2025 Hyundai Ioniq 5 Complaint Log

On [XXX] while driving the car on a city street in Northhampton, MA, I heard a loud "pop" and there were multiple warning lights, beeps and messages indicating there was a problem with the electrical system. The car slowed dramatically and I was unable to drive at a safe speed to keep up with traffic. The car slowly lost power and I was able to pull over to the side of the road. The temperature was 15 degrees F - very cold, no heat and I had to stay with the car in freezing cold temperatures to await transport via tow to the local dealer. The tow service required that someone be with the vehicle in order to receive a tow. The dealer diagnosed the car with a failed ICCU - a well-known, increasingly common issue with these cars - and said there were already 10 Ioniqs on the lot awaiting replacement ICCUs. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2025 Hyundai Ioniq 5. The contact stated that after starting the vehicle, the battery warning light remained illuminated, and the vehicle failed to exceed 45 MPH while driving. The messages "Onboard Charger - Stop Vehicle" and "Power Supply" were displayed. The vehicle was later towed to the local dealer who diagnosed that the ICCU Module had failed and needed to be replaced. The vehicle was not yet repaired. The contact stated that during the failure, the electric battery had failed to recharge the 12-Volt battery as intended, which caused the failure. The manufacturer was notified of the failure and informed the contact that the vehicle was not included in NHTSA Campaign Number: 24V868000 (ELECTRICAL SYSTEM). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 8,000.

All of a sudden after starting the car I got a “Check Electric Vehicle” warning sign and when I called the dealership the told me do NOT drive it and tow it. The basically told me it will die on me.

Check electric vehicle system light came on and power slowly diminished which meant the car was unable to sustain highway speeds. Had to be towed to dealership.

For the HYUNDAI Ioniq 5 XRT, the ICCU, fuse and perhaps hybrid battery malfunctioned. We were in a disabled car on a 4 lane highway with traffic: On February 10, 2026, as we drove out of our home we heard a loud pop. As we got out onto a large 4 lane road near our house, the notice “Check Electrical System” came on and the car’s power was drastically reduced. We made a U turn and drove (20 mph) back to our driveway. We were fortunate that this was mid-day and the road was relatively clear. Normally this is an extremely busy road with traffic moving at 40-50 mph and we would have had great difficulty even pulling out to the side -- as there is only marginal side space on this road. Hyundai has confirmed to us that the ICCU and a related fuse failed. They also think the hybrid battery is also involved and they are testing to confirm that. We had no warning at all -- except for the electrical warning that came on as the car's power was reduced. The car had charged normally and had had no warning signals/signs at all.

While charging the vehicle, I heard a loud pop and the charging session stopped and could not be restarted. An error warning icon appeared on the dash with a battery icon. Also a car with an! Icon and a large circle stating check the electrical system. I was able to drive a few miles before the car completely died.

The vehicle's ICCU failed after 7 months and 7k miles of driving. This is a known issue that Hyundai has not addressed or issued a recall for.

Vehicle's charging system failed when vehicle was remote started. Specifically the ICCU failed, and drained the low voltage system of power. Vehicle would not move, and left me stranded. Currently, Vehicle is at a dealership awaiting inspection for warranty repair. Multiple warning lights, DTC P1A9096.

In-Cabin Camera Unit Replacement - The in- cabin camera unit needs replacement due to a communication failure with the ICC module. Technicians confirmed proper power, ground, and CAN system continuity to the module but encountered a persistent 'ROM ID check failed' error. Replacing the unit can restore proper communication and functionality of the camera system.

The vehicle experienced a sudden failure of the Integrated Charging Control Unit (ICCU). While driving, a loud "pop" was heard, followed immediately by a "Check Electric Vehicle System" warning on the dashboard. The vehicle then entered "Limp Mode" with significantly reduced propulsion. The 12V battery became depleted, leading to a complete loss of motive power and loss of electronic safety systems, creating a hazardous situation in traffic.

ICCU failure causing the car to go into low power mode. Tow required to get the car to the dealership for repair.

