Hyundai Ioniq 5 2022: Retiros, Quejas y Ley de Limón de California

Upon starting the car, it made an audible "pop", and the dash indicated to check the 12V power supply and "low available power" with a turtle indicator, and an "EV!" warning lamp. The car struggled to accelerate out of the parking lot, and within a minute, the dash displayed a "power failure" message, and the car lost all ability to accelerate while on the road, forcing an emergency pull-over. The 12V system completely failed while waiting for a tow truck, complicating the already poorly-documented and complicated process of disengaging the vehicle's automatic parking break for loading onto the flatbed trailer. The dealership performed diagnostics and confirmed an ICCU failure. After waiting for parts and technician availability, the ICCU was replaced with part number 36400-1XAA0-AQQH "ICCU Assy" and returned to me 32 days later.

NHTSA #11728749

Car gave a "electrical error" message and would no longer charge at any charger. It slowly lost power and eventually stopped driving fully on the highway. The dealer says the ICCU is responsible. I inquired if this recall was not fixed already, they said it was but can still happen and the ICCU is not resolved truly, the software is just a temporary fix according to them. The vehicle will need a new ICCU.

NHTSA #11726476

The ICCU has failed for the 2nd time in a year requiring lengthy repairs. The car cannot be driven with a faulty ICCU. The ICCU is responsible for converting AC power to DC for and stepping it up to 800 volts to charge the primary battery. It is also responsible for keeping the secondary 12 volt battery charged.

NHTSA #11725450

My ioniq 5 EV experienced an integrated charge control unit (ICCU) failure. A couple days prior to complete failure, we were unable to charge the vehicle using either level 1 or level 2 chargers. Our local Hyundai service center advised us that it was likely an ICCU failure and was unsafe to drive, due to the possibility of sudden loss of drivetrain power. The vehicle was towed to our local service center (CardinaleWay Hyundai El Monte in El Monte, California) and the ICCU completely failed after arriving at the service center. The vehicle is still at the service center and we have been advised that there is a nationwide shortage on replacement parts, with backorders of weeks to months.

NHTSA #11725730

For the past few days, our 2022 Hyundai Ioniq 5 (approx. 83,000 miles) has been unable to charge using AC charging (Level 1 or Level 2). The failure is repeatable and consistent across multiple chargers: two separate home Level 2 chargers, the Hyundai-provided Level 1 charger, and a neighbor’s Level 2 charger. In each case, charging either fails to start or stops shortly after initiating. DC fast charging continues to work normally. Component/system suspected: The problem appears related to the vehicle’s onboard AC charging system (possible ICCU, onboard charger/OBC, charge port/inlet, or related high-voltage charging components). The vehicle and components are available for inspection upon request. Safety risk: This creates a safety concern because we cannot reliably charge the vehicle at home or at most public charging locations (which are predominantly Level 2 AC). This increases the risk of unexpectedly running out of charge and becoming stranded in unsafe locations, especially where DC fast chargers are not available. Reproduction/confirmation: The issue has been reproduced on multiple independent AC chargers, making it unlikely to be caused by a single EVSE/charger. A dealer appointment is scheduled for diagnosis and confirmation. Warning lamps/messages: When attempting AC charging, the vehicle reports a charging failure/unsuccessful charging condition (exact message UNKNOWN). No prior warning lamps were noticed before the issue began (UNKNOWN). This issue appears to be widespread based on numerous similar owner reports of AC charging failure on Ioniq 5 vehicles while DC fast charging still works, suggesting a potential systemic defect in the onboard charging/ICCU-related hardware.

NHTSA #11720286

ICCU Failure . Car stopped in the middle of the highway. I was able to move over thankfully to the side of the rode. Went into turtle mode and then it had to be Towed to my local Hyundai Dealership

NHTSA #11717782

My car is one of many Hyundai Ioniq 5 vehicles that has experienced an ICCU (Integrated Charging Control Unit) failure. This results in a car that is not drivable, and generally needs to be pulled over within a few miles, as it no longer can be driven above about 35 mph. It also will no longer charge on AC charging (level 1/2), since the ICCU is needing to convert AC -> DC to charge the main battery. This is a very well-known problem that Hyundai is addressing in only a piecemeal fashion. Here is a very long thread about this issue: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA #11718033

Unable to do AC charging due to faulty ICCU. A failing ICCU is dangerous to drive as the car may lose all of its power

NHTSA #11714256

ICCU failure 5 days ago. Needs to be replaced and the part is on backorder.

NHTSA #11713984

I first noticed something was wrong when the car only charged to 90% even though I set it to 100%, since I wanted it ready for the storm. I drove normally after that. When I tried to charge again, the breaker tripped. L1 charging also tripped the breaker. V2L didn’t work either. The weird part: the orange light was still on, and it was still charging the 12V battery multiple times. I have a battery monitor and everything looked normal. I was also able to drive the car to the dealer with no issues at all. No warning lights or errors on the dashboard. Dealer diagnosed it as an ICCU failure. Part is on backorder with no ETA

NHTSA #11714282

The ICCU failed to charge the car via level 1 (120VAC or 240VAC), but does charge using public DC chargers. Fortunately the issue occurred at home so no traffic issue occurred, in this case. The level 1 charger indicated a fault and would not charge the car. I drove the vehicle without any issues to a public charger and established that the DC charging is working. Hyundai repair center diagnosed the problem and confirmed that a repair is needed. I am currently awaiting a repair. The fault was diagnosed on January 22, 2026 and as of June 01, 2026 no repair has been done.

NHTSA #11741280

The ICCU failed. The car is at the dealership, availability of the failed part is unknown. The vehicle was no longer able to charge the battery. This could have happened while driving. The dealership has confirmed failure and will replace when a new part is available. Unknown if part has been inspected by others. Hyundai case has been opened. There was no warning. Indication of problem was breaker tripping at charging.

