general problems of the 2001 Ford F-450

The drivers seat belt disengaged, causing the consumer to drive with the seat belt unlocked. The seat belt was repaired three times and failed three times(ongoing problem), the brake problem was repaired three times and failed three times, the front/rear brakes would not disengage on repeated occasions the problem continued, the front and rear tires would shake and or vibrate which was due to a tire defect per dealer. There were flat spots on the tires. (the tires were sold with the vehicle) continental/general.