WHILE PULLING INTO A PARKING SPACE VEHICLE SUDDENLY ACCELERATED UP TO THE SPEED OF 20 MPH, CAUSING VEHICLE TO RUN INTO A BRICK BUILDING. NO ONE WAS INJURED. AFTER REPAIRS WERE MADE, CONSUMER TOLD THAT THE FOUR WHEEL DRIVE SENSOR WAS CAKED WTIH MUD AND DIRT WHICH CAUSED IT TO LOCK UP, EVEN THOUGH THE VEHICLE HAD NEVER BEEN USED OFF ROAD TOTHE CONSUMER'S KNOWLEDGE. DEALER HAS NOT BEEN CONTACTED. *AK *ML