NHTSA #11720966

My vehicle experienced a failure of the Integrated Charging Control Unit (ICCU), which rendered the vehicle inoperable and required towing to the dealer, where the ICCU failure was confirmed and the vehicle remains available for inspection. The failure created a safety risk due to sudden loss of drivability and the potential for the vehicle to stop unexpectedly. The dealer has stated there is no estimated time of arrival for the replacement ICCU and no loaner vehicle has been provided. A similar ICCU failure occurred approximately one year ago (February 2025) and was repaired within one week, which is why it was not previously reported. Warning messages and drivability issues appeared prior to the failure.

NHTSA #11712956

The contact owns a 2022 Hyundai Ioniq 5. The contact stated that while driving at an undisclosed speed, the message “Check Electrical System Immediately” was displayed. The contact stated that the failure had occurred while the contact's minor children were inside the vehicle. The vehicle was driven to the residence. The vehicle was later towed to the dealer, where it was diagnosed with a failed ICCU and fuse. The contact was informed that the ICCU and fuse needed to be replaced. The vehicle was not repaired. The contact was informed that the parts for the repair were on back order. In addition, the contact stated that the vehicle was repaired under NHTSA Campaign Number: 24V868000 (Electrical System); in February 2025. The contact stated that only the software update was performed. In addition, the contact stated that the failure was a known failure with the vehicle. The manufacturer was made aware of the failure, and a case was filed. The contact was informed that the vehicle was no longer covered under warranty. The failure mileage was approximately 120,000.

NHTSA #11719975

Multiple 12v batteries died within one year of installation; ICCU finally failed at about 3.5 years of ownership. Towed to dealer on January 16, 2026, still no repair as of February 24, 2026.

NHTSA #11720223

My vehicle recently experienced issues charging. It would not charge using a Level 1 or 2 charger, but would allow limited Level 3 charging. After having the vehicle inspected by a Hyundai dealership, they confirmed that the ICCU had failed for the vehicle.

NHTSA #11714963

Vehicle experienced sudden loss of propulsion while driving despite indicated remaining battery charge (~13%). Vehicle became immobilized and required towing. Dealer performed static diagnostics after recharging and found no stored fault codes, but no testing was performed to evaluate sudden loss-of-propulsion under load. Manufacturer closed case without investigation. This presents an ongoing safety risk of unexpected propulsion loss in traffic.

NHTSA #11714187

The ICCU stopped working while I was charging with level 2 overnight. DC fast charging still works but car failed to charge with level 1 or 2. Warranty repair. Car is in dealer for approx 4+ weeks.

NHTSA #11713722

This vehicle is in for its second replacement of the ICCU unit. The first was on March 2023,

NHTSA #11708487

The ICCU unit failed, making this electric vehicle unchargeable and therefore undriveable. This is the second time this has happened on this vehicle and the wait for the part was 8 plus weeks. This is a nationwide issue.

NHTSA #11723635

Was charging the car at home in my garage when the charging session stopped. Opened the door and smelled electrical burning. Was able to put the car in neutral and push it out onto my driveway, fearing that an electrical fire could be disastrous. Called Hyundai roadside assistance and they had it towed to the closest dealership that can work on EV's (35 miles away). No report yet, but I'm pretty sure it's an ICCU failure.

NHTSA #11706768

While driving home, first "Check EV system" error came on and then "STOP VEHICLE - POWER SYSTEM FAILURE"; it was continuing to drive but would then not go above 25 mph. I pulled car over at next exit and had it towed to the dealership. It was not safe to drive at 25mph on a 45mph roadway. The dealership has confirmed problem with ICCU relay and 12V battery. This is the 2nd time this vehicle has had an ICCU problem.

NHTSA #11711119

I have had multiple issues believed to be related to the ICCU. The first issue was that my 12V battery deteriorated and died prematurely. I had to purchase a jump start charger and ultimately replace the OEM 12V battery in 2024 (within the first 2 years of owning my new vehicle) because it was failing to reliably start and I was at risk of being stranded every time I parked and turned off my vehicle. The 2nd issue occurred in Dec 2025 - the vehicle stopped charging with L1/L2 chargers. The dealer did not have availability to diagnose for 3+ weeks (until Jan'26), during which my only option was to use L3 Fast DC chargers (severely limiting my options for when/where I charge and costing a premium price). Once the dealer inspected my vehicle, they confirmed it was the ICCU and informed me there is a nationwide shortage and that it would be 6-8 weeks before a replacement was available. I'm currently at week 4 (mid-Feb) with no ETA currently available, so I'm forced to drive a replacement vehicle (and make alternative arrangements for personal travel that would violate replacement vehicle terms & conditions).

NHTSA #11718502

I have owned the car for less than 2 years and it has had 2 ICCU units put in it under warranty. I'm worried about the viability of the car after the warranty runs out. I would hope that given the problems with this component that Hyundai will help customers with this known problem.

NHTSA #11710213

The ICCU failed. This was verified both by my local Hyundai dealership, Conicelli, and Hyundai Corporate. My safety was put at risk because my car rapidly lost power, informing me to pull over now while I was in the middle of driving. This happened with no other warning. The component has been inspected by the manufacturer, and I had even received a recall already that was supposed to prevent this issue from happening. There were no prior warning signs other than the alert to pull over now, which accompanied a rapid loss of power.

NHTSA #11718327

ICCU Failure caused car to lose all motive power. Car held at dealer for 18 days until replacement part could be procured. ICCU reprogramming recall had been completed on the vehicle. Part failed anyway.

