Abstract: An anti-theft device for a motor vehicle wherein a personal identification unit is carried by an authorized operator of said motor vehicle and includes means for identifying its location in the vicinity of the motor vehicle. A vehicle control unit mounted onto the motor vehicle, has a first and second condition with means for allowing operation of the motor vehicle when the control unit is in the first condition and means for inhibiting operation of the motor vehicle when said control unit is in the second condition and means for shifting the control unit into the second condition at a time subsequent to removal of the identification device from the vicinity of the motor vehicle.

Abstract: A vehicle anti-theft device in the form of a vehicle steering wheel lock comprising extendable and retractable members having hooks that are on for engaging diametrically opposed portions of a steering wheel to mount the anti-theft device on the steering wheel. It is provided with a motor operated lock mechinism remotely controlled by a personal identification encoder. The lock mechinism also includes a key operated portion, and the lock mechinism is operable either through the use of a key or through the use of the remotely controlled encoder.