NHTSA Complaint #11716352 — 2024 KIA EV6

Driving with my wife and [XXX] child, there was a pop sound from under the car, and the car suddenly showed multiple faults, including "Check electric vehicle system”, which cleared on their own. I parked and turned the car off and on again and the faults reappeared. I started driving home, and during the drive it showed "Stop vehicle and check power supply" and audibly alarmed. As I was only half a mile from my house on local quiet roads, I made it. A few minutes later, I tried to turn on the car and some displays were off, there was no drive power, the steering wheel did not turn, the door locks were flakey, and I wasn't able to tell if I had shifted into Park or if the parking brake was engaged. When the tow truck arrived, the car was completely unresponsive and there was no way to release the parking brake or shift the car in neutral, so the car was dragged across the pavement and onto the tow truck. The failure was quick and comprehensive and could have easily caused injury. There are many highways near me with fast, busy traffic and either no emergency shoulder or a very narrow one. If my car tells me that I need to stop the vehicle, that can create a very dangerous choice between stopping somewhere less safe quickly or risking the car being completely disabled while in the travel lane while I look for a safer spot. Loss of cabin heat can easily become dangerous very quickly in the winter. Many drivers may not even understand the urgency of the warning until the car starts failing to drive. The car is at a Kia dealership for repair who confirmed an ICCU failure. See related NHTSA recall no 24V-867 and others. ICCU failures are endemic to Kia and Hyundai EVs. ICCU failures are widely discussed on many internet forums and seem much more common than the 1% failure rate claimed by Hyundai/Kia. FYI, an interesting root cause analysis was shared on a German EV forum: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)