TL* THE CONTACT OWNS A 2012 HYUNDAI TUCSON. THE CONTACT STATED THAT AFTER PLACING HER VEHICLE IN PARK AND EXITING THE VEHICLE, IT ROLLED BACKWARD AND CRASHED INTO A BUS. NO POLICE WERE CONTACTED. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THEY ADVISED HER THAT THEY WERE UNABLE TO DIAGNOSE THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED AND THEY OFFERED NO ASSISTANCE. THE FAILURE MILEAGE WAS APPROXIMATELY 1,000.