NHTSA #11714008

In summer 2025, the ICCU (Integrated Charging Control Unit) failed and was replaced under a Hyundai recall at no cost. On December 4, 2025, warning lights reappeared. College Park Hyundai diagnosed a faulty battery related to the prior ICCU failure. I paid out of pocket for a 12-volt battery replacement and additional maintenance, as the dealership claimed the battery was not covered. A “Check Electric Vehicle System” warning appeared immediately after I picked up the vehicle that same day. On December 5, 2025, I returned the vehicle to College Park Hyundai with 20,415 miles. They diagnosed a failed main EV drivetrain battery requiring warranty replacement. As of April 5, 2026, my vehicle has been at the dealership for 122 consecutive days with no repair completed, no replacement battery received, and no estimated completion date. Despite repeated follow-ups, I have received no meaningful updates on repair status or battery availability. I have been without my vehicle for four months with no resolution in sight. This extended delay represents a significant safety concern and an unacceptable failure of Hyundai’s warranty obligations.

NHTSA #11729307

The car would no longer charge and the dealer said it is due to a faulty ICCU. The dealer said this part is on back order with an indefinite freeze and no ETA. My car has been at the dealership shop since January 29 and Hyundai corporate has not been helpful when I escalated to them. Overall I have had these charging issues since early December. Hyundai has denied my request to buyback the vehicle since it is over 4 years old now (2022). I’m very disappointed and concerned about the ongoing ability for this vehicle to be safe and drivable.

NHTSA #11721138

The car stopped both Level 1 and 2 charging. But Level 3 charging worked. When it stopped in the middle of Level 2 charging, it tripped my circuit and bricked my Juicebix Level 2 charger. Hyundai replaced the ICCU.

NHTSA #11705629

While charging at home with provided Level 1 Charger, the vehicle will suddenly stop charging. When it stops, it appears to be surging an electrical charge back into the home (black marks on outlets requiring an electrician to replace, black marks on the charger plug, and most recently, threw a breaker on our home electrical panel). This is a fire hazard.

NHTSA #11698026

Iccu failure for the 3rd time

NHTSA #11696642

My ioniq 5 has had the ICCU and 12V battery replaced in April, due to ICCU failure. Since then on two separate occasions the car has drained the 12V battery while parked. Both times were shortly after driving the car, so the 12V battery should have been fully charged. I believe multiple recall campaigns have been made related to this issue, but my car still appears to exhibit the symptoms after receiving the updates. * I believe the ICCU software is faulty and is not correctly charging the 12V battery. * This fault makes the car likely to strand my family unexpectedly (a safety issue), as it affects even the newly replaced 12V battery. * I have not taken this vehicle back to the dealership since the ICCU was replaced, since the 12V battery has only drained twice since then, I feel like it is unlikely they will be able to reproduce the issue. * No warning lamps or fault codes stored in the ECU.

NHTSA #11695677

Car died due to 12v battery failure due to ICCU not working properly in Oct 2023. Did ICCU recall and safety updates with dealer and they installed a new 12v battery. Oct 2025, car dies again due to 12v battery failure to to ICCU. Car has been at dealer for over 2 months waiting for new ICCU part to arrive and be installed. The ICCU system on this vehicle and related vehicles in the Hyundai/Kia line up seem to have a significant design flaw. I have no confidence a new ICCU part will 'fix' the issue. This will just push the issue out again until the new 12v battery dies and we do it all over again.

NHTSA #11714194

The car would not charge. The Dealership where the car was bought assessed the problem and found out that the Integrated Charging Control Unit (ICCU) of the car had failed. They already replaced the component, however I am reporting this problem so as to be included in the statistics for this common problem with this Hyundai make.

NHTSA #11698290

On October 16th our ICCU blew. I know Hyundai says this only affects 1% of vehicles, but the 2 people we also know with the same car have had the same failure, so this seems impossible so I wanted to report it. - The ICCU broke and fuse blew while charging. It blew while charging at 24 amps and actually blew the adjacent breaker as well in our panel. - The ICCU and main fuse were confirmed to be blown by the dealer in October. - There were no symptoms or warning lights most of the time; it just blew our panel breaker and would no longer AC charge. While trying to charge it, it did briefly show an electrical vehicle system error code, but when we turned it off and back on it went away. - My understanding is that with a blown fuse and ICCU it does not charge the 12v battery, so while we could drive the car and not even realize there was a problem, the battery could die while driving and create a very unsafe situation.

NHTSA #11708864

Iccu failure cause vehicle to lose power in the middle of the interstate, Hyundai has no solution for the ongoing problem

NHTSA #11725015

The battery is charged but will not start. It says pull over safely before it goes completely dead.i can jump the battery but it does not continue after being turned off. Slow and hard turning.

NHTSA #11735203

The Hyundai Ioniq 5 would not charge, so I could not drive it. Got it to Hyundai for a diagnosis and as of now they are saying it is part number # 36400-1xAA0 ICCU ASSY and part number # 375F2-GI040 FUSE-HIGH VOLTAGE.

NHTSA #11675463

Car started issuing a burning smell, emitting a noxious burning smell through the air vents making it impossible to drive with the windows closed. The HVAC system had to be shut off. The Ioniq 5 and all E-GMP Hyundai vehicles have known issues with the charging port and ICCU (integrated charging control unit). This vehicle has had all previous recalls related to charging and the ICCU addressed, but it has still resulted in failure of the vehicle charging port. Dealership stated charging port needed to be replaced, but stated it would not be covered under warranty with now explanation provided despite the fact that this is still covered under several recalls.

NHTSA #11676242

ICCU failed while driving. Risk was that I suddenly had to pull over safely, as my car would no longer accelerate. This is a known issue, yet they haven’t fully addressed it over years. I had it taken in for recall fixes, and the part still failed 2 weeks later. There was no warning before it happened. But failure signs appeared after.

