise control operation was experienced by others, including himself.on 05/24/203, he recommended we contact hyundai motors usa to report the incident.doing so resulted in numerous phone conversations, emails, and 2 inspections of the vehicle. finally, on 10/19/2023 we were advised in a hmausa letter of resolution that said, "no manufacturing defect was identified." they are refusing to pay the $2,247.92 repair bill (on 04/26/23.may be higher now due to rising costs.)we maintain the incident occurred due to a design flaw & unique cruise control operation.we not only want hyundai to pay for the repairs, we want the nhtsa to investigate so this won't happen to anyone else.

The car does not switch from reverse to drive under certain conditions, resulting in uncommanded reverse motion. gear selection on the ioniq 5 is controlled by a twisting knob at the end of a stalk on the steering column. drive is selected by turning upwards, reverse by turning downwards. the moving part springs back into the neutral position once a gear is selected. occasionally the car does not switch from reverse to drive. this is extremely dangerous as the vehicle shoots backwards when the driver is expecting it to move forward. a driver will likely press the accelerator more firmly after having physically moved the gear selector to drive and expecting the vehicle to move forward. since this happens after backing up, it is likely that obstacles or persons are behind the car when this happens, and absent a very fast reaction by the driver this will result in accidents and injuries. the issue is triggered when the car is not at a complete standstill when drive is selected. even barely noticeable residual backward motion triggers it. there is no haptic feedback to alert the driver that the car ignored the driver input. as drivers are expected to pay attention to their surroundings when maneuvering, visual feedback (via the gear indicator on the stalk and possibly a dashboard notification) is not useful. there is a small auditory cue, but it is easily missed when in a conversation or listening to music, especially because the car frequently dings, pings, and beeps for other reasons. not to mention, hearing-impaired drivers will also miss this. the driver should not be able to physically move the gear selector into the drive position when the car is not accepting that input - the twisty bit should be locked out to prevent this. or at the very least, if a crucial driver input is discarded, the car should instead default to a safe behavior, i.e. put the car in neutral instead of reverse.

The following is an incident that happened yesterday to my wife, who is an experienced driver: whilst driving south on i5 from seatac toward tacoma in heavy rain with surface spray the screen above the steering wheel mentioned collision avoidance was not working and radar was not working. when i applied the brakes to slow down no response from the brakes. i then let off the brake and tried several times to apply the brakes each time with no success. i still had full control of the steering and could still steer the car. this lasted for about 30s then the brakes started working again. the error messages regarding collision avoidance and radar not working would continue to pop up even after the brakes were working. after stopping the car and turning it off and restarting several hours later the car no longer displayed any error messages. no vehicle or passenger were hurt in this incident, however if the traffic had slowed or stopped this outcome could have been very different.

This model has known issue. as i found after it occurred to my brand new ioniq 5 . it has only 320mi. it had 87% battery and all of sudden it stop on road. no power on dashboard. after taking to service station they found “ "inspected and found code p1a9096- dc/ dc converter input voltage sensor fail. referenced campaign 997 for concern. with code present, per tsb, replace iccu and fuse." this same issue i noticed in 2022 after reading forum. after putting my car in service station still i don’t have my car. it’s almost 17 days. if this car had recall i could have saved my time and unnecessary effort. plus thank god it was local city read( school zone) if i was in highway and same thing happen to me it might be life threatening situations.

Intermittent electrical / brake failure . put vehicle in reverse . brakes failed to stop vehicle . vehicle has had electrical issues before . waring lights came on for steering and tire pressure in the past . recall then came from hyundai for the iccu .45 minutes before the collision, the front collision warning came on when i was stopped at an intersection with no one in front of me . i stopped the vehicle and turned the vehicle off . turned on the vehicle and it reset the warning lights and sounds , and i continued to drive . later while pulling out of a parking space in reverse ,i stepped on the brakes but the vehicle did not stop . i pumped the brakes to no avail . after the collision , the brakes worked again when the tow truck driver placed the vehicle on the flatbed .the hyundai dealer , after the vehicle had been in their possession for several weeks with the battery disconnected, said there was no problem they also had a factory rep look at the vehicle and he made a report . we have not been able to get a copy of the report . vehicle is still at the dealership . when notified by the factory rep of their claim that the vehicle had no problems , the vehicle had been out of service more then 30 days .

The car proceeds by itself and does not stop even when brakes are engaged. this happened 2 times. once in reverse and once forward, both caused severe damages to the car. in the forward incident, the driver was wearing seat belt but air bags deployed with impact.

The ioniq 5 has a serious problem with 12 volt battery drain. three times, i have returned from vacation and found that the 12 v battery was completely dead. this is a huge issue if a consumer cannot rely on their vehicle to start in an emergency. i called a dealer in renton, washington about the issue and the technician responded, "this is a common issue in these types of vehicles." i am sorry, but that is not acceptable and is a vehicle defect. with electronic doors, you cannot get into the vehicle to jump start it, if the vehicle is locked, unless you can pull the manual key from the key fob and open it with the key. 12 v battery drain is killing the lifespan of the battery. looking on the internet, other owners are complaining of the same issue. my vehicle sat for one week two times in december and i just returned form a two week vacation to find the battery completely dead. i only have 4484 miles on the vehicle and it is a 2023 car, so it is not an old battery. the car has a serious electrical defect.

Driving on the freeway at approximately 70 mph, the car lost the ability to accelerate and started to lose speed. i had my foot on the gas but the speed was dropping. there were no warning lights, messages, or other alerts prior to the loss of acceleration. the screen remained on during the loss of acceleration but a phone call was lost. safety at risk for obvious reasons. i was able to put hazards on and move to the left-hand shoulder. i turned the car off and on again and was able to speed up again to merge onto the freeway. for the remainder of the drive (approx 25 min), everything was fine. we have not taken the car in yet for inspection. the car charge was over 50%. i had driven the car on the freeway with no issues for an hour earlier in the morning, for 15 min in the city, and then for another 25 minutes on the freeway prior to the incident.

I was waiting to charge up my ev when the dashboard started lighting up red. stating to turn off vehicle due to battery failure and safety. and then all of the sudden the car just turned off. and would not come back on. so my husband had to go rent a vehicle at avis so we wouldn’t be stranded so far from home. and to continue to go to work. so after 30 minutes my husband suggested that i try and restart the car and it did come on. we were stuck in the freezing elements due to the battery failure. which seems to be an issue that they had back in 2022. that wasn’t correct or thought to have been. after i did some research yesterday 1/24/24. i called and made the local dealership aware of what i discovered that i took my car to. because they couldn’t see if they would get same issue but they stated they didn’t.also called into road side assistance on the day of the incident to have the car towed. but canceled after the vehicle started back up after 30 minutes with no response.

Driving the vehicle on the highway for longer than 60 miles at highway speeds the vehicle goes into “power limited” mode and a turtle pops up on the screen. you are unable to accelerate the car and once this happens you have to leave the car off for at least 5 minutes and then not drive above 65mph again or it will keep happening over and over. after taking it to the shop hyundai corporate said we need to drive the car again to see if they had fixed it. approximately 65 miles into the trip it happened again and this time i was almost rear ended and cars were swerving around me on the shoulder to avoid crashing into me. hyundai is saying that they cannot reproduce the issue but they are not driving the car on the highway for more than 60 miles. the safety of not only myself and my family is at risk as well as other people on the highway behind and next to us. the vehicle is currently at the dealership and they said there are no error codes so they don’t know what’s wrong. the only warning that popped up said “power limited” with a turtle.

The iccu has failed after the recall repair was completed in september 2023. when the fuse pops the car indicates a check electric vehicle system message in the driver information screen.

12/30/2023 at approximately 5:30pm i drove home with the ipedal engaged. the ipedal was installed as a download to the car in august 2023. my daughter was in the passenger seat. i began to back into my driveway but shifted to drive to straighten out the car. the car began to roll forward i took my foot off the accelerator but the car did not stop in spite of the ipedal being engaged. i put my foot on the brake pedal which went all the way to the floor to no avail. the car rolled slowly into an electrical pole which brought the car to a stop. neither ipedal nor the foot brake pedal had any effect on the car. i then put the car in reverse and backed the car into my driveway and the brakes worked as expected. when i then attempted to charge the vehicle, the charging port would not open. i could hear the motor working to open but it would not open. on 1/11/2024, i again attempted to open the charging port and this time it did open. so, two different electrical (including the brakes and the charging port) were not working properly. inasmuch as the charging port again worked and the brakes again worked, there clearly was a malfunction that was random and unpredictable and also nearly impossible to reproduce but if this happened once, it could happen again. the brakes failed. had we been traveling on a busy road, or at the top of a hill, we would have faced significant bodily harm, death to ourselves or others. this car had been driven locally, predominantly on local roads. the car is available for inspection and has only been driven on the dealer lot since the the incident. there were no warning lights or messages to indicate that any issues existed. the manufacturer has executed an inspected but has not reproduced the problem. the manufacturer and dealership claims the car is safe to drive without addressing the brake failure. i do not believe the car is safe to drive without a determination of how the bake failure happened or without a repair to that issue.