What failed: On February, 6, 2026, I experienced a complete failure of my Ioniq 5's electrical system due to the ICCU failing. Heard a loud "pop" and eight seconds later it reported a warning to check the vehicle's electrical system and 24 seconds after the pop it then chimed repeatedly saying to pull over immediately and come to a complete stop. The vehicle is currently at a nearby My safety: Once I was able to hobble the car off the side of the road, it left me in a dangerous situation. The vehicle was such in a state that the hazard lights were not operational and I had no way of getting any heat. (It was 20F with a wind chill down to 14F.) It also happened in a bad part of town, meaning that I did not want to leave the vehicle unattended for a tow truck. This also occurred 60mi from home. Reproduced: The dealership it was towed to is not open until Monday, February 9, 2026 but the tow's rescue battery made the system run enough to report the Diagnostic Trouble Code of "P1A9096". Doing a quick search online for that shows a number of cases with the same problem. While waiting for the tow, I tried to start the car a number of times to no avail. Inspected: Not yet, see "Reproduced" section above. Any other signs/symptoms? Nothing until the "pop" itself. Once that happened, basically every warning icon showed up on the instrument cluster/screen.

The ICCU (Integrated charging control unit) failed, causing my car to go into "Limp mode" where it was unable to accelerate over 44 mph. This put my safety at risk as I was unable to accelerate on the freeway. The Hyundai dealer confirmed the problem and it is still there, with no estimated time for repair due to a shortage of replacement part. It was not inspected by the police or insurance. There weren't any warnings or symptoms prior to the failure. Hyundai has issued recalls for 2022-24 models for this problem but not the 2025, although it appears they have not fixed this for 2025 models.

Vehicle experienced a dashboard alert, "Check electric vehicle system." The car produced an OBD code: P1AD3(00). Upon taking it to the dealer, they determined that the EV required a new high-voltage battery.

The ICCU component failed on me at 4,356 miles. Heard a pop with the car and then the dash started displaying electrical errors. To stop the vehicle and turn it off. The vehicle would not accelerate and would only go up to 25 miles per hour. Had to tow it to the dealership. Given a time frame of 30-60 days to receive the ICCU part for repair.

My Ioniq5 has experienced a recurring water leak that has repeatedly exposed the left rear seat belt and seat belt retractor to large amounts of water. I noticed recently that after it had rained the left back seat belt was soaked and dripping water when pulled out. After fully pulling out the belt as far as it would go it was clear that the water had fully soaked the belt and retractor. It is unclear when this started or how long this has been occurring, as there was no warning or other indication that there was a leak until the belt happened to be put on soon after it had rained. I am uncertain if this poses an actual risk to the function of the seat belt or seat belt retractor. However, even though it is unknown if the water intrusion limits the seat belt's function, there is a perceived risk that this could corrode or degrade the function of the internal components due to the repeated water exposure. The car was taken to the dealership twice. The first time they claimed they were unable to repeat the issue. However, days later it rained again and the belt and retractor were again soaked. After the second return to the dealership they were able to confirm a leak in the glass roof of the vehicle that was allowing the intrusion to the seat belt and retractor. The car is still currently at the dealer awaiting repair for the water leak with an unknown timeline

The ICCU failed. The car makes a loud pop sound and then the dashboard lights up. You are stranded wherever it fails because the car isn’t drivable after it happens. The car was inspected by the dealership. There were no warnings before it happened.

2:27 pm on 02/06/2026. Pop heard from the trunk area, then displayed "Stop vehicle and check power supply," the car lost power and then became completely immobile. The car has 3500 miles on it. Bluelink app showed "Everything looks good."

My new 2025 Ioniq 5 that has 8,700 miles on it suddenly popped up the message "check electric vehicle system" warning as we were driving in our neighborhood. My husband then realized that he could not drive over 30 mph just as he was merging onto our local Highway in a 65 mph zone. We limped along until the next turnoff and turned around. We decided to take the chance to get back onto the highway for a the short distance back to our house at 30 mph and returned the car to the garage. It was towed this morning to the dealership and declared to have a failed ICCU unit. All parts are back ordered indefinitely.

The ICCU (integrated charging control unit) failed on the vehicle, which resulted in the vehicle not being able to charge the 12v battery. The vehicle was no longer able to be driven after the ICCU failed.

The Integrated Charging Control Unit (ICCU) failed after just 7400 miles on 2-6-2026. The vehicle would not drive faster than 25 miles per hour and had to be towed to the dealership for repair, where it took approximately one month to be returned to me. There was a "Check electric vehicle system" message on the dashboard.

Car battery completely failed on a busy road.

- the iccu failed and was towed to the dealership and inspected by the service team. - the car needed to be pulled over to safety because of the failure, i had my daughter with me. - yes, the problem has been confirmed by a hyundai technician. - yes, a hyundai technician - i had 2 prior brief errors show on the dashboard that disappeared too quickly to read, not sure if they were related. about a month or two before the failure.

