Abstract: Digital code-controlled ignition and security system for a vehicle, including an alcohol-detector device for preventing ignition in presence of predetermined alcohol content in the breath of the operator. Apparatus includes digital module which is programmable to desired first ignition mode code and second security mode code. Ignition coil/distributor and starter solenoid/motor are deenergized in absence of proper ignition code, and starter solenoid/motor remains deenergized in absence of alcohol-detector approval. Alarm system is armed by security code, activated by any one of a plurality of detectors and cannot be deactivated until another code is entered into digital module. Remote transmitter/receiver is provided to activate alarm for testing or vehicle-location purposes, and to receive signal at remote location when alarm has been activated.