Answer
Jun 02, 2023 - 02:54 PM
Your 2006 BMW LI 750 is equipped with an immobilizer system, a security feature designed to prevent unauthorized access and theft of a vehicle. It works by electronically immobilizing the engine or preventing it from starting unless the correct key or key fob is used.
The system consists of two main components: a transponder chip embedded in the key and an immobilizer control unit in the vehicle. When the key is inserted into the ignition or brought near the vehicle, a communication takes place between the transponder chip and the immobilizer control unit. The transponder chip