NHTSA #11669882

The ICCU on my 2022 IONIQ 5 SE AWD failed during (or immediately after) using a public Level 2 ChargePoint charger.

NHTSA #11663587

My vehicle was affected by Recall 272 and in December 2024 only the software for the ICCU was updated. Now the ICCU is bad and Hyundai wants to give the run around and say that my vehicle wasn't affected by the recall. It clearly was and they need to make it right. My car is currently sitting at the dealership that I bought it from and I feel like they are not trying to do anything to help. I have called each day to get an update and all I get it, "we are still waiting". I am beyond frustrated at this point.

NHTSA #11661399

My EV’s ICCU failed. It has since been fixed and is not available for inspection. Yes, my safety was at risk because my speed was suddenly limited away from home and I had to get my family home. After a wait of about 3.5 weeks, the dealer confirmed it was an ICCU failure and replaced the ICCU about one week after that. There were no warnings until the failure occurred. I believe Hyundai’s ICCU problems are well-known, but want NHTSA to be aware.

NHTSA #11670023

Recall 272 was addressed on Dec 31, 2024. ICCU and fuse replaced; software updated. On 4/26/2025, 'Low voltage on the 12 volt battery, stop safely’ warned came on when I tried to start the car. The car was used several times earlier in the day and is used daily (i.e., does not sit idle). No other warnings were noticed prior to this failure.

NHTSA #11656913

Driving on the highway/freeway, received an error message on dashboard "stop vehicle and check power supply". The car slowed down, max speed around 45 but thankfully my hazard lights still worked and I exited the next exit. I've heard I was lucky as some people with the same problem - the car goes into "limp" mode and slows down to 5mph or stops completely. Very unsafe on a highway for everyone. Dealer has checked the vehicle and states it's an ICCU problem

NHTSA #11657668

ICCU failure. Fortunately only 1-1/2 miles from home. Car towed to dealer.

NHTSA #11655038

Instrument cluster screen continuously resets itself while driving. Speedometer and safety warnings not available.

NHTSA #11650839

Plugged the car into an L2 AC charger like I have for nearly 2 years, the car tripped a breaker in my electrical panel and after restoring power to the charger, the car would no longer initiate a charge on L2 power. Confirmed this by attempting to charge at a public L2 charger, same result. Took the car to Hyundai and they confirmed the ICCU needs to be replaced and it's a wait of up to 8 weeks.

NHTSA #11651824

My 2022 Ioniq 5 had an ICCU failure in March 2025. It has been with the dealership for 10 days. It does not charge on 220 v AC L2 charger. It does charge on public DC fast chargers but at approximately 120 KWH not 350 KWH. There are no error codes on the dash, however the ChargePoint charger trips with a GFCI fault. GFCI fault in a high voltage system could pose a serious safety issue. ChargePoint (the L2 charger manufacturer) support checked, and said they see a GFCI fault when my car is plugged in. To make sure it is not a charger error, I had another car, a Kia EV6 plugged in to the same ChargePoint charger, and it charged normally.

NHTSA #11652412

ICCU and HV Fuse blew

NHTSA #11649225

ICCU failed during driving causing car to come to a halt on a busy road quickly, thankfully enough time to drive to side of road. Car had been in dealer for ICCU software update/recall 2 weeks before hand. Whatever the current fix is for the ICCU is clearly incomplete, at the Seattle Hyundai dealership there are 6 cars all waiting 6+ weeks on replacement parts for this issue. This seems like a significantly bigger problem than Hyundai is admitting and they are not proactively addressing with urgency. Thankfully we were only on a busy arterial not on a highway.

NHTSA #11649267

The contact owns a 2022 Hyundai Ioniq 5. The contact stated while driving approximately 25 MPH, the vehicle lost power with the message 12-Volt battery low. The vehicle was towed to the dealer and was repaired under NHTSA Campaign Number: 24V868000 (Electrical System) and 24V204000 (Electrical System). The contact stated that approximately three weeks later while the vehicle was parked, the message 12-Volt battery low was displayed on the instrument panel. The dealer was contacted, and an appointment was scheduled three weeks in advance. After driving the vehicle to the residence and the vehicle was parked, the vehicle failed to start. The battery was recharged for 15 minutes, and the vehicle was able to start. The vehicle was towed to the dealer; however, the vehicle was not repaired. The manufacturer was informed of the failure and opened a case. The failure mileage was 4,000.

NHTSA #11656232

15 miles south of Crescent City California, "Check EV system" warning displayed, and power immediately tapered to a crawl in 30 seconds or so. No earlier warnings appeared. Car was towed to Northwoods Hyundai in Eureka where the problem was identified as ICCU failure. No parts appear to be available, and car has been sitting in the elements now for over 6 weeks, 300 miles from home. No repair date has been indicated, and the new ICCU is still back ordered.

NHTSA #11657957

Turned on vehicle, immediately received "Check Electric Vehicle System" message. Drove ~1 mile back from coffee shop to work parking. Halfway to work parking, message updated to safely pull over and stop vehicle while at stoplight. Turned vehicle off during red light and turned vehicle back on during green light. "Check Electric Vehicle System" immediately displayed. Park at work parking. ~1 hour later, move car from work parking to guest parking to be towed to dealership, "Check Electric Vehicle System" still displayed. Dealership later confirms ICCU fault.

NHTSA #11650656

ICCU failure resulting in inability to charge or drive. Thankfully, occurred while pulling into driveway as there were no previous warnings and app still indicated that “all systems normal”.

NHTSA #11656206

I was driving home on a very cold morning and heard a "thunk" in the back right of my car. Almost immediately I got a warning that my cars electrical vehicle system needed attention. That quickly turned to a turtle telling me the issue with the electric vehicle system was limiting speed. Eventually my car stopped working. I had the 12v battery jumped and got it home. After charging the 12v battery for over a day and calling a local dealership, they determined it was most likely the ICCU. I drove my car around to the front of my house and immediately got the same warning. It was towed that same day. It has now been 2 weeks and the part is on back-order.

