My 2022 Kia Carnival, approximately 80,000 miles, had intermittent dashboard warning lights and grinding brake noise for a few weeks. I brought the vehicle to Tasca Kia White Plains first time on 4/14/26 then again on 5/8/26. The dealership initially could not reproduce the issue, then later suspected an ABS sensor issue and ordered the part. On 5/12/26, before the repair was completed, I was driving downhill with my children in the vehicle when the brakes failed to respond properly. I had to steer off the roadway and go over rocks/boulders to stop the vehicle. At that time, the brakes would not respond normally, and I could not immediately shift the vehicle into Park. Police and towing services were involved. The dealership later replaced an ABS sensor. However, when I reviewed the codes with the service manager, I was told the ABS sensor code did not appear on the date of the brake incident. I was also told that an ABS sensor failure itself would not typically cause hydraulic brake failure. I am concerned that the sensor replacement does not explain the brake failure and that this may involve a brake/ABS/electronic stability control safety issue.