The contact owns a 2025 Hyundai Palisade. The contact stated that while driving at 5 MPH from making a right turn and attempting to stop the vehicle for a traffic light, with the brake pedal depressed all the way to the floorboard, and the vehicle failed to stop. As a result, the vehicle crashed into the rear of the vehicle in front before coming to a complete stop. The air bags did not deploy. No warning lights were illuminated. A police report was not filed, and no injuries were reported. The vehicle was taken to the dealer, who was unable to diagnose the failure. The vehicle was not repaired. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA hotline for assistance. The failure mileage was unknown.