Tl the contact owns a 1999 buick park avenue. the contact stated that the vehicle suddenly accelerated while backing out of the driveway and failed to brake. when the vehicle was started, the contact heard a loud popping sound and noticed a lot of smoke coming from the tailpipe. as a result, the vehicle crashed into the neighbor's yard and a telephone guide wire. an independent mechanic was called to have the vehicle towed and diagnosed. there were no injuries and a police report was not filed. the dealer and manufacturer were not contacted. the failure mileage was 152,000.