The contact owns a 2006 Ford Mustang. The contact stated that she purchased a vehicle that was not working. The contact had the engine replaced by an independent mechanic. While starting the vehicle, the air bag warning light illuminated. The contact received notification of NHTSA Campaign Number: 15V319000 (Air Bags) and 19V001000 (Air Bags). The vehicle was repaired at the local dealer, but the failure recurred. The dealer informed the contact that a diagnostic test was needed. The manufacturer was contacted and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 230,272.