Driver was moving forward into a space in a parking garage between two other vehicles. driver had pulled most of the way in and was slowly inching forward. as the car came to a stop, it suddenly lurched forward, hitting a concrete wall. the collision warning system did not alert, and auto-braking did not occur. the car was in regen level 3, and auto hold was not activated. in the months prior to this, the car twice had a similar situation when coming to a stop at an intersection with foot on the brake, then suddenly lurched forward, nearly rear-ending a car in front. there was no visible damage to the concrete wall, and a police report was not made. hyundai says they want to inspect vehicle, but have not done so after a month. it is easy to believe that this was driver error, but it absolutely was not. car lunged forward and accelerated into a wall with only the brake being applied. all of these events have occurred after the hyundai ioniq 5 software update was applied on 26 sep 2023.

I heard a pop from the rear of the car and warnings came up on the dash. the vehicle was power limited and needed to be towed to the dealer. it was diagnosed as an iccu failure and blown fuse. this was the problem supposedly addressed in hyundai tsb 997 (nhtsa id number: 10240086). that service was performed on the vehicle in september 2023. we were lucky the incident occurred on a city street and not on a freeway or rural highway where the sudden loss of power could have been very dangerous. the software fix applied under hyundai’s tsb clearly did not fix the issue.

The contact owns a 2023 hyundai ioniq 5. the contact stated that while driving at an undisclosed speed, a jeep veered into the driver’s path, and the forward collision avoidance: automatic emergency braking system failed to activate as designed. there were no warning lights illuminated. the vehicle was taken to the local dealer, who determined the vehicle was working as designed. the vehicle was not diagnosed or repaired. the vehicle was taken to another local dealer, feldman hyundai of new hudson (30492 lyon center dr., new hudson, mi 48165), who stated the vehicle was working as intended. the vehicle was not diagnosed or repaired. the manufacturer was notified of the failure, but no assistance was provided. the failure mileage was approximately 15,000.

12/30/2023 at approximately 5:30pm i drove home with the ipedal engaged. the ipedal was installed as a download to the car in august 2023. my daughter was in the passenger seat. i began to back into my driveway but shifted to drive to straighten out the car. the car began to roll forward i took my foot off the accelerator but the car did not stop in spite of the ipedal being engaged. i put my foot on the brake pedal which went all the way to the floor to no avail. the car rolled slowly into an electrical pole which brought the car to a stop. i previously filed a complaint here but i have since learned that ipedal may disengage if the car is put into reverse. there is not warning light to alert the driver that ipedal is disengaged so the driver is not aware that the brakes may not work as expected. i believe this may have been the case with my accident. however, this does not address why using the foot pedal for the brakes did not stop the car. have found many complaints about this on various forums and believe this aspect of ipedal needs to be addressed. it should not disengage unless the driver instructs the car to do so. i have not been able to find documentation of this functionality in the manual, but i have searched and will continue to do so.

Vehicle was taken to dealer for recall repair. upon completion i made sure everything was good to go. and realized the navigation system was not updating. service agent took it back and was advise it needed a 4 hour update. car stayed overnight. following day they informed me they couldn’t find the problem and were in contact with tech support. they were advice to just replace the navigation antenna. dealer has place the order for the antenna. my only problem is while we wait for the antenna my car’s location is at a random place so if it where to be taken there wouldn’t be a way for me to know the location of it.

The navigation system in this car has an additional feature which is always enabled even if a destination is not programmed into the nav system which is supposed to warn drivers if they are going the wrong way on a highway. intermittently the system erroneously indicates that the driver is going the wrong way. a voice warning is repeated issued and a warning symbol is displayed on the instrument panel. it is shocking, very distracting and frightening at first. then it becomes a driver irritation, and eventually the driver tries to ignore the constant warnings, completely defeating the purpose of the safety feature. i’ve seen on the ioniq forums where other drivers have reported this intermittent problem. our local dealer would not check our car because the nav system was not failing at the time we brought it in. the problem can last for 5 minutes and then stop or can last for a duration of a car trip. for drivers unaware of this problem, they could easily be frightened enough to cause unsafe driving.

3 issues: 1. 2 x, driving over a hundred miles the sensors get faults. none of the sensors work. does not detect other cars. they updated my firmware, wiping the faults. 2. once stopped at stop light, the sensors can start detecting items not there. 3. when parking the car does not detect items that are there. (i have video, dealerships so far refuses to fix) i am still trying to get them to fix it. additional concern, talking to other drivers, they have similar issues and responses from the hyundai dealerships. this is for both the ioniq 5 and 6. pictures: shows no other car image, or sensor detection. i took the picture a behind to give context. i can provide the videos if needed. answers to question, separated with a comma: yes, answered above, trying to get confirmed, the car has been inspected by hyundai service center, and the errors were wiped by a update + reset.

The car loses power, slows down dramatically, and will not respond to the accelerator pedal. this failure has happened twice. the first time i was driving at about 40mph on a side street when the car started slowing down with no warning and limped along at about 20mph. i could not get it to move faster so i put my flashers on and made my way to the side of the street, pulled off of the road and shut the car off. when i restarted the car it drove normally. i reported the failure to hyundai and they had never heard of this happening. they kept the car for 2 days and couldn't replicate the problem. that was about 2 months ago. yesterday, 3/4/24, i was on the freeway going about 74mph using the smart cruise control. i had just changed lanes when the car lost power and i got the message, "smart cruise conditions not met." my speed dropped to the low 40's as other cars were whipping past me. even though i floored the accelerator i got no response. i started the flashers, made my way to the right lane and got off on an exit ramp. i pulled off to the side of the ramp, parked the car and turned it off. once again, when i restarted the car it performed normally. this is very dangerous! i could have easily been rear ended by another, faster car on the freeway since i slowed down so quickly without braking lights lighting. i brought it back to the dealer again today and they have kept it to run diagnostics. i don't expect that they will find any problem this time either.

12v battery died this morning. the car main battery had 77% state of charge and still the 12v failed. the main battery is supposed to charge 12v as long as it is above 20% state of charge. this seems to be a wide spread problem and hyundai is not taking any pro active steps in resolving this. all recommended tsb (technical service bulletin) has been applied on the car and car was serviced last week and passed the multipoint inspection.

The vehicle made a loud popping noise and lost motive power. dashboard lit up with battery symbol and said to check electric vehicle system. dealer service is certain it is an iccu failure. the vehicle had the software update to “fix” the iccu issue thousands of miles ago.

I was driving at night on a freeway marked as a 65mph speed limit. i had the adaptive cruise control turned on and set to automatically follow the road speed limit. there was intermittent rain at the time. suddenly my car began to accelerate, but i was able to stop the acceleration by stepping on the brake to disengage cruise control. i tried re-engaging cruise control and it immediately accelerated strongly again. that is when i noticed the cruise control speed had been set to 85mph. i disengaged cruise control for the rest of my trip home and was able to drive normally. subsequently i learned that the car detects speed limits by both map data and visually recognizing speed limit signs, so i assume it mis-identified a 65mph sign as 85mph. the auto speed feature set the cruise control speed to 85mph even though that is much higher than any possible speed limit in california. i disabled the auto speed feature of the adaptive cruise control and have not had any problem since then.

I attempted to drive my car to work. the car started but would not shift into gear. a red battery light indicator was on in the lower left corner of the screen. i contacted my dealer and they asked me to jump my car and bring it in. i did that. they indicated that my car had experienced iccu failure and that a part would need to be ordered. the car had already been updated to address the iccu failure, or so i thought. this is a known issue with 2022 models.

Electrical system warning lights came on and loud alarm indicating the need to stop the vehicle immediately. diagnosed by mechanic as iccu failure and associated 12v battery issues—so, typical ioniq5 problems. just lucky i wasn’t driving on the highway.

First indication something was going awry was when attempting to charge the car. heard normal click indicating charge had started, but no audible announcement that charging had started. car started throwing "check electrical system," then power plummeted and became unresponsive to accelerator, followed by "stop car. check electrical system," then finally something like, "battery is being discharged by external devices."** car had to be towed about 60 miles to nearest hyundai ev service center. eight days later, i got a call from service saying that the iccu needs to be replaced. they will update me once eta of part is known.

