Abstract: A vehicle anti-theft device for controlling the operation of an electric fuel pump in the fuel tank of motor vehicles which includes a relay that is located in the fuel pump assembly and controlled by a radio-frequency receiver. The radio frequency-receiver is controlled by an input signal transmitted from a hand-held remote transmitter. As a safety precaution, an under-dash relay is provided so that system switching can only occur when the ignition switch is off. The relay in the fuel pump assembly also controls the illumination of an indicator light in the dashboard of the vehicle which indicates fuel pump status to the vehicle operator. Also mounted in the dashboard of the vehicle is an emergency plug into which the hand-held remote control transmitter can be inserted if the battery therein runs down.