TRUCK IN 45MPH HEAD ON COLLISION WITH ANOTHER VEHICLE, AND AIR BAGS FAILED TO DEPLOY. DRIVER SAVED BY SEAT BELT ONLY. TRUCK TOWED FROM SCENE AS CURRENTLY AT DEALER FOR REPAIR. WILL BE WATCHING TO SEE IF DEALER MAKES AIRBAG/SENSOR SYSTEM REPAIR/ADJUSTMENT, OR RETURNS TO OWNER AFTER BODY/ENGINE/OTHER REPAIR WITH SAME FAULTY PASSIVE RESTRAINT SYSTEM UNFIXED.*AK