I was driving 45 miles per hour on a 2 lane highway, when the car suddenly started beeping, lurched, and dropped to 25 miles per hour (low power mode). after pulling over at a gas station, i was able to run the car in this low power mode for a short time, and then the 12v battery completely died. the main battery in the car was at 78%. there was no warning light that this would happen before making that drive. i took the car in to the dealer and they informed me that the iccu failed. i see that there is an investigation underway for the 2022 ioniq 5, and that the 2023 ioniq 5 has the same components. please take this investigation seriously as if i were going on a faster highway or more cars were around, it could have resulted in a major accident. this car has just over 10,000 miles and was just purchased under a year prior at the time.

I bought my ioniq 5 in april 2023, starting in june 2023 i started having issues with the internal navigation system locating my vehicle on a different route than i was actually on. when i connect to apple carplay to be able to use google maps or waze, it also throws my cell phone system off and will be taken into wrong streets. vehicle navigation also detected me driving in the wrong direction alerting me not to enter the street. i took video and photos to the dealer starting in june 2023 for a few months. they first updated the software which took over 6 hours, and my car spent the night at the dealer. unfortunately it did not resolve the problem, they then replaced the antennae also not resolved issue. they replaced the camera in front of the rear view mirror, also no resolution. lastly they replaced the head unit under warranty. my car continues to have the same issues with navigation and recently while on the freeway and the navigation and apple carplay were acting up, when i switched lanes it alerted me of a collision and car began to break while driving 65 miles per hour. this could have caused me to be rear ended if there would have been a vehicle behind me. i do not feel safe driving this vehicle which i depend on the navigation maps for my daily work. currently i am avoiding driving on freeways to ensure the car does not suddenly brake and cause me to be rear ended. i contacted the dealer and they stated they have not detected the same issue on other ioniq 5's sold at puente hills hyundai in california. in researching through the internet, i found there are others experiencing the same issue. dealer asked me to bring my car in once again, but i am not sure what they can do. hyundai needs to figure out the issue on the ioniq 5 navigation system and issue a recall to fix the safety glitch with the system.

The contact owns a 2023 hyundai ioniq 5. the contact received notification of nhtsa campaign number: 24v204000 (electrical system) however, the part to do the recall repair was not yet available. the contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. the contact stated that while his son was driving at an undisclosed speed, the vehicle stalled. the battery warning light was illuminated. the contact's son was unable to restart the vehicle. the vehicle was towed to the dealer; however, the vehicle had not been diagnosed. the dealer was made aware of the failure but confirmed that parts were not yet available. the vehicle was not repaired. the manufacturer was made aware of the failure and a case was filed. the failure mileage was approximately 8,400. parts distribution disconnect.

My hyundai ioniq5 suddenly lost power while i was driving it. i was only able to go 20 mph for a short period of time before it completely died. i had to have it towed

Sound deadening foam inside the tire delaminates and causes severe wheel imbalance. this is a widespread issue on all the hyundai ioniq 5 forums with this tire. mine cost me $300 and countless hours to diagnose. it also severely impacted the cars handling and prevented the car from driving over 46mph (in my case), which is extremely dangerous on interstates. my local tire shop balanced the tires with the maximum allowed amount of weights, but then the vibration was still there at 59mph. the hyundai dealer then diagnosed it and they charged me $180 to do a dynamic balance. according to their results, the tires were "bad" and needed to be replaced. i went to costco to replace the tires at a cost of

Rain day driving bottom cover drop off and so many noise back seat or trunk cover area already fixed 2 times dealer still noise many driver complain

Car bounce if at 62 mph had dealership check balance and rear two tires could not balance. dealership de-rimmed tires and found the inner foam has fallen or detached from the inside of tire causing. resulting in foam moving around inside tire throwing g off balance.

Iccu failed post software update. driving home and was suddenly alerted electrical vehicle systems were malfunctioning, and shortly following (1 or 2 minutes), the car flashed a new warning telling me to stop the vehicle. had i been on a busy highway or a one lane street with low visibility, it would have put me and my wife in danger of being struck by other traffic. luckily, i was very close to home so i drove home and did not drive the car for a few days. while researching what to do, i had read about the iccu failure and my problems were similar. i called a tow truck to get it out to a dealer. when attempting to shift the card into drive or reverse, the car would not move. dealer has determined that my iccu is in fact bad and is currently in the shop being replaced. unknown how long this will take.

Both the 12v battery and the iccu failed while driving. the dashboard light gave us 1 minute to pull over before the battery system died and the car stopped fully dead. needing towing to dealership service.

12v battery died and vehicle not operable. luckily vehicle was parked. this has recurred multiple times (3+) issue has been confirmed by dealer. not addressed yet. no warning lights of imminent problem

Unexpected and uncontrollable shaking of steering while driving at speeds over 40mph

Driving on hwy with 80% charge when we left the house. loud pop, and complete loss of power in a very dangerous portion of a highway with our baby in the backseat. almost not able to control vehicle to side of road

The contact owns a 2023 hyundai ioniq 5. the contact received notification of nhtsa campaign number: 24v204000 (electrical system) however, the part to do the recall repair was not yet available. the contact stated while driving 40 mph, the message "stop car - check power supply" was displayed. the contact pulled over to the side of the road, and her husband met her at the location. the contact stated that after her husband restarted the vehicle, a message advising to drive was displayed. the contact stated while her husband was driving 30 mph, the vehicle decelerated to 20 mph and stalled. the contact's husband was unable to restart the vehicle. the vehicle was towed to the residence. the local dealer was contacted and informed the contact that the earliest availability for the recall repair was june 10, 2024. the vehicle was not diagnosed or repaired. the contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. the manufacturer was made aware of the failure but was unable to assist the contact in locating a dealer who had the part for the recall repair. the failure mileage was unknown. parts distribution disconnect.

The integrated control unit (iccu) failed immediately after getting the safety recall software installation. recall maintenance that morning, iccu failed that afternoon. heard an audible pop and then multiple warnings went off. fortunately i was in a location where i could pull over safely, and in a location where i could get help easily.

My car has 16000 miles and originally came with this exact tire brand. apparently, because i drive an electric vehicle the tires have sound dampening foam on the inside of them. they are supposed to break down slowly with time however the last four months i have had two incidents where the foam became unglued from the rest of the tire, balled up, and caused a huge amount of shake in the car as i drove at speed 60 mph or higher. it did not affect low speeds. this is a safety hazard. the first time it occurred, i considered an outlier and michigan did replace the tire. the second time it happened , only a few thousand miles later i asked that the foam be removed from the tire as i am concerned that this is a safety hazard moving forward. michelin needs to have this tire recalled. i asked the hyundai dealership if other ionic five drivers with the same tires had come in with the same issues. they said absolutely we see it every day. why is this tire still on the road. i reached out to michelin and they refused to refer me onto anybody to discuss this further. they also refused to pay for the foam removal process. that is why i’ve decided to involve you. please feel free to contact me at [xxx] to discuss further. thank you for your consideration, [xxx] information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6)

[xxx] - took hyundai ioniq 5 to all star hyundai pittsburg for servicing and recall issue. [xxx]: saw an error reading check electric vehicle system! on the ioniq 5, after which a bluelink rep was connected and stated i needed to take the car to a dealership asap. no appt available until july so advised to take car back to all star. called all star and spoke to josh who said there were no appts until [xxx]. arrived all star 9:15. i stayed until 3:15 with a lot of back and forth on diagnostics, warranty, how long for repair etc. called hyundai customer care and spoke stephen who said the car was purchased less than a year and it would be under warranty for repair. i spoke to david, manager all star, who said he does not know when the diagnostics will be complete/ when car would be ready. told me to go to enterprise and get a rental at my own expense. went to enterprise pittsburg in an uber paid for by all star. when i got there no cars available. called all star multiple times no answer. took an uber back to all star to retrieve items in car and took uber home at my own expense. wednesday, went to enterprise to obtain rental at my own expense and returned to all star. they said they were waiting on rep to further review the car. today is may 28th and my right knee is now very painful and irritated from driving the rental as the 1st one had broken drivers seat and the 2nd one is still too low. i have spoken to all star and hyundai customer care to please provide a car rental similar to ioniq 5 and i have received no assistance. i have spent almost $2000 on ubers, rentals and gas. hyundai still has not covered my rental expenses. i have spoken to approximately 16 reps of these companies and have received very few call backs or assistance. today i called hyundai motor finance to discuss monthly payments for a non-working car at all star and was transferred and placed on a lengthy hold. no one returned to the phone call. i am seeking your immediate assistance. information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6)

Vehicle's charging port appears to be overheating to the point that thermal throttling is occurring when attempting to charge. this issue first occurred in mid-may of 2024. vehicle charged as normal before then. vehicle was serviced by dealership for this issue on 05/29/2024. a software update was applied that did not solve the problem. in an attempt to find updates on this problem, i contacted hyundai customer care by phone on 05/30/2024. hyundai customer care agent read a scripted response that was first released to the public in 20203 and advised to wait for an unknown amount of time for an unknown fix which may or may not come to pass. hyundai customer care had no updates more recent than the 2023 release from which the customer care agent read. this appears to be a known issue with no actual fix available to the customer and no eta on when such a fix might be released.

