2025 Kia EV9 Powertrain & Transmission Problems

I am submitting a safety complaint regarding a serious incident involving my 2025 Kia EV9. The vehicle was serviced on March 1 at World Kia in Joliet, Illinois. On April 4, only four days after that service, the vehicle experienced a sudden and unexpected ICCU failure while I was driving. During my normal travel, in active traffic and at speed, the vehicle abruptly entered limp mode and displayed multiple system warnings. This caused an immediate and significant reduction in power, creating a hazardous situation for myself and surrounding drivers. I was forced to maneuver the vehicle out of traffic while it was rapidly losing propulsion capability. The vehicle is currently at Berwyn Kia in Berwyn, Illinois for diagnosis and repair. I am reporting this incident due to the clear safety implications of a sudden loss of power during highway driving operation. A failure of this nature poses a risk of collision, especially in high‑speed or congested traffic conditions. I am requesting that NHTSA review this issue as part of its ongoing monitoring of Kia/Hyundai/Genesis Integrated Charging Control Unit (ICCU) failures and related safety concerns. Thank you for your attention to this matter.

The Kia EV9 Wind I bought several days ago worked fine for a couple of days with a slight vibration, but yesterday I experienced 3 incidents. 1. As I was coming to a full stop at a stop sign, there was a mild grinding noise from the rear of the vehicle. 2. I continued for 100 yards and came to a stop light and the car made a louder grinding sound of gears grinding as I was coming to a full braking stop. 3. I continued for about 1/2 mile. As I was coming to a stop at a stop light, there was a very loud grinding sound from the back of the car, like gears were being stripped, and the vehicle came to a full stop. At that point I was in the middle lane of a busy 3 lane road. I jumped out to inspect and saw nothing. I continued through the intersection and immediately pulled into a parking lot. I got out to inspect and there was a very strong burning smell coming from the driver side rear wheel well. I did not smell it on the passenger side rear wheel well. I had it towed to the nearby Kia dealership, and left it. This morning the dealership reported the initial diagnosis showed that the emergency brakes were activated while I was driving and they would report back later today on further diagnosis. They said the brake pads and rotors may need to be replaced and they would need to determine why the emergency brakes activated while I was driving. When I told them I was equally concerned about the grinding sound and the possibility of stripped gears, they replied that Kia Corporate does not pay them to explore potential problems that are not visible or obvious. My main concern is that there may be stripped gears to be replaced in addition to a software or other fix to prevent the emergency brakes from activating while driving. They also reported to me that there were 2 notifications with updates that had not been performed. One was for a software update for the rear powertrain and the other was for a sunroof issue and they would perform both.