An occupant position sensor (110-114, 215) using either ultrasonic, microwave or optical technologies, or seat belt spool out (501) and seat position sensors (601), are used as inputs to the primary vehicle crash sensor circuit to permit the longest possible sensing time before the occupant gets proximate to the airbag (104) and is in danger of being injured by the deploying airbag. The sensor further disables the inflatable restraint system (104) if the occupant is in danger of being injured by the system deployment. Separate systems are used for the driver and passenger to permit the optimum decision to be made for each occupant.