Latest recall had been applied, 2 weeks later a dead 12v. new one put in and 4 weeks later a pop and an immediate pull over vehicle charging system needs inspected. iccu failure.

When parking in a supermarket parking lot i slowly approached the space while braking. as i turned left into the space and released the brake pedal to allow the car to slowly roll into the space as i always do, the car surged as if someone floored the accelerator. i veered left to avoid a head on collision with the parked car facing me and went diagonally between the right front fender of that car and the left front fender of the car parked in the space to my left. i sideswiped both sides of my car and damaged the front fenders of both cars before i was able to apply the brake and bring the car to a stop. there was a mother with her two young children loading groceries into the car in front of me. fortunately i avoided hitting anyone, but the witnessed the accident. i was in shock. my car suffered $25 in damages. there is absolutely no way i accidentally applied the accelerator, and if i had i would never have floored it! the car malfunctioned. i reported this incident to hyundai also. they supposedly were sending someone to inspect the car at the auto body repair center.

Failure of the vehicle power supply system. iccu failure. car was alerting and would not go over 24mph. this is the result of a recall that i had already brought in the vehicle for in april, but they only performed a pass/fail test and at the time it "passed" so they didn't replace the iccu and fuse that is required to be replaced. two months later the car died, had to be towed and now has been at the dealership for two weeks already - 17waiting for the parts to come in. this is ridiculous because hyundai is aware of this problem and is not fixing the issue, merely kicking the can down the road and then stranding owners for weeks without their vehicles. unacceptable.

I have had my 2023 ioniq 5 for 13-months. i have had two safety recall services performed - i understand those were iccu software related. on [xxx] my car sounded a sudden alarm and a warning appeared saying to "stop and check power supply." i was not able to immediately pull over but found the ability to pull over within about 1/4 mile, the vehicle seemed to be losing power. it was frightening as there were many pedestrians and cyclists and i had no idea what was happening. the car was towed through aaa - we had difficulty getting it onto the truck as there was very little power and almost no power steering. the vehicle is now at the rowe hyundai dealership in westbrook, me. i was told the iccu would need to be replaced as well as some kind of fuse. i am not sure i will feel safe driving this vehicle even after it is repaired. information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6)

Charging port burned during dc fast charging session, resulting in melted charging pin. unable to insert ccs connecter due to melted pin obstructing insertion. further damage to electrical systems unknown. no warning signs shown aside from vehicle charging session ending. lack of safety systems to prevent melting/burning of charging pins leaves potential for general vehicle fire, battery fire, etc. dealer has had car in possession for over 10 days with no update. corporate contact has been unresponsive.

Received a code: dtc p1aa600 and did some research and was made aware that the ev battery needs to be exchanged out for a new one.

Incident occurred when head-in parking in a space pointed into an stores exterior wall. there were no parking/wheel stops, just pavement then wall. no adjacent cars. i was decelerating with foot completely off accelerator and over the brake pedal. the car is an ev and was in 3rd level of regenerative braking, slowing down quickly. as i completed the turn into the space and began straitening the wheel, the car suddenly and rapidly accelerated and crashed into the wall. the only likely explanation i have is that i inadvertently pressed the driving assist button with my right thumb or hand while turning the steering wheel, which would have activated smart cruise control, and, if the necessary conditions were met, set the minimum speed to 30 km/hr. the car manual states: "if your vehicle speed is between 0 - 20 mph (0 - 30 km/h) when you press the driving assist ( ) button, the smart cruise control speed will be set to 20 mph (30km/h)." the foward collision-avoidance assist was set to active assist, which should have applied the brake to stop from colliding with the wall, but instead the car accelerated. (note, the parking assist feature does not usually recognize head-in parking.) the car has two driving assist settings: based on drive mode and based on driving style. if the latter is selected, three additional features are set on sliding scales: distance (close to far), acceleration (slow to fast), response speed (slow to quick). these three settings are adjusted automatically based on the car's interpretation of the driver's driving style, or they can be manually overriden. i have never changed these settings. post-incident i checked the setting and it was set to based on driving style with acceleration=fast. concerns: is driving assist to easy to inadvertently activate? should driving assist not activate at very slow speeds and not auto-set to 30k/h? why did forward collision-avoidance not activate? drive assist should not default to based on driving style.

Hyundai ioniq5 acquired new in september 2023 - mileage at the time of incident 10,800 miles - michelin primacy as 235/55 r19 - oem tires installed by the manufacturer. front tire started to go off balance causing steering wheel vibrations and shaking that increased with speed - car was not drivable above 55mph due to excessive shaking and vibrations of steering wheel - this presents safety concern as it may lead to loss of control and excessive wear and tear on other suspension / wheel components. i took the vehicle to a local tire shop (town fair tire in norwalk ct - authorized dealer of michelin tires) - got wheels rotated, balances and alignment adjusted. the issue persisted - on the second visit tire shop dismounted one of the tires and discovered internal foam band unglued and clumped on one side of the tire causing off-balance. the shop recommended removal of the foam material and rebalancing of the tire to correct the manufacturing error. i contacted hyundai and reported this as a safety issue as well.

Michelin primacy as 235/55 r19 - oem tires on hyundai ioniq5 acquired new in september 2023 - mileage at the time of incident 10,800 miles front tire started went off balance causing steering wheel vibrations and shaking that increased with speed - car was not drivable above 55mph due to excessive shaking and vibrations of steering wheel - this presents safety concern as it may lead to loss of control and excessive wear and tear on other suspension / wheel components. i took the vehicle to a local tire shop (town fair tire in norwalk ct - authorized dealer of michelin tires) - got wheels rotated, balances and alignment adjusted. the issue persisted - on the second visit tire shop dismounted one of the tires and discovered internal foam band unglued and clumped on one side of the tire causing off-balance. the shop recommended removal of the foam material and rebalancing of the tire to correct the manufacturing error.

12 volt battery dies after 2 years. car is not starting and could stop working if it dies while being driven. the dealer replaced it but does not know why it died. i called the manufacturer but they were no help either.

Suspension came through the top of casing hitting the hood after going over a minor pothole.

See attached document for complaint.

The recall stated in this report says that it was incomplete, however the recall was completed by the hyundai dealership, the software updates were installed and the iccu failed anyway. when the unit failed the car went into "turtle mode", only able to go a max of 25 mph, and the 12 volt battery drained and died.

Due to an extreme failure in the integrity of the oem tires, the vehicle experienced violent shaking a speeds in excess of 45mph. the shaking resulted from the extreme unbalanced nature of the wheels due to displaced noise-isolating foam inside the tire. as these tires were installed when the new vehicle was purchased, there is a significant issue with the fact that none of the dealership service stations visited to address this issue could identify a problem. additionally, all three dealerships refused to work on the tires or help address an obvious problem for a vehicle with only 6,400 miles. while the warranty for the tires lies with michelin, the complete lack of response or care by hyundai representatives on a component with such a high failure rate is extremely unnerving and problematic.

On [xxx], while driving north on [xxx] to michigan, i stopped in carmel, in to charge my 2023 hyundai ioniq 5 se rwd vehicle. after charging, i reached 45mph and immediately experienced violent shaking of the steering wheel and seats. the vehicle was immediately driven to hyundai of carmel for inspection and possible maintenance. a service technician drove the vehicle and experienced the issue, but could not recommend a solution. the vehicle was driven back to louisville, ky (home location) and taken to a tire discounters the following morning. at tire discounters, a technician drove the vehicle and experienced the same behavior, but could not provide a solution. numerous trips to multiple hyundai dealership service departments and tire service centers (big-o-tires and tire discounters) resulted in no solutions. after extensive research, a potential solution was identified by the vehicle owner relating to the noise-isolating foam located on the inside wall of the tires. there are numerous reviews on michelin's website documenting this specific issue with the tires. a call to michelin costumer service successfully concluded with a warranty claims number. however, none of the previously mentioned tire service locations would investigate because the vehicle only had 6,400 miles and the hyundai dealership service departments refused to address the problem. ultimately, pep boys accepted the michelin warranty claim and found that three of four tires (michelin primacy 235/55r19 101h) that came as part of the original vehicle purchase had the internal isolation foam disconnect from the tire belt and gather in a central location inside the tire. there has been no evidence of notices or information from michelin to dealerships or service departments regarding this issue and the potential for dangerous driving conditions or damage. information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6)

Battery will not stay charged, car has to be jumped every time it's driven. also sometimes the car turns off when it put in gear with a 12volt warning.

