The contact owns a 2020 Lincoln Aviator. The contact stated that after pulling into a parking space on a hill, the parking brake was engaged. and the vehicle was turned off. However, after exiting, the vehicle rolled back and crashed into two vehicles: an Audi A4 and a Kia Borrego. There were no warning lights illuminated. There were no reported injuries, fire, police report, or air bag deployment. The vehicle was taken to the local dealer, where it was diagnosed that the brakes and transmission failed, which caused the vehicle to roll backward. The vehicle was not repaired. The manufacturer was not contacted. The approximate failure mileage was 47,375. The Lincoln app informed the contact via a notification that the power train malfunctioned and reduced power.