NHTSA #11647467

My car is an EV. I was charging the vehicle and it quit. I had just enough charge to limp to the dealership where it was diagnosed with ICCU failure. According to you records my car is not under a recall but the part failed. Glad I wasn't on the road. So my car has sat at the dealership since February 24th. Hyundai doesn't seem concerned about getting the parts to the dealership. This is why they can't give me an ETA: "Please note that part orders can take several days or even weeks to arrive depending on the availability and supply chain logistics, as outlined in Hyundai's policies." So they are still turning out Ioniqs but can't be bothered to make sure cars with an ICCU failure are safe and can drive. I can't sell my car and I am stuck. I also believe the 1% you say are effected by this problem is much higher.

NHTSA #11652455

Car will start but has no propulsion. Error says “Check EV System”

NHTSA #11642787

My 2022 Ioniq 5 had an ICCU failure on February 2025. On February 12, 2025 I was not able to charge the car. I took it to the dealer twice for an ICCU software update. The first software update was on October 15, 2024. The second software update was January 16 2025. The third time was on February 13, 2025 for an ICCU failure. The car is at the dealership and waiting for the part so it can be replaced. If you need to do an inspection the car is at the dealership. There was no warning, it just will not take a charge. I have been waiting for a little over a month for the part to arrive at the dealership for replacement. I've call the dealership multiple times inquiring about the new replacement. They have no idea when this part will become available. I'm frustrated because no one knows anything so my car sits on their lot waiting for a part that I feel they should have in stock. Hyundai has known about the ICCU failures since 2022. Why Hyundai dealerships do not have ICCU's readily available? Knowing very well about these recalls and failures.

NHTSA #11648076

The contact owns a 2022 Hyundai Ioniq 5. The contact stated while driving 45 MPH, the vehicle started to lose motive power, after which the message "Critical Battery Level - Stop Car" was displayed, prompting the contact to pull over to the shoulder of the roadway. The battery warning light was illuminated. The vehicle was towed to the dealer, who diagnosed a failure with the Integrated Charging Control Unit (ICCU) relay. The vehicle was not repaired due to the part being on backorder. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 59,000.

NHTSA #11642271

Less than 48 hours after getting the latest Integrated Charging Control Unit (ICCU) recall performed (Hyundai Recall Number 272, NHTSA Recall Number 24V-868), the ICCU on my car failed. This resulted in the 12V battery no longer being charged by the EV's main battery, and the car entering "Limp-Home Mode", limiting the car's speed to 20mph. Error messages include "Check electric vehicle system" and "Stop vehicle and check power supply". These messages appeared when the ICCU failed, not before. ICCU failures are well known with this car, hence the recall. However, there is anecdotal evidence in the Ioniq 5 Facebook forums that indicate that the ICCU failure rate INCREASES on cars that have had the recall performed. Hyundai and the NHTSA need to examine the failure data to see if there is a cause-and-effect relationship between recall repair and increased failure rate, or if the failures observed by the community are just coincidental.

NHTSA #11640104

I took my Hyundai in twice to a local dealership for the recall to be fixed. They failed both times to remedy the situation, and said they would handle it again at my next scheduled service appointment. A few weeks later my car suffered from the ICCU failure and I was stuck without a working vehicle. I had my car towed to the dealership 20 days ago but they have no ETA on the part needed to fix the recall.

NHTSA #11639476

ICCU failure occurred while vehicle was operating at 30 MPH, after being charged the night prior and unplugged in the morning at 100% capacity. A sudden pop was heard, and the vehicle indicated that an electrical fault would require the vehicle to be shut down as soon as safely possible. The vehicle went into limp mode and would not exceed 25 MPH.

NHTSA #11726962

The car lost power while driving and an electrical warning was displayed on the screen. The issue was later diagnosed as a failure of the ICCU and blown fuse that had been previously recalled and replaced. Now it needs to be replaced again.

NHTSA #11732961

Check Vehicle Electric System warming shows up on dashboard, then vehicles enters turtle mode and then cuts power shortly with violent jerking of the vehicle. Shortly after, all system shuts down, 12V is said to be weak and car cannot move.

NHTSA #11702159

The ICCU (Integrated Charge Control Unit) failed. The car was in a Hyundai dealer repair shop on November 18, 2025, for an unrelated regular maintenance procedure when (i) the technician noticed a logged ICCU error code generated sometime prior to the shop visit and (ii) after the technician cleared that prior error a second new ICCU error code was generated. The shop replaced the defective ICCU. This car had been serviced on prior occasions to install updated ICCU software, most recently as part of NHTSA's recall 24V868000 of November 18, 2024 (also known as Hyundai Safety Recall 272), intended to eliminate such ICCU failures. Installation of that software as the remedy for recall 24V868000 clearly did not prevent the very ICCU failure it was intended to guard against. Please note also that it is common knowledge (as disseminated on various Ioniq 5 forums and Reddit groups) that large numbers of later Ioniq 5 vehicles with newer VINs not included in recall 24V868000, i.e., from model year 2025 onward, have also suffered from these failures despite being initially placed into service with the updated ICCU software, as well as many other pre-2025 remedied vehicles. The Hyundai ICCU software currently in operation on both remedied cars from recall 24V868000 as well as newer cars not subject to that recall is clearly entirely ineffective as a solution to this very serious safety issue. I strongly urge NHTSA to (i) declare the existing ICCU software to be an ineffective remedy for recall 24V868000, (ii) include all Hyundai Ioniq 5 cars for all model years, whether running current ICCU software or not, to be part of the group of unremedied and unsafe vehicles, and (iii) extend recall 24V868000 until such time as Hyundai can actually demonstrate that an effective remedy exists and is being made available to all Ioniq 5 vehicles.

