How does Electronic Engine Immobiliser work?

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How does Electronic Engine Immobiliser work:

An advanced electronic Engine Immobiliser system within the latest cars uses rolling/changing security codes. this method featuring in BMW cars which consists of Two-Tier security. A permanent personal code and changing the second code. when the key starts the engine, the system changes the second code and stores it within the key. Whenever the motive force switches on the ignition, the immobilizer first reads the private code. Then, it requests for the second rolling code.


After both these codes match, only then the immobilizer sends another coded signal to the Engine Management System to unlock the engine. Without this, the engine doesn’t start. within the absence of the second security code, still, the engine won’t start whether or not someone tries short-circuiting the ignition circuit. Thus, it prevents vehicle theft.


Since the transponder chip is embedded within the key or Smart Key fob, it can not be easily duplicated. just in case of loss of the key or Smart Key fob, only the authorized dealers can deactivate the lost key. They will arrange for a brand new key from the manufacturer after verifying the customer’s credentials.

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