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What is a Ghost Immobiliser? A Ghost immobiliser is a discrete vehicle security system that shields your vehicle from key cloning and hacking. It is extremely difficult to bypass, and is an excellent supplement to any security system, like an tracking device or alarm system. It uses the buttons built into your steering wheel or center console to allow you to create the PIN code sequence. This code is saved on the device and can be used to disarm your car in valet mode.