VEHICLE FAILED TO STAY IN PARK AND SHIFTED TO REVERSE WITH ENGINE RUNNING, STRIKING A PARKED VEHICLE. VEHICLE WAS SERVICE ON 6/15/00 FOR RECALL 871, WHICH IS FOR THIS EXACT PROBLEM. NO PROOF WAS EXHIBITED TO OWNER DURING INSPECTION ON 10/26/00 THAT VEHICLE WAS PROPERLY SERVICE FOR RECALL 871. VEHICLE IS CONSIDERED UNSAFE FOR DRIVING SINCE IT IS UNKNOWN WHAT CAUSED THE VEHICLE TO SHIFT OUT OF PARK AND INTO REVERSE.*AK