TL*THE CONTACT OWNS A 2004 TOYOTA SIENNA. WHILE THE CONTACT WAS DRIVING 5 MPH ATTEMPTING TO PARK INTO A PARKING SPACE, THE VEHICLE HAD SUDDENLY ACCELERATED WITHOUT WARNING CAUSING THE CONTACT TO CRASH INTO A NEARBY GATE. NO ONE WAS INJURED AND A POLICE REPORT WAS NOT FILED. THE VEHICLE WAS TAKEN TO THE DEALERSHIP WHERE THE CONTACT WAS INFORMED THAT THE VEHICLE WAS OPERATING NORMALLY. THERE WERE NO PRIOR WARNINGS. THE VIN WAS NOT AVAILABLE. THE CURRENT AND FAILURE MILEAGES WERE 12,500.