I heard a pop followed by an alarm notification stating the electrical system had an error. I had started the climate system but the car was parked.

Main battery failure, can not charge, can not drive car. Warning light(s) on dashboard. High voltage battery needs to be replaced.

12v Battery has died multiple times. Dealership says the battery is fine. 2025 with 16k miles.

The ICCU system's fuse failed.The car is currently with the dealership for repairs and could be available for inspection there if needed. The car was rendered inoperable and shut down while operating the vehicle. The abrupt breakdown could have been a hazard to the driver, passengers of the vehicle, and other drivers on the road. The issue was confirmed by the dealership's service technician. The vehicle has only been inspected by the dealership's service department at the time of writing. There was a warning just before the system/car shut down while driving. The warning sounded and said to "Stop vehicle and check power supply." This was the only time the warning appeared.

At a routine service visit to AutoNation Hyundai/Carlsbad, I received a good report on the 2025 Ioniq 5 condition. Starting the car to drive home I heard a pop sound and noted a diagnostic code that confirmed the ICCU and associated fuse had blown. Since then, Hyundai has been unable to clarify the ETA of the back ordered parts. They provided a loaner but it’s not an EV.

ICCU unit failed in parking lot leaving us stranded. Over 30 days to repair. Common issue. Luckily we weren’t on the road as the vehicle goes into a very short limp mode which may not allow time to get off a busy highway.

ICCU failure, car had to be towed to dealer. No loaner available, no eta on repair.

''Stop vehicle and check power supply'' At this point I heard a pop sound and the car died. The dealer said this is a ICCU problem.

I was on the highway going at approximately 60mph when the car without any warning reduced speed to first around 40mph and then to 20mph all within a matter of a few minutes, causing me to pull over to the side of the highway. Luckily, I wasn't injured. I exited the highway, called my insurance company Geico and had the vehicle towed to the dealership where I leased this brand new vehicle from just about 7 months ago on a 2year lease. The dealer was kind enough to provide a smaller loaner vehicle but had no idea when my car would be returned, as there were others with similar failures ahead of me that were waiting for the part to arrive. Apparently, this is a known failure issue of the ICCU that Hyundai has done a poor job of addressing. I continue to make my lease payments while waiting for the part to arrive. In the meantime, I wanted to let the government know of my experience and how this could have had a disastrous effect on my family and other families with a similar build.

ICCU failure. Towed to Vacaville Hyundai. Dealer diagnosed and confirmed ICCU failure. Barely got to parking lot - limp mode. Warning lamps: Check Electrical System. Also check 12v battery After parking: Stop vehicle and check power supply. message

The Integrated Charging Control Unit in our 2025 Ioniq 5 failed on vehicle startup. Fortunately the vehicle was parked when the part failed. There were no issues or symptoms prior to the failure and subsequent fault message. Failure of the ICCU has been confirmed by our local Hyundai dealer which is now in possession of the vehicle awaiting repair.

The 12V system battery failed to keep a charge and the vehicle slowly reduced maximum speed until it fully died causing the car to coast to a stop on a 55MPH highway. At 9,500 miles on the odometer the ICCU has failed. The part is on backorder and my car has been in the shop for three weeks with no estimated completion date. A LOT of IONIQ 5 owners are encountering the ICCU failure.

ICCU unit failed on 1/27/26, vehicle entered limp mode and is unusable. This is affecting thousands of Hyundai Ioniq 5 autos, and probably others as well. Due to the widespread problem, Hyundai is unable to give an estimate on finding a replacement part.

ICCU failed. ICCU fuse blew limiting power making car unsafe to drive.

The ICCU in my Hyundai Ioniq 5 failed catastrophically today ([XXX]) after only 3109 mlles. I believe this to be the case because: • I heard a loud pop from behind me in the car. • The car immediately lost power and would only go very slowly. • An alert about the electrical system immediately came on and told me to stop driving as soon as possible. • A rather loud alarm sounded. • DTC P1A9096 appeared in my Bluelink app. All these point to a failed ICCU. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I heard a loud pop and then the dashboard was flashing with a lot of warnings. The car slowed down to about 5 MPH and then eventually died and wouldn't turn back on

Battery electrical system, car gave warning to stop and park immediately , and stalled in the middle of the street while trying to make a turn, with no way to move it, or put it in neutral.

The ICCU was confirmed to have failed while I was driving.

Battery warning light went on as I left my house. Since this is an EV, naturally became concerned. Car was towed to Heritage Hyundai, Towson Md and I was later informed by the technician the ICCU went bad and this was a common problem for the Hyundai/Kia EVs which Hyundai/Kia have not fixed. The car is currently at the dealer's service department.

