NHTSA Complaint #11078476 — 2016 TOYOTA 4RUNNER

VEHICLE WAS PARKED IN MY DRIVEWAY WHICH HAS A MODERATE SLOPE. ENGINE WAS NOT RUNNING. DESPITE BEING IN PARK, THE VEHICLE ROLLED DOWN THE DRIVEWAY AND ONLY STOPPED WHEN IT HIT MY MAILBOX AT THE CURB. I COMPLAINED ABOUT THE MATTER TO TOYOTA. THEY INSPECTED THE VEHICLE AND CONCLUDED "WE DID NOT FIND EVIDENCE OF A DEFECT WITH THE TRANSMISSION OR SHIFT SELECTOR [SIC] CAUSED THIS INCIDENT." THE VEHICLE HAD BEEN SITTING THERE FOR AT LEAST 10 MINUTES. THE PARKING BRAKE WAS NOT SET. I DID NOT BUMP THE SHIFT LEVER OR DO ANYTHING ELSE THAT COULD HAVE CAUSED THE VEHICLE TO COME OUT OF PARK. I SPOKE WITH THE TOYOTA ENGINEER WHO INSPECTED THE VEHICLE AND HE TOLD ME HE COULD NOT EXPLAIN WHAT HAPPENED. I AM CONCERNED THERE IS A SAFETY DEFECT WITH THIS VEHICLE. OBVIOUSLY, I WILL ALWAYS USE THE PARKING BRAKE IN THE FUTURE. ATTACHED IS TOYOTA'S LETTER TO ME SAYING THEY DID NOT FIND A DEFECT AND MY LETTER IN RESPONSE. THANK YOU FOR YOUR ASSISTANCE.