NHTSA #11700905

Carr went into limp mode and wouldn’t drive more than approximately 10 mph in traffic. Once I was able to pull over and reset the ignition button, the car seems to be operating normally.

NHTSA #11699269

The Integrated Charging Control Unit (ICCU) in my 2022 Hyundai Ioniq has not been diagnosed or repaired despite being at the dealership for 3 months for a safety recall. The ICCU controls the vehicle’s electrical and charging systems, and a malfunction could prevent the vehicle from charging or operating properly, creating a risk of loss of propulsion while driving. Two different Hyundai dealers have had the vehicle since July 11, 2025, but no diagnosis or repair has been completed. I have escalated the issue to Hyundai Corporate, but there has been no resolution or communication of a timeline. The vehicle is available for inspection upon request. No warning lamps or messages were reported prior to the dealer receiving the vehicle, as the car was delivered specifically for the recall repair. Due to this unresolved recall, I have been without my vehicle for 3 months, which has caused significant hardship and forced me to rent a vehicle temporarily. I was given a loaner vehicle eventually but this vehicle is not comparable to my ioniq5. Both dealer's gave excuses for the lack of diagnosing and repairs, ranging from "technician is on jurty duty" or "the climate is too hot outside to look at it."

NHTSA #11689195

While driving, a warning message displayed on the dashboard stating that there was a fault in the electrical system and that I should pull over and stop the car. As I tried to find a safe place to pull over the car lost power and I pulled onto the shoulder. The shoulder was only as wide as the car. I was stopped on the side of a two lane road with a 55 mph speed limit. In order to exit the car I had to step into the travel lane. The electrical fault resulted in no power available to the warning flasher lights or headlights. This occurred at night with no street lighting to show oncoming drivers that there was a stopped vehicle immediately next to the traffic lane. This put me and other drivers at risk. The vehicle was towed to a dealer capable of working on this type of failure. The dealer determined that the failed component is known as the ICCU. This is a critical part and had been known to fail in this model. My vehicle had already received every software update in an attempt by the manufacturer to avoid the ICCU failure. The dealer replaced the failed ICCU with a new working ICCU. It is my understanding that the replacement ICCU is identical to the failed ICCU and a risk remains that the new one could fail as well with a loss of power while driving at speed.

NHTSA #11714315

Turning into my driveway one evening, the car displayed the "Check Electric Vehicle System" alert on dash. The following morning while backing out of the driveway to wait for a tow, the alert changed to "Stop vehicle and check power supply". Got car towed to dealer, and after diagnosing, confirmed that ICCU failed. Car has been at the dealer for almost 2 weeks at this point, and the part is still back-ordered with no ETA, according to the service advisor I have been working with.

NHTSA #11639920

I had the most recent recall (code 702 I believe) done on January 13th. I believe the recall was an NHTSA required recall and after the software update that was part of the recall my car will no longer charge. It has been with the dealer since January 15th with no resolution in sight. The software update was I believe the 4th such update intended to prevent a part called an ICCU from failing. It took 4 business days but the dealer Hyundai of Roseville confirmed the ICCU needs to be replaced and they don’t have an ETA on when the part will be shipped. Online I have seen reports of the same thing happening to others and the ICCU repair process taking 1-2 months.

NHTSA #11638976

My 2022 Hyundai Ioniq 5 has experienced two ICCU (Integrated Charging Control Unit) failures, both completely immobilizing the vehicle. •First failure: November 2024 •Second failure: December 31, 2025 (confirmed by dealer 1/13/26) •Downtime: Over 45 days total •All recall work and maintenance were performed at the same Hyundai dealer, under active warranty, but the recall did not prevent the second failure. Safety Risk: These ICCU failures cause sudden loss of propulsion, leaving the vehicle stranded and creating a serious safety hazard. The second failure after recall indicates the repair is inadequate. Luckily mine failed at home before departing for an errand, but I am gravely concerned about others not as fortunate or for myself should the issue recur while I am traveling on a public road. Examples of this are reported online in a variety of forums. Widespread Issue: Thousands of owners report similar ICCU failures, often after recall repairs, on forums and social media. There is also ongoing Canadian litigation addressing the same defect. Requested Action: •Investigate repeated ICCU failures in Hyundai/Kia EVs •Evaluate the adequacy of recall repairs •Require Hyundai to implement a permanent fix •Take appropriate safety action to protect vehicle owners

NHTSA #11710901

The Integrated Charging Control Unit (ICCU) has intermittent failures. During the last failure, my wife was on a busy freeway (Interstate 5 near Hwy 120 northbound) in heavy but fast moving traffic. She was driving in the #2 lane (of 4 lanes) when she experienced sudden loss of propulsion. The vehicle slowed to 5 MPH in traffic that was moving 70 to 80 MPH. She had to traverse through the #3 and #4 lanes to the narrow emergency shoulder. Cars were honking and flipping her off. In the emergency lane, the vehicle completely died after 30 to 60 seconds. She was at risk of being rear ended during the dangerous 5 MPH lane changes and in the time parked in the emergency lane. She could not start the car for 15 minutes, after which the system came back to life. She was then able to start it and continue home. The first time the ICCU failed was in a parking lot. This is a known defect with Hyundai which they have attempted to rectify with Recall Campaign 272. However, they refuse to replace the ICCU. After the first event, they replaced the battery after 22 months/32429 miles. Now they want to replace the battery again after another 20 months/34k miles. What they don't get, is that the batteries have not prematurely failed. Instead the ICCU has intermittently and temporarily drawn the batteries down causing the vehicle to lose propulsion and die. They refuse to replace the ICCU because an error code they were looking for was not in the memory. They have performed three software updates on three separate dealer visits, but the issue has not been resolved. During the last visit they kept my vehicle for six weeks while I appealed through Hyundai Consumer Affairs and the Service manager appealed through his Dealer rep. But the factory engineers held firm and would not approve the ICCU warranty replacement, and instead wanted me to pay for 12V battery replacement. We don't know if there were any warning lights since my wife was busy navigating the danger.

