Transponder Keys and Immobiliser Systems

Immobiliser Systems
To reduce vehicle theft, legislation was introduced that required all cars made and sold in the UK after 1995 to be fitted with an immobiliser system. The system works by matching a transponder key with an embedded and encrypted electronic signature code. The key code is read and must match the vehicle immobiliser signature or the vehicle won't start.

Broken Transponder Keys
If the embedded key chip is broken or faulty then the vehicle won't start even with the correct key and a new re-coded transponder key is needed.

Remote Locking

The key microchip can send a security code either via an infra-red or radio transmitter that is received by the central locking system to unlock the doors.