Abstract: A vehicle anti-theft device includes a number of code input switches incorporated into the electrical system for the vehicle engine. The switches are controlled at the driver's station, for example, by being mounted on an automobile dashboard. Each of the switches is a multi-position switch having an alpha-numeric indicia indicator, to indicate the particular position of the switch. Starting the engine requires that the switches first be set to a predetermined code configuration in order to complete the electrical circuits necessary for starting the engine. Means also are provided to self-disable the electrical circuit when the engine is shut off to require that the switches be reset in a predetermined manner in order to restart the engine.