what is an anti-theft device on a car
Anti-theft system In the case of vehicle theft, the best deterrent to theft is in the installation of an approved vehicle anti theft passive immobilizer. Many vehicles have OEM (factory installed) units and afford protection through the ignition system. OEM immobilizers function through the ECM/PCM (computer) under the hood of the vehicle. In general terms, the RFID tag attached to the key must be read by the ECM in order to allow ignition to occur. Unfortunately, organized crime thieves are able to bypass these systems and steal any vehicle at will. An approved immobilizer uses a 3 circuit isolation system which thwarts even the most experienced thief.