TL*THE CONTACT OWNS A 2002 DODGE RAM 1500. WHILE THE VEHICLE WAS PARKED WITHOUT THE KEY IN THE IGNITION, THE VEHICLE ROLLED DOWN A HILL. THE VEHICLE CRASHED INTO A TRAILER AND BOTH WERE DAMAGED. THERE WERE NO INJURIES. THE CONTACT RECEIVED A RECALL NOTICE FOR THE IGNITION INTERLOCK AFTER THE FAILURE OCCURRED. THE IGNITION INTERLOCK WAS REPLACED. THE PARKING BRAKE WAS NOT ENGAGED. THE APPROXIMATE FAILURE MILEAGE WAS 75,000 AND CURRENT MILEAGE WAS 80,125.