NHTSA #11716391

Electric Drive System Inoperable, sustained an immediate failure upon engaging in Drive mode. Dashboard lit up with warning lights and messages. Luckily was just pulling out onto road when vehicle completely died. Tow service unable to start vehicle with jumper module. After being towed to dealer, was diagnosed with failed ICCU. The original ICCU was replaced previously in January 2025. Luckily was not underway on the road when it happened. There was no warning, no indication that there was any problem.

NHTSA #11701871

Even after the recall service performed, the ICCU still failed 10 months later. DTC P1E011C is listed and will not charge. This is the same issue for the KIA EV9 and a TSB needs to be issued the same as the TSB 339 KIA did for the EV9.

NHTSA #11698705

Despite being up-to-date on recalls for this vehicle intended to address failures with the integrated charging control unit (ICCU), I still experienced an ICCU failure. I was driving along a surface road at approximately 40 mph for about 9 minutes when I heard a pop that sounded like cargo shifting in the rear cargo area. The vehicle then flashed a "Check EV System" warning but otherwise continued to operate normally. About 2 minutes later, there was a warning to stop vehicle and check power supply. After I pulled into a parking lot, I restarted the vehicle, but the errors persisted. I had the vehicle towed to the dealer, where it was diagnosed as an ICCU failure. The vehicle was last charged ~15 hours before the failure on a level 2 charger at a peak rate of 6 kw. The vehicle was driven for about an hour after charging, sat overnight, before being driven when the failure occurred. The vehicle is primarily charged using level 1 and 2 charging, typically not exceeding 6.3 kw. Only a handful of times has level 2 charging rates exceeded 6.3 kw. The vehicle previously had the ICCU fail and replaced in 2023. The car is still at the dealership with no repair timeline.

NHTSA #11695346

ICCU failure. Vehicle abruptly reduced speed while on the road. Hyundai has inspected the vehicle and confirmed the failure. "Stop vehicle and check power supply" warning. "Check electric vehicle system" warning. "12v batter voltage low. Stop safely" warning. All first appeared within a few minutes of the vehicle losing power. Vehicle has been at dealership for repair/replacement of ICCU since February 7th.

NHTSA #11645846

This is the second time I’ve taken my Hyundai IONIQ 5 in to Hyundai as part of a recall “fix” for ICCU Failure. Each time, the car has been operating fine, I take the car in for the “fix” as it’s required, and then shortly after the car breaks down while it’s in motion / operating. I’ve concluded these are not “fixes” and I have no ability to trust the safety or reliability of the vehicle. 1) ICCU Failure 8 Days After Recall “Fix”. Same thing happened the previous year. Took the car in for the recall “Fix” and shortly after the car dangerous broke down while driving. 2) Car became a brick. 3) Yes, Hyundai Service Center has confirmed ICCU fault. 4) Yes, see #3 5) Yes, minutes before the car became inoperable.

NHTSA #11643344

My car suffered a failure of the Integrated Charge Control Unit ("ICCU") which makes the car underivable. This is the third time that I have had an issue with the ICCU. The first two times, it failed to charge the 12V battery, leading to a loss of all 12V systems and being unable to drive the car. This third time, the car now refuses to charge on AC power. Hyundai has tried to "repair" this issue with software updates, but it doesn't fix it. Now I am waiting for a remanufactured ICCU to replace my broken one.

NHTSA #11643374

Iccu failure unable to charge or drive

NHTSA #11711921

The Integrated Charging Control Unit (ICCU) failed - the car is no longer capable of driving due to the lack of ability to charge the battery. I was able to get it to the repair center. The ICCU on this model can fail in multiple ways, which includes the vehicle becoming inoperable at highway speeds. The issue first started 2025/11/13. I tried multiple charging units. It flipped the breaker on my home charger and caused issues for a public charger.

NHTSA #11699879

ICCU and High Voltage Fuse blew suddenly and without warning on a 50 mph poorly lit road before sunrise. Vehicle immediately entered limp mode in traffic. Car could not make it safely back home before losing all power in the middle of the road (no warning was given that limp mode was about to fail it just stopped with all screens still on).The dead 12v battery (which the ICCU failed to recharge) made the car completely immobile once it turned off even for towing purposes. Put my safety as a driver and those on the road with me at risk with the vehicle drastically slowing down in the middle of travel with no way for others to pass me. Problem confirmed as the ICCU failure by dealer after finally restoring enough power to get the vehicle in neutral to be towed. The pending recall on this Vin is only pending because it is still sitting waiting for the replacement part a month later. no ETA on a resolution as Hyundai has stopped responding to requests for any information on timelines other than "eventually it will be replaced". All previous recalls for this problem were completed but were only software updates to "potential lower chances of occurrence". Issue is a very known Hardware issue and is very well documented online and local dealers are extremely familiar with it, but Hyundais solution is only to check if the part has already failed and a software update that does not fully prevent the failure in the future. Issue still occurred. no prior warning or behaviors were given

NHTSA #11654631

Was pulling out of drive way. Loud pop heard in the car. Immediately car flashed warning telling me electrical system had an issue and I needed to pull over and have the car towed to a dealer for service. Was told the part was related to the iccu and would take a couple days to arrive. Part is now on back order. 3 weeks later I am still waiting with little to no update on timeline for repair.

