TL* THE CONTACT OWNS A 2013 SUBARU IMPREZA. THE CONTACT STATED THAT WHILE DRIVING 4 MPH IN REVERSE, THE VEHICLE RAPIDLY ACCELERATED IN REVERSE. THE CONTACT WAS UNABLE TO STOP THE VEHICLE, AS IT PROCEEDED TO CRASH INTO A BOULDER FOLLOWED BY A TREE. THE REAR BUMPER WAS DAMAGED HOWEVER, THERE WERE NO INJURIES AND A POLICE REPORT WAS NOT FILED. THE CONTACT STATED THAT THE FAILURE OCCURRED TWICE, INITIALLY IN NOVEMBER 2013 AND AGAIN IN FEBRUARY 2014 WHILE IN REVERSE. THE MANUFACTURER WAS CONTACTED AND OFFERED NO ASSISTANCE WITH REPAIRING THE VEHICLE. THE FAILURE MILEAGE WAS 6,300 AND THE CURRENT MILEAGE WAS 7,000.