Power limited message show when driving on highway then drop the speed and stop need to turn off the car and turn back on the everything back to normal. so scary

Our all-electric awd hyundai ioniq 5 has an issue where the rear motor electric oil pump (eop) overheats and ceases to function when the problem occurs, which disables the rear motor and effectively causes the car to become a front-wheel drive vehicle with a "hesitation" in the acceleration. this problem only occurs after a long time of high-speed driving and typically on a warm day (upwards of 70-80 degrees f). when the problem occurs, the rear motor ceases to function at all and only the front motor operates to power the vehicle forward. the acceleration is also impacted, such that when the accelerator is pushed, the car "hesitates" for 1-3 seconds before the front motor takes over the demand for power and "lurches" the car forward in a jerky motion. the symptom will last as long as the car is in an overheated state. however, if you pull the car over and let it rest for a period of time (undetermined), the rear motor will again operate normally until it overheats again. for us, this occurred once on a very hot day traveling approximately 50-60 miles on interstate travelling at speeds over 70 mph. on another occurrence, it happened after driving the car about 200 miles (stopping for a lunch break in the middle), for about 4 hours. when this problem occurs in other cars equipped with rwd only, they lose all forward power in the car and coast to a stop even when the battery still has a charge. we've taken it to our local dealership for repair on sept 12, 2024 (mcgee hyundai of barre, vt) and they claim that there is nothing wrong with the vehicle. after researching the topic, i've determined it is the failing rear eop must be replaced [xxx] and [xxx] information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6)

It is regularly very difficult to see the digital speedometer on this car because it is blocked by the steering wheel. there is almost no comfortable position to place the seat and steering wheel for someone of my height 6ft where the speedometer is visible. please make hyundai move the speedometer to the middle of the screen (not outside edges where it is blocked by the steering wheel)!! i have contacted them and they have essentially gaslit/ignored me about this.

When approaching 60 mph the vehicle starts to vibrate / shake. upon a dealer's recommendation they have rotated, aligned, balanced and changed the tires and repaired the rear rims, but they did not help. (just cost us money). i contacted hyundai and they suggested that i go to another dealer, which i did. they said it was a known issue and the there is nothing they can do about it. i can't say much about the safety aspect, but i'm sure it's not good when a car vibrates and no on seems to know why ...

During normal driving with car charged to 95%, i heard a pop coming from the rear of the vehicle and saw an immediate warning about electrical system malfunction. i drove the car for less than a quarter mile and pulled over. i then received instruction on the dash to power off the car which i did. the car was towed to the dealership who diagnosed an iccu failure. it had been to the dealer twice for safety recall notices related to the same issue. this is a known problem with this type of vehicle. awaiting replacement parts. this problem will cause complete loss of power to the vehicle. fortunately i was able to pull over and park in a safe space before this happened. obviously complete loss of power is a potential safety issue, thankfully systems alerted me to the problem. i have no idea if the replacement part will be of the same lot that failed in the first place.

The contact owns a 2023 hyundai ioniq 5. the contact stated while driving at an undisclosed speed, the vehicle lost motive power with several unknown warning lights illuminated. the vehicle was towed to the dealer. the vehicle was not diagnosed or repaired. the manufacturer was made aware of the failure and a case was opened. the approximate failure mileage was 6,500. the vin was not available.

There seems to be a wide spread issue with the foam on the interior of ionic 5 tires, michelin 235/55/r 19. the foam dislodges from the interior of the tire and causes severe vibrations when driving at over 60 mph. the issue causes the tires to be unbalanced and can cause damage to the car. wondering why michelin doesn't address this issue and issue a fix other than stripping the tires of foam. my hyundai dealer told me this is an on going issue and they have received no guidance from michelin or hyundai.

Vehicle disengaged lane keeping adas without warning multiple times. sometimes a warning beep would occur, but often on turns it would suddenly disengage without a beep or any other warning method causing me to have to yank the wheel to complete the turn correctly and avoid running off the road. this has caused me to not trust the system and fight the lane keeping feature just in case it suddenly turns off and goes into the other lane before i have a chance to correct the steering.

The lower control arm broke off of the subframe during daily commute on the highway, which left the car completely immobilized and had to be towed. the incident could've been a lot worse if i had lost control of the car and swerved into others on the road. vehicle is currently being inspected by hyundai dealership. prior to the incident, there were no warning lights or symptoms.

Car lost power due to electrical supply--12v/iccu failure. warning on dash instructed me to stop vehicle immediately. car is currently at dealership and inoperable.

I started my car and after a minute i received a warning saying to check my electrical system and safely pull over. after 5 minutes of trying to drive to the dealership the car suddenly slowed down to a max speed of 27mph and then shortly after slowed to a stop and turned off. the car would not turn on and eventually the 12v battery died. i tried to jump the car but the 12v would not stay charged long enough to put the vehicle into drive. it appears the iccu is not working and cannot keep the 12v charged to make the car function .

My new 2023 ioniq 5 became inoperable on 3 occasions when it completely lost power. this situation unquestionably impaired my safety on the first occurrence of power failure that happened without warning while i was driving; fortunately, i was able to coast to the side of the road without incident. in my repair visits to hyundai dealers, the integrated charging control unit (iccu) updated (twice) and the depleted 12-volt battery was charged. repair visits resulted in loss of use of my car for a total of 31 days while it was in service. the 12-volt battery finally had to be replaced on the last dealer visit because it had could not hold a charge. the battery was barely a year old. no hyundai dealer could assure me that the problem with the charging system was resolved. it was suggested that annual replacement of the 12-volt battery before the end of its normal lifespan might be required to avoid the serious safety risk of power failure while operating the vehicle. hence, i am not driving my car with confidence that the safety risk risk was alleviated. i understand that hyundai motors acknowledged the iccu problem and addressed it with a new iccu in the 2025 ioniq 5 model year. however, in my case, i have a still-new, expensive vehicle that i drive without feeling 100 percent secure that i am safe.

The iccu failed, leaving the car with a check electrical system failure and ultimately cutting power to the vehicle, forcing driver to pull over and stop.

We were driving our vehicle in a parking lot while on vacation and we got an error message “check electric vehicle system”. it then displayed the error message “stop safely and check power supply”. four months ago, we had the same problem and had our 12 volt battery replaced and our iccu updated. our vehicle lost power while we were driving. we were able to drive the car safely to a hotel. but the iccu needs to be replaced.

I was driving the car 70 miles per hour in a highway. car suddenly stopped and only go 5 mph. i was lucky no car behind me. if not i could be death today. i brought it to service and iccu unit failed which is happened almost all hyundai ioniq 5. they replaced it with same iccu and it will happen again. i think they want me to make an accident next time. this car is not safe to drive with this charging unit.

I was sitting in my parked vehicle, which i had just turned on. it was cold so i turned on the seat warmer. about a minute later, i hear a pop and saw a “check electric vehicle system” warning on my dash, followed by an audible alarm and a new “stop vehicle and check power supply” warning on the dash. i decided to have the vehicle towed to my local hyundai dealer.

While driving on a 45 mph speed limit road, there was a "pop" noise and then alarms on the dash display that power was limited and stop the car. the car's speed was severely limited to about 10 mph for a few seconds while i pulled the car over, and then the car died. everything was electrically dead. i couldn't even turn on the hazard lights or lock or unlock the car. i took a video of the dash display rapidly alternating between two alarm messages, "12v battery storage low. stop safely." and "power limited." this website wouldn't let me upload the video, so i saved screen shots of the two alarm messages from the video. shortly after i stopped the car, it all went dead. it scares me to think what would have happened if i had been on the interstate when this occurred.

The rear video camera fails intermittently. it works sometimes and doesn't at times. the same with the rear cross traffic warning and pedestrian warning. i've taken my car to the dealer service center but they claim to not being able to reproduce the issue. i know the issue still exists since my husband hit a parked car while backing out of a driveway since there was no alert provided and the rear camera did not work.

Several days ago, the twelve volt battery on my car was replaced because the car just suddenly died overnight while sitting in my garage. they told me that the battery needed to be replaced when i went to the dealer. they replaced it and now less than a week later, i was driving on the highway and suddenly the car slowed to no more than 27 miles an hour with warnings about the electrical system not working and a problem with the battery. i had to put my flashers on while i was driving down the highway until i was able to pull off and have the car towed to another dealer that was closer to the scene. not sure what they are going to say, but obviously this was very scary as well as a nuisance.

The car has had multiple recalls for the iccu failure. i have brought the car in been 3 times. will go in again this week . the recall remedy never fixes the issue. the car works for a few weeks then the same issue happens again .unable to start the car or drive . has been going on since june 2024.

