Abstract: A vehicular anti-theft device has a clamping member for clamping the tire of a vehicle under pressure to prevent rotation of the wheel of the vehicle on which the tire is mounted. An actuating device mounted on the vehicle and coupled to the clamping member selectively moves the clamping member onto the tire to clamp the tire and away from the tire to release the tire. A control mounted in the vehicle and coupled to the actuating device includes the ignition switch of the ignition system of the vehicle. The control controls the operation of the actuating device to clamp the tire when the ignition is turned OFF and releases the tire when the operator of the vehicle provides a predetermined code indication.