Side/window Air Bag problems of the 2007 Volkswagen GTI

The contact owns a 2007 Volkswagen Gti. When a passenger is seated in the front passenger seat, the air bag sensor light constantly illuminates and displays "passenger side air bag is off". The dealer stated that the wiring harness needed to be replaced. The replacement was made, but the failure persisted. The vehicle was taken back to the dealer and the seat tensioner was replaced. The failure persisted as well. While driving less than 60 mph, the check engine light illuminated on the instrument panel. The weather stripping on the passenger side was replaced three times, in addition to the sunroof once. The vehicle was taken back to the dealer for repairs. The failure mileage was 10,000 and current mileage was 41,000.