There are two types of immobiliser:

Cuts a vital electrical circuit off preventing the engine from being started. LAST DOOR ARMING:

An immobiliser is either: an electronic anti-theft device that helps stop the engine being started. Usually activated when you remove the ignition key. Usually factory-fitted by the manufacturer but may be retro-fitted and supplied with certificate of installation

an immobiliser is a piece of electronic theft prevention equipment that is wired into your car’s engine and ignition system. When the immobiliser is active, you can’t start the engine – even with the key.

is an electronic security device fitted to a vehicle that prevents the engine from running unless the correct key or other ignition activation device is present. This is a security feature and many in [..]