Initially, the immobilizer was a separate unit of the car’s security system that was reading the key information and unlocked the electronic systems of the car if it was the car’ s key, but now for some models this function is taken by other modules such as comfort module, watches, electronic contact.

To change the immobilizer, you need to match it with all the other car units by using a professional tester or by copying the software from the car’s original software to the bought one, if it is possible.