2024 Hyundai Ioniq 6 Complaints

I was driving on the highway, 65mph when I had a sudden loss of power, check electrical system warning and a battery picture came on. I was reduced to approx 10mph suddenly in rush hour traffic, in the left lane, with no shoulder to pull over to. I was able, with the kindness of other drivers slowing down, able to move to the right lane, then to the shoulder. Called AAA for tow to dealership. 12v battery and ICCU damage.

Vehicle steering wheel was off-center and the vehicle wandered whenever the road changed camber or had rough sections. The vehicle was purchased used from Carvana,. I took it in for 4-wheel alignment and the tech reported that "All adjustment hardware at rear were pretty loose", and stated that it probably left the factory this way as he saw no evidence of prior adjustments. The left rear tire is badly worn on the outside and he recommended immediate replacement, which is awaiting warranty claim processing. Possible safety issues: Rear tire blowout, rear suspension alignment failure with loss of control.

ICCU failed. The car suddenly decelerated from 40mph to 25mph or less with no warning. The ICCU is confirmed to be an issue for Hyundai. I had the software update to fix the problem in 2025. It is currently at the dealership in Fort Mill, SC. DTC error code shows it as an ICCU failure. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? There were no warning lamps to until the failure occurred.

After several days of below freezing temps, started car after work and received "check electrical systems" warning. Couldn't drive above 15-25 mph. Eventually led to total shutdown, could not start, lock/unlock doors, etc. Had to tow to dealer which they eventually deemed the ICCU to be at fault. 12v battery was dead and new battery they put in to test died it sounds like as well. Or they "recreated the problem" was their words after trying to claim it was only a bad 12v battery.

Driving 65 on the highway, the ICCU popped and died and the car immediately went into slow mode and decreased to 20mph in traffic in the snow. It displayed a message to pull over immediately and check the power system.