The contact owns a 2005 Ford Ranger. The contact stated that upon arriving to the residence and applying the parking brake and exiting the vehicle, the vehicle started to roll backwards. The contact stated that the vehicle came to a complete stop after rolling across the street and through the neighbors fence. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 223,000. The VIN was not available.