2025 Hyundai Ioniq 5 Fuel System Problems

Your car's Integrated Charging Control Unit (ICCU) — the component that manages charging and power conversion — failed completely at fewer than 3,000 miles, leaving your vehicle unable to drive or charge. Warning lights appeared on your dashboard before the total loss of power. The dealership and Hyundai confirmed this is a defect that cannot be repaired. Fixing this issue will require replacing the Integrated Charging Control Unit.

ICCU failed less than 5k miles into my lease. I am now no longer able to drive the vehicle and there is no eta on getting a replacement since it’s on back order

ICCU failure while driving my kids to school. Heard pop sound and then dashboard showed electric system failure, car went limp mode and finally died on side of the road

ICCU failure

Traveling on Highway at 65 mph the vehicle suddenly lost speed and would not respond when my foot pressed on the acceleration pedal. I made it off the freeway to the exit. I turned the EV off and on and the car accelerated until I came to a stoplight. Again the car acceleration pedal would not respond. I put on my flashers and returned to the vehicle. I turned the car off and restarted it and was able to drive it home on side streets. I did not want to get back on the freeway. I had the car towed to the Hanlee Hilltop Hyundai in Richmond California. They performed a computer check and no error code came up except for an external charger error code. Our Ioniq 5 is charged with our wall box charger and has performed with no problem. It has worked with our Kia Niro EV also without problem. I fear there is a problem with this Electric Vehicle and do not feel safe driving it. I have initiated a buy back with Hyundai. I wanted to report the problem to this government agency in case there is a larger safety problem with this model year.

I notice a strange pulsing/hesitation when accelerating at partial throttle (maybe 10-25%) between 60-65MPH. It's quite alarming, because it feels like the electric motor is cutting out momentarily. I notice the same pulsing/hesitation during regenerative braking at the same speeds (as with the acceleration, it is only noticeable at partial regen). The dealer confirmed that they've noticed the same behavior on other new Ioniq 5 vehicles, but they don't have a fix. I don't know the safety implications, but I worry about the electric motor cutting out and affecting my ability to control the car during acceleration or regenerative braking.

The high-voltage traction battery on my 2025 Hyundai Ioniq 5 Limited RWD failed unexpectedly around [XXX], when the vehicle had approximately 1,250 miles on it and was just over 3 months old. The car had been parked in my driveway with about 80% charge while I was away for several days. When I attempted to drive it, the vehicle would not shift out of neutral. No warning lamps or error messages were displayed before the failure. The vehicle was towed to Van Hyundai in Carrollton, TX on April 3. While loading it onto the tow truck, the 12V battery completely died, disabling the electronic parking brake and preventing the vehicle from being safely secured. After an extended wait, a Hyundai field service technician diagnosed the failure as a fault in the traction battery, requiring a complete replacement. I was told the part is currently unavailable and has no estimated arrival time. The issue has been confirmed and documented by the dealer and the field technician. This failure renders the vehicle undriveable and puts both safety and financial reliability at risk. Not only was I unable to move or secure the vehicle, but it has also been out of service for over two months with no resolution in sight. The failed component is currently in possession of the dealership and should be available for inspection upon request. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)