Hyundai service department confirmed the iccu needs to be replaced but is on back order for 5-6 weeks

The manufacturer sent me a letter about a recall and in the letter stated that this should be fixed promptly because the defect could increase the risk of a crash. i called my local dealership and they could not provide me with an appoinment for 3 months. when i told them that i was worried about risk of crash they dismissed that and told me that they had not heard of a crash from this problem. i called hyundai and filed a complaint, case #[xxx]. they also called the dealership and they could not get a sooner appointment but they offer for me to drop the car off and leave it for 7-10 days and they would get to it when they could. they would not give me a loaner car, that would be at my expense. i feel that this delay could potentially cause me to have an accident and injure myself and possibly others. in order to get it done sooner it would cost me a rental car. this repair is supposed to be done in a timely fashion and at no expense to me. hyundai could not resolve my issue. the local dealership is crown hyundai in st petersburg fl where i purchased the vehicle. information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6)

Our 2023 hyundai ioniq 5 went completely dead on the evening of [xxx]. there were no warning signs/messages prior to it. it just would not start and none of the electrical systems (dashboard, lights etc) worked either. we became aware of the recall involving defective iccu causing depletion of the 12 volt battery. we called nearby dealerships but their service departments were closed because it was the weekend. on monday january 13, 2025, we were able to get in touch with the hyundai dealership in el monte, ca. their service personnel instructed us to jump start the car and bring it in for service, which we did around 8am the same day. around 2:30pm, we received a call from the el monte dealership saying that they are not able to address the issues with our car because the dealership who sold us the car (garden grove hyundai), had installed/wired a non-factory-certified gps device (lojack) into our car (unbeknownst to us), which was interfering with troubleshooting. the el monte service person recommended that the car be transferred to the garden grove hyundai dealership. he also stated that he would not recommend driving the car to the garden grove dealership since it may pose a safety risk. he said that it's possible that the car may suddenly die without warning while we are driving. we spoke with hyundai roadside assistance, hyundai customer care, and then the garden grove dealership, only to be told that it is not their responsibility to transfer the car, despite it being a safety risk to drive the car. the garden grove service person kept insisting that it's safe to drive the car and to just drive it over, which made us extremely uncomfortable. nobody has taken ownership/responsibility for what has happened and the customer service has been awful. we have wasted the entire afternoon of january 13, 2025 being on numerous phone calls with no resolution in sight. information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6)

There was no major safety issue in this instance. my concern is this poses a severe risk if it happened while driving. the car was on and in ready to drive mode but was parked in the garage with climate control on while loading it for going to school. at somepoint between trips to the car over 20 minutes it died with no warning. some lights behind buttons, the interior lights, and the screens were on but blank. not a single button in the car would respond. including hazards or opening the trunk or closing the charging port door. lights like the led for the overhead light button blinked and the charging indicator by the charging port blinked a pattern of 1 longer flash and 8 shorter flashes. the car would not shut off or on again another button that was completely unresponsive. the lights and screen stayed on for at least 30 minutes before i left with a lyft to get the kids to school. an hour and a half later everything was off and it seemed to have no power. at that point i did figure out how to jump it and get it to the dealer. the dealer claims the 12v battery died and that was the only issue and completed the 2 open recalls. there was no indication when i started the car that anything was wrong or the 12v battery was low or needed replacing. there are apparently no error codes from it completely failing while in ready mode. i was only told this happened because it was in park and the 12v battery failed while it was on and parked, if i had been driving i would still have use of the vehicle as the recall outlined for a failed iccu when the 12v battery drains. they can find nothing else wrong but my concern is that a failed 12v battery could cause this while driving. i was told simply it cannot happen because the software handles it differently when driving. i hope that is correct.

Iccu failed while charging. vehicle showed no diagnostic codes to indicate the problem. all recent recalls regarding the iccu performed on the vehicle.

Iccu failure. hyundai may be trying to hide data as they are not processing this as a recall but just as a warranty service. battery light turner on and car went on a crawl mode. i had the car towed to dealer and they confirmed it needed a new iccu. my new 3 month 12v. battery was ruined and they refused to replace as it was not from factory. this is my second 12v battery in one year. after replacing the iccu, the fuse blew. please see that hyundai is not hiding crucial data from the public

After an iccu recall was mitigated, vehicle charging failed before achieving requested charge level. i asked for 80% and i noticed that it only charged to 72%. after driving for a few minutes, vehicle appeared to enter limp mode and then the 12 volt battery died disabling the vehicle. i had to provide an external 12 volts in order to get the vehicle back into my garage so i could notify the dealership. dealership indicated it would be about 6 weeks before the car could be diagnosed, let alone fixed.

This car has had several recalls. on 12/9/24 i brought it to dealer re the iccu update. apparently what was done was just a software update. on 1/8/25 while driving 50 mph, the car suddenly lost power in traffic. flat bedded to the dealer, they had to replace the iccu. todays consumer reports states that the iccu recall was to replace the iccu. clearly the software update or check failed, putting me and other motorists at risk that night. i always thought a recall was a repair/replace situation, not an update/check situation. being told by the service mgr that after all, it's a $3000 part, so if it's ok they don't just replace it. huh? what? not replacing it as a recalled problem is a problem. their software update failed clearly, and now i'm afraid to use the car other than locally. the warning lamps came on only as soon as power was lost and slimply said "check electrical system". no warning before the event. i think the manufacturer's solution is a non solution, ineffective and dangerous to the motorists. in addition, i got the 4 or 5 recalls already on this car i've had for under 2 years now from my insurance company, not from hyundai. what's with that? i would be happy to speak with someone about this. i've called the manufacturer and they read to me off of a script.

I was pulling into my driveway and i heard a "clunk" and then an error appeared on the dashboard saying "check electric vehicle system." my 12v battery then died. after recharging the 12v battery with an external charger, the "check electric vehicle system" message came up again when i started the car, and i could only drive a block or so before another message on the dashboard said "stop vehicle and check power supply." i had the vehicle towed to a hyundai dealer where it is waiting for them to diagnose the problem. i had all of the iccu software update recalls performed on the vehicle before this latest problem occurred.

Condensation builds in front of the camera. the car starts jerking all over the road with no warning. there is no error other than noticing that the car cannot keep itself in the lane. when trying to disable the features, they get turned back on automatically.

There is a known issue with the iccu fuse. mine blew this morning while driving and vehicle went into limp mode. max speed is 20 mph and this is not safe on the highway. vehicle completely died because the 12v can’t be charged with the blown fuse.

June 2023 - 12 volt battery discharged overnight on consecutive nights. dealer service eventually claimed that the problem was the navigation head unit was faulty and continued to draw current after the vehicle was turned off. the process took over 4 weeks to remedy since the necessary part was unavailable. january 2025 - while driving, a warning to stop the vehicle and check the power system appeared. after a few minutes the vehicle lost power and went into "limp home mode" which limits the vehicle to 25 mph. this problem was attributed to a failed iccu. however, due to lack of availability the vehicle has been in the service department of the dealer for 3 weeks (jan 17,2025 to feb 4, 2025). the dealer estimates that it will be at least feb 14, 2025 before the car can be repaired. while these two incidents may be unrelated, the result has been the same: the 12 volt battery does not stay charged up rendering the vehicle unusable. for drivers and passengers it is unsafe to operate the vehicle when speed is limited to 25 mph. i understand there is a recall on this part, but hyundai's lack of support for providing replacement parts in a timely manner is causing owners of these vehicles to continue to drive them until the part actually fails which often happens at an inopportune time.

Car stopped driving. got a check power systems error and car went into limp mode then stopped altogether

My vehicle will not charge with my chargepoint home charger. it only charges on a dc high capacity charger. i have completed all of the recalls at the dealership where i purchased the car. the service manager told me the vehicle is unsafe to drive. it has been at the dealership for two weeks while waiting for a backordered iccu. the repair will take place upon receipt of the part. i have no faith that the repair will work. in any case i am now afraid to drive the vehicle even if the dealer says it is repaired.

Have had 2-12v battery issues and now an iccu failure with about 28 days at the dealership with no parts to repair. seems to a common issue popping up

The 12v battery had zero energy after an overnight charge of the hv battery. the car was driven yesterday for 400 miles and three dc charge events. the car was plugged into my level 2 charger at 11 pm and it charged the hv battery to 100% overnight. today, i was able to unlock the car electrically, but that appeared to be the last action the 12v battery could perform. all displays were dark, i could not start the car, and the emergency flashers would not work. the hv battery was at 100% from the overnight level 2 charge because the indicator lights by the charger were all lit and when i applied a jump pack to the 12v battery, the dash indicated 100% battery level. i was able to put the car in neutral by applying the jump pack to the 12v battery so the car could be pulled up the flatbed tow truck. this car has had all recalls performed. please open a new investigation regarding the iccu failure because it is clear from the data that hyundai has not resolved the problem.