On Friday evening, my 2025 Hyundai Ioniq 5 was parked at a ferry terminal in central NJ in cold (~32°F), windy conditions near water. At approximately 6:20pm, I remotely activated climate control using the MyHyundai app. When I entered the vehicle around 6:25pm and attempted to start it, the dashboard immediately displayed “Stop vehicle and check power supply” and “Check electrical vehicle system.” The MyHyundai app reported diagnostic code PIA9096, which is widely reported by other owners as an ICCU failure. The vehicle became completely inoperable, could not be shifted into neutral, and could not be jump-started. I attempted boosting the 12V battery and AAA also attempted, with no success. Both AAA and Hyundai Roadside Assistance refused to tow the vehicle because it could not be placed in neutral, leaving me stranded in freezing conditions and forced to abandon the vehicle overnight in a public lot. The following morning, I installed a brand new 12V battery, which allowed the vehicle to power on, but the same electrical errors remained. The vehicle was then towed to a Hyundai dealer. After several days, the dealer confirmed diagnostic codes PIA961C, PIA9096, and P056216 and diagnosed failure of the ICCU and high-voltage fuse. The dealer ordered ICCU assembly 36400-1XAD5 and high voltage fuse 375F2-GI040. The dealer cannot provide any ETA for parts and stated the vehicle will be inoperable until repaired. I am informed by many other owners that multi-week or multi-month delays are common for this same failure nationwide. This failure resulted in a sudden, total loss of vehicle function, left me stranded in unsafe conditions, and made the vehicle impossible to move or tow normally. This appears to be a known, systemic defect affecting Hyundai EVs across multiple model years. Vehicle is currently at Hyundai dealer and available for inspection.

ICCU failure.

ICCU failed. Car has been sitting at service center for ~4 weeks. Luckily the incident took place at home but could have been anywhere. No warning prior to failure.

Failure of ICCU charging unit and Level 2 charging failure consistent with the description in this article [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Electrical system warning light came on and said to shut the car off immediately. The car was parked at the time and I was trying to start it. The 12V battery would not hold a charge after multiple items and the car was inoperable. The dealer has yet to provide any information but hinted at a likely ICCU issue.

While driving at normal city speeds, the vehicle suddenly displayed a warning message stating “Stop vehicle and check power supply,” accompanied by a red battery warning indicator. Shortly after the warning appeared, the vehicle entered a reduced-power or “limp” mode, with severely limited acceleration and speed. This created a safety concern as the vehicle could not maintain normal traffic flow. The high-voltage traction battery state of charge was normal at the time, indicating the issue was not related to battery depletion. Prior to the failure, there were no unusual driving conditions, accidents, or modifications to the vehicle. Ambient temperature was cool but within normal operating conditions. Due to the loss of power and safety risk, the vehicle was not driven further and was towed to an authorized Hyundai dealership for inspection. The problem was confirmed by the dealer, who diagnosed a failure of the Integrated Charging Control Unit (ICCU), which manages charging and power conversion between the high-voltage system and the 12-volt electrical system. The dealer determined that the ICCU requires full replacement. The vehicle remains at the dealership awaiting parts and is available for inspection. The failure resulted in sudden loss of drivability without prior meaningful warning, posing a potential hazard to the driver and surrounding traffic.

Backing out of a parking space, I heard a loud pop sound from the back of the cabin. A electrical warning showed in the dash to check the charging system. The vehicle was limited to 22 mph and I limped home. Just short of getting home, a warning alert sounded and the dash displayed an alert to stop the vehicle and park. Vehicle was towed to the dealer, who diagnosed it as an ICCU failure.

Vehicle is approximately 8 months old, has 9390 miles on odometer. While on a road trip, we stopped to charge the vehicle at a DC fast charging site. After about 10 minutes of charging, there was a loud pop sound and the vehicle stopped charging. Attempting to unplug and replug the charger into the car gave nothing but an error. Contacting support, was told that the vehicle has an air flap problem. That is not the problem. The charge controller system (ICCU) failed during charging, leaving the vehicle without power to charge the 12V battery system, and only enough driving power to limp 1 mile to a hotel. Vehicle required towing 400 miles to get to home dealership for repairs. Hyundai reps have stated that this 2025 vehicle is not part of the ICCU failures recall, but it is obviously exhibiting the same problems. I no longer have confidence this car can be driven any significant distance from home, which ruins the functional value of the vehicle.