NHTSA #11646615

On [XXX] I was preparing to leave for work in the morning. I unplugged my Ioniq 5 from the home charger, entered the car, and started the vehicle. Immediately, the panel warning system stated “Check Electrical System.” Because I am familiar with the warnings that have been displayed related to ICCU failure, I called the dealership to schedule a service appointment (set for February 18, the following Tuesday). I drove the car to work for a meeting, then restarted the vehicle following the meeting and the same message appeared on the screen. I then drove the vehicle directly to Werner Hyundai Service Department in Tallahassee, Florida and left it for diagnostics. On February 14, 2025, my service advisor called to advise that the ICCU and the VCMS had failed and required replacement. I was then advised that I would be placed on a waiting list for an ICCU part that was expected to be released nationwide on March 1, 2025. As of today’s date, March 8th, I have not been made aware of an ICCU part availability (apparently the VCMS has arrived at the dealership and is being held pending the receipt of an ICCU) nor an anticipated repair of my vehicle, it remains at the dealership service department pending parts availability. My husband unplugged our home charger that uses a 220 volt plug and noted that the plug showed melting damage and that the plug and wall had black marks that suggest that the car caused a malfunction that resulted in a spark in our garage. Due to the location of the outlet, the spark did not cause a fire. Since that date, every time our HVAC system comes on at home, our lights flash, this did not happen prior to [XXX]. We are contacting an electrician to inspect the outlet and any affect the surge had on our home electrical panel. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA #11647180

On January 31, 2025, my 2022 Hyundai Ioniq 5 experienced a failure with its ICCU resulting in the vehicle to lose all power and become unable to be turned on exposing myself and others to conditions where the vehicle could become a serious safety hazard due to its complete lack of power. This occurred despite the application of the NHTSA Hyundai Recall 272 only two weeks prior to this incident which was supposed to prevent this serious safety defect from occurring. The vehicle's 12 V battery was subsequently replaced allowing the vehicle to display a "Check electric vehicle system" warning. The dealership has since confirmed this as the ICCU defect. No warnings or other messages preceded this incident.

NHTSA #11660128

The ICCU on this vehicle has been replaced twice, 10/25 and 1/26. The failure of the unit on stopped any movement of the car,leaving me stranded on busy highways. I have had all software updates performed prior to these failures

NHTSA #11711725

Iccu blew. Car cannot be charged

NHTSA #11713993

The ICCU failed while 300 miles from home. I was unable to charge the car with level 2 charging to get home. Luckily level 3 charging still worked. The ICCU breaking can also disrupt propulsion, so I'm lucky it didn't break to that degree while driving. The dealership ultimately replaced my ICCU. There were no warning signs. In fact, the car didn't even throw a code or error. It simply wouldn't charge.

NHTSA #11725470

Battery conditioning (heating) is required for fast charging at cold temperatures. The current method of enabling this function takes many steps including going into the EV setting to enable this option (since it automatically turns off when changing some settings in the Hyundai Bluelink App), then opening the navigation screen, looking at a map and scrolling though a long list of charging sites, picking the desired charger then starting the navigation and route to that site. This has to be to done while in route to a specific charger, normally this would be on the freeway 20-40 minutes before arrival at a fast charging station. It is a distraction while driving and is an issue with all Ioniq 5's sold from 2022-2024. Hyundai fixed this problem for the 2025 model year but have not do so on the previous cars at this time. Hyundai needs to add this 1 touch preconditioning option for safety and driver ease of use. I feel it should required on all EVs that offer battery conditioning. I have told them about this several times and not gotten a response and according to posts in various online communities many other have also reported this issue to Hyundai but they have taken no action.

NHTSA #11693189

On January 19, 2026, the vehicle lost power while driving and required a tow to the local dealership. After inspection, the dealership determined that the ICCU was at fault and needed to be replaced. The ICCU part was backordered. The vehicle was inoperable for 6 weeks as we waited for the part to be available and installed.

NHTSA #11727197

I am filing this complaint regarding Hyundai Motor America's failure to complete a vehicle repair in a timely manner on my 2022 Hyundai Ioniq 5 (VIN: [XXX] ), which has been at Hyundai of Leander, an authorized Hyundai service center in Leander, Texas, since September 2025 — more than six months — awaiting a replacement high-voltage battery. (Case No. XXX) I purchased this vehicle in September 2025 from Apple Sport Imports in [XXX] . The vehicle was sent immediately to Hyundai of Leander for an open repair and I never took full delivery. I was informed the replacement battery was initially allocated to a different dealership and a new order could not be placed until approximately January 2026. As of March 2026, Hyundai's own case manager confirmed in writing on March 30, 2026 only that they are working to determine the battery's arrival date with no confirmed completion date provided. Since November 2025, I have made 5 monthly payments of $513.92 totaling $2,569.60 on a vehicle I have never driven, with a sixth payment of $513.92 due in April 2026. I am also flagging a potential records discrepancy for NHTSA's awareness. When I checked my VIN on Hyundai's recall lookup website, Recall 272 — covering an ICCU software update, fuse replacement, and ICCU replacement on 2022-2024 MY IONIQ 5 vehicles — is listed as a Closed Campaign with a completion date of October 24, 2025. My vehicle was physically at Hyundai of Leander awaiting parts on that date and remains there today. I do not know whether this recall is related to the current open repair, but I am flagging the potential discrepancy for investigation. When I raised this with Hyundai of Leander's service department, I received no clear explanation. I am requesting that NHTSA investigate Hyundai Motor America's recall fulfillment practices and the accuracy of their recall completion records for this vehicle. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA #11727928

The ICCU in the car failed. It immediately limited the speed of the vehicle to 25mph. There were no warnings, it happened all at once. I had to drive on the shoulder of the interstate to the next exit. Obviously, driving 25 on the shoulder while cars passed me at 65+ was not a safe situation.

NHTSA #11671601