While driving the vehicle on a local road at around 40 mph, check electrical system light came on and i heard a pop sound behind me. the vehicle would suddenly go no faster than 30 mph. upon further driving, for additional quarter mile, it would drive no faster than 12 mph. i was able to very slowly drive it 1.5 mi back home. once i arrive home, the vehicle was no longer operational. i confirmed that the 12-volt battery was at an extremely low charge and having the vehicle on would not charge the 12 volt battery. i believe the iccu failed. i am waiting for hyundai to further diagnose this.

Iccu error, check power source error then all electrical in the vehicle went out. no power steering, no acceleration, anll screens went black, all recalls addressed.

I took my hyundai ionqi 5 electric set awd in for two recalls. after picking up the car, i left the car dealership and merged onto the highway. within 1-2 minutes after i left the dealership, the dashboard was flashing red circle with an exclamation point that said the electrical system was low. i could no longer accelerate. i proceeded to move to the right with traffic traveling 60-70 mph. i was extremely scared as i tried to drive on the side of the road. i had to turn on my flashers to get to the next exit. i was going about 20-25 mph. as i tried to go back to the dealership, it died in an intersection. again, i was concerned about my safety with my car unable to move. i had the car towed back to the dealership. they said it was the 12 volt battery, but when they looked further they said it was the integrated charging control unit (iccu) which wasn't working. the dealership said that they checked the 12 volt battery and the iccu when they finished the recalls and everything was ok. that doesn't make any sense when everything dies within 1-2 minutes. then the dealership said they would not be able to get a part until the end of march.

After taking 2023 hyundai ionic5 in three times due to recall notice for iccu software update over the course of 18 months, iccu still failed causing complete loss of power. car has less than 5,000 miles on it. have been told no estimate available on time it will take to get part replacement. could be months.

Iccu fuse blown. most likely the iccu failed. getting it towed now.

After having recall service of iccu applied, the symptoms that initiated the recall surfaced. i had not driven 200 miles before i received a warning that the electrical system needed attention, followed by a warning the battery (12volt) had an issue and to stop driving. on top of that, the car will not accept a charge.

On [xxx], i was pulling into my driveway when i heard a loud “clunk” and an error message came up on the dashboard saying “check electric vehicle system.” i checked the 12v battery which was at 11.9 volts, so i first tried charging it with an external battery charger. however, the error message still came up, and when i tried driving on my street it was limited to 25 miles per hour, and eventually i got the error “stop vehicle and check power supply” and the car slowed to a crawl. there was no warning prior to the failure. i had the latest iccu software update recall performed at capitol hyundai in san jose, ca on december 30, 2024. the next day, i had the car towed to capitol hyundai; a week later they diagnosed the problem as a blown fuse and iccu failure. there is no estimate on when they will receive a new iccu part to repair it. information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6)

While driving my car in a high traffic area, it stopped working. completely stopped. it would not accelerate whatsoever and i was forced to stop on this busy street, luckily right past an intersection. this is a known problem with this vehicle. yes there is a recall on the car but getting scheduled to have the recall done has been a very long process with me being told it would be months to fit me in.

Iccu failure resulted in a loud pop and then loss of most power. was still able to move the car but was limited to ~22 miles per hour. had to be towed to the dealer. tow and service from the dealer is pending, but my understanding from talking to service is that this is a relatively common issue and will require replacement of the iccu unit. the car has had multiple recalls to attempt to address this issue preemptively including a little over a month ago. there were no issues reported at that the time of those recall services. incident occurred without warning. after the pop and loss of power electrical and service warnings popped up all over the dashboard.

My horn has quit working. i don’t use it often do it could have been broken for more than 6 months, but i just discovered it following the service for a number of recalls. apparently, this is a common problem. in 41 years of car ownership and driving, this is a first for me. my car just passed 50,000 miles last week and i’m afraid it might not be covered under warranty.

While running errands, my ioniq 5 suddenly made a pop sound, and the dashboard displayed a “check electrical system” warning, followed by a loud alert and a message instructing me to “stop vehicle and check power supply.” i was able to safely park in a lot and called for a tow. at that point, the car was still operable, but after being unloaded from the flatbed, it would no longer turn on. the issue was diagnosed as a failed iccu, and i was informed it will take one month to receive the parts and complete the repair. had this failure occurred on a highway or busy street, it could have been extremely dangerous. i am fortunate that it happened in a safe location.

Iccu failure resulting in car being undriveable. warning lights appeared, so towed the car to the dealer. dealer confirmed iccu failed and accompanying fuse also broken. new parts on back order for over a month now.

The first time the "aux" battery was not charging completely. 2nd time pretty much same issue, they claimed to have performed a software update, 3rd time warning lights came on "problem, check electrical system" ..something like this. they told me to bring the vehicle to the dealership. after reading the problems stem from the iccu, i decided to call them to ask if i should tow it in, due to all the warnings. after this we could not even get into the vehicle or drive it. took us and the tow driver 4 attempts to get it out of the garage, down driveway and it had to be pulled onto the flat bed. they agreed and said that if there were any tow fees, they would pay them. furthermore they said they would supply a vehicle to use while mine was being repaired. this was on jan 25th, they still have not returned my vehicle, claiming they are waiting on parts, i've had to call them to check on it, this week no contact what so ever.

Iccu failed during driving car could not go over 12 mph for about 10 minutes and then failed completely no estimated time for delivery of part totally unusable

The car made a loud popping sound as i was driving and then error messages appeared on my dash saying "check electric vehicle system" and "stop vehicle and check power supply". the car was slowed down to 20 mph on a 45 mph road and i pulled over to get out of traffic. luckily i wasn't far from home so i drove back very slowly. i had the car towed to the dealership and they have indicated that the iccu failed and needs to be replaced, but they don't have any available until possibly 4/1/25. there were no messages received prior to the failure.

Upon attempting to merge onto a highway, the vehicle lost acceleration and a warning message appeared on the dash stating "stop vehicle and check electrical system". car speed was limited to 28 mph. i was able to exit and get the car to the dealership. this was on january 29th, 2025. car was finally returned to me with a new iccu on march 19th, 2025.

Iccu failure, loud pop sound and then a "check electrical system" then after a minute a turtle icon and the car slowed down and stopped on its own in the middle of a freeway. hyundai towed it and waiting for repairs. this was highly dangerous stopping in the middle of the freeway with no control over the vehicle and fast cars driving by.

Car had 2 recalls and a diagnostic on 3/12/25. all checked out ok. it has 9,630 miles. 3/19/25 after driving 4 times throughout the day, it would not start or unlock. roadside assistance jumped the 12v battery and drove it home. drove it yesterday fully charged and worked. then it would not start this morning. dealer advised it was unsafe and to have it towed to dealership because they had another case where person was driving same car on the highway though and the car died. please advise what my rights are for addressing this safely.

On march 20, 2025, my 2023 hyundai ioniq 5 displayed the error "stop check vehicle power supply" and abruptly shut down during rush-hour traffic, leaving my young son and me stranded on a heavily congested bridge. immediately, the car’s display went dark, doors wouldn't unlock, and the gear shifter was immobilized. with no emergency functions available, we were completely trapped. on a slight incline, i had to continuously hold the brake pedal to prevent rolling forward into increasingly aggressive traffic, making an already frightening situation terrifying for my child. police arrived but struggled to assist preventing the car from moving. after several tense minutes, the dashboard briefly flickered back on, enabling me to unlock the doors. aaa identified a dead 12v battery, replaced it at my expense, but the critical error persisted, causing another complete shutdown shortly thereafter. the vehicle was towed to hyundai of bedford, where technicians diagnosed the issue as a failed iccu and fuse, parts that are now backordered due to high number of vehicals having this same issue. alarmingly, hyundai plans to replace these faulty parts with identical models, despite my vehicle having completed all recall updates. this means the dangerous malfunction could occur again without warning, posing ongoing severe safety risks to my child, myself and those around use. this deeply traumatic event exposed critical vulnerabilities in the hyundai ioniq 5, especially dangerous for families, elderly drivers, or anyone caught in similar emergencies. the absence of functional basic safety measures left my son and me unnecessarily vulnerable. my trust in this vehicle and any thing using the same iccu is permanently broken. hyundai urgently needs reliable, redundant safety systems to prevent such life-threatening scenarios. until then, we cannot feel safe or secure in these vehicles.

After all of recall software updates were applied the iccu still failed with no warning beforehand and resulted in power and propulsion failure.

The contact owns a 2023 hyundai ioniq 5. the contact stated that the recall repairs for nhtsa campaign number: 24v868000 (electrical system) and 24v204000 (electrical system) were completed; however, the repairs failed to prevent a failure from occurring shortly afterwards. the contact stated that while attempting the charge the hybrid battery, the vehicle failed to charge to full capacity as intended. in addition, the contact was alerted by the vehicle with a voice message that the vehicle had failed to charge as intended. no warning lights were illuminated. the vehicle was taken back to the same local dealer where it was reprogrammed; however, the failure reoccurred. the contact was advised that the iccu needed to be replaced; however, parts were not available. the manufacturer was notified of the failure and referred the contact to the nhtsa hotline for assistance. the failure mileage was approximately 16,307.

Used the remote climate start which was working when i went out to the car. the car let me in; but would not respond to start until finally the dash lit up with a lot of electrical system warning lights. the dash then went dark and the car would not respond. i was locked out and had to use the physical key to reenter the car when i got out to check to see if the lights were on. i had it towed to the dealer where an iccu failure was diagnosed. the replacement iccu is on back order with no eta. they do not have any loaners available and hyundai corporate customer service has been giving me delays refusing to say if they will reimburse me for a rental. had previously done all the software updates and inspections at the dealer for the recalls for the iccu.

The car was parked and off. i turned the car on. it started normally. just before shifting to reverse to leave, i hear a loud "pop" sound from under the rear seat area. a yellow "check electric vehicle system" warning appears on the dashboard, with a battery warning icon. about 30 seconds later, a red "stop vehicle and check power supply" warning appears with an alarm/chime. i have completed all iccu recalls and any other recalls on the vehicle. i had just dropped my son off for a preschool trip. i am grateful i was not driving with him when this happened as the car becomes inoperable.

On march 15, i pulled my car into a charging station and turned it off. the charger would not recognize my car, so i figured i'd pull into a different charger. however, when i tried to start my car to move it i got the dreaded low voltage warning. the car would not start, and even when a tow truck brought a 12v charger it would not jump. it was completely dead. it had to be dragged with chains onto a tow truck. it was brought to a dealer where it has been ever since. i have just been informed by hyundai corporate that the car needs a new iccu but that they are backordered. this is the second iccu issue i have had with this car. the first was on december 26 when the issue was a recall [that i had not been made ware of yet] for a software update. i believe a fuse and the 12v battery were also replaced as the 12v completely discharged from the failure. on this occasion, the vehicle was dead in my driveway. i consider myself fortunate that the car did not die on a highway or while i was actually driving it, because that is very dangerous. but this car is not reliable and i feel like hyundai should be buying back the lease and putting me into a different vehicle.

1. what component or system failed or malfunctioned, and is it available for inspection upon request? the electric vehicle system appears to have failed, preventing the car from starting and staying on. even after attempting to jump the 12v battery, the vehicle would briefly turn on and then immediately shut off. this issue was previously confirmed by the dealer about four months ago, and they supposedly fixed it. however, it has now happened again, leaving the car completely inoperable for the second time. the vehicle is available for inspection upon request. 2. how was your safety or the safety of others put at risk? this failure left me completely without transportation for the second time, which is a serious reliability and safety concern. if this had occurred in traffic or in an emergency situation, it could have posed a major risk, as the vehicle is unable to move at all. additionally, because this issue has recurred despite prior repairs, it raises concerns about the reliability of the vehicle’s electrical or power management system and the effectiveness of past fixes. 3. has the problem been reproduced or confirmed by a dealer or independent service center? yes, the problem was previously confirmed by the dealer about four months ago, and they claimed to have fixed it. however, the issue has returned, meaning the original repair did not fully resolve the problem. at this time, it has not yet been re-inspected for the second occurrence. 4. has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? the dealer inspected the vehicle during the first occurrence four months ago. however, for this second occurrence, it has not yet been inspected by the manufacturer, police, insurance representatives, or other authorities. 5. were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? yes, multiple warning messages and symbols appeared on the da

These cars had an open campaign earlier in the year to check for faulty iccus. mine was check in jan and deemed to be good. in early feb i was driving home alone late at night and suddenly i was unable to go faster than 20mph and in a matter of minutes the car shut off. it had to be towed and the dealer informed me the iccu failed. it was very scary and extremely dangerous. this has been happening so often with the ioniq 5's and there should be a mass recall.

Was driving in bellevue, wa leaving a parking lot. heard a "pop" sound, and immediately had a "check electrical system" warning come up on the dash. from previous experience in 2024, was aware this requires immediate dealer inspection, so started driving to the dealer 6 miles away. after less than a mile, lost most power but was able to drive slowly into an office parking lot. called hyundai roadside assistance who sent a flat bed tow truck to transport the car to the dealer. iccu was replaced in may 2024 after similar symptoms. the current iccu (which is likely the failed component) was in service for less than a year.

My ioniq 5 has encountered the renowned "iccu" failure -- 35k miles in, 2.5-3yrs of ownership. i had a loud 'pop' noise behind my driver seat occur and then my vehicle went into limp mode. the iccu failure is confirmed by the dealer, but the part is on massive backorder nationwide...

My electric car lost power while driving with no warning. it came to a stop in the middle of the road and a message came on the screen that said "stop vehicle and check power supply". there was no advanced warning and i had to have the vehicle towed to the dealer. upon inspection by the dealer i was told the iccu unit failed and needed to be replaced. the dealer stated the the part was on backorder and there was no eta for the part. thankfully i was not driving on the freeway or i may not have been able to get the car to the shoulder. it was a very scary thing to lose all power in the middle of the road.

On june 8, 2023, the office of defect investigation (odi) opened pe23011 to investigate allegations of loss of motor power on model year (my) 2022 hyundai ioniq 5 vehicles. some consumers reported loss of motor power immediately after a warning lamp illumination or reduction of motive power while the vehicle was in motion. this investigation found that the integrated charging control unit (iccu) may be subject to various conditions such as overcurrent, overvoltage induced at the end of charging, and certain thermal loading during operation that can damage its internal components and open the iccu fuse, resulting in an inability to charge the 12-volt battery. the vehicle could eventually lose all motive power, increasing the risk of a crash. in july 2023, hyundai issued a service campaign to address certain my 2022-2023 ioniq 5 and my 2023 ioniq 6 vehicles that may have low 12v auxiliary battery charging occurrences due to an iccu fault and may set the dtc p1a9096 “dc/dc converter input voltage sensor fault”. on march 15, 2024, hyundai filed safety recall 24v-204 for 98,878 my 2022-2024 hyundai ioniq 5 vehicles and my 2023-2024 hyundai ioniq 6, genesis gv60, genesis gv70 “electrified” and genesis g80 “electrified” vehicles. the recall remedy provides an inspection, and if necessary, a replacement of the iccu and the associated fuse. the iccu software reduces the risk of overcurrent and implements voltage peak reduction at the end of ev battery charging. the recall also includes a software update that revises the electric water pump operational threshold to reduce thermal loading during charging and driving. in view of the recall action being taken by hyundai, odi is closing this preliminary evaluation. the agency reserves the right to take additional action if warranted by future circumstances. to review the reports cited in the closing resume odi report identification number document, go to nhtsa.gov.

On june 8, 2023, the office of defect investigation (odi) opened pe23011 to investigate allegations of loss of motor power on model year (my) 2022 hyundai ioniq 5 vehicles. some consumers reported loss of motor power immediately after a warning lamp illumination or reduction of motive power while the vehicle was in motion. this investigation found that the integrated charging control unit (iccu) may be subject to various conditions such as overcurrent, overvoltage induced at the end of charging, and certain thermal loading during operation that can damage its internal components and open the iccu fuse, resulting in an inability to charge the 12-volt battery. the vehicle could eventually lose all motive power, increasing the risk of a crash. in july 2023, hyundai issued a service campaign to address certain my 2022-2023 ioniq 5 and my 2023 ioniq 6 vehicles that may have low 12v auxiliary battery charging occurrences due to an iccu fault and may set the dtc p1a9096 “dc/dc converter input voltage sensor fault”. on march 15, 2024, hyundai filed safety recall 24v-204 for 98,878 my 2022-2024 hyundai ioniq 5 vehicles and my 2023-2024 hyundai ioniq 6, genesis gv60, genesis gv70 “electrified” and genesis g80 “electrified” vehicles. the recall remedy provides an inspection, and if necessary, a replacement of the iccu and the associated fuse. the iccu software reduces the risk of overcurrent and implements voltage peak reduction at the end of ev battery charging. the recall also includes a software update that revises the electric water pump operational threshold to reduce thermal loading during charging and driving. in view of the recall action being taken by hyundai, odi is closing this preliminary evaluation. the agency reserves the right to take additional action if warranted by future circumstances. to review the reports cited in the closing resume odi report identification number document, go to nhtsa.gov.