a vehicular automatic occupant sensing anti - carjacking system primarily designed to automatically and continuously protect a vehicle from carjacking and to provide preventive protection to the authorized occupant of the vehicle from being taken hostage in their own vehicle and to facilitate the recovery of a vehicle during a carjacking regardless , whether the vehicle is occupied or unoccupied , regardless , whether the vehicle is attended or unattended , regardless , whether the ignition is on or off and regardless , whether the engine is running or not running . the system includes an electronic command control unit which communicates with a plurality of sensors to provide the necessary input signals to the command control unit . the system has a means for automatically monitoring and determining the occupancy status of the vehicle via pre - programed occupancy status instructions . if the occupancy status of the vehicle deviates materially from the pre - programed occupancy status , at any time , vehicle disabling means and alarm means are automatically actuated . also included in the system are means for automatically disabling the vehicle , as well as , automatically enabling the system to facilitate use of the vehicle by the authorized occupant . once programed , the system operates automatically requiring no manually operable activation of any hidden switches , remote signalling devices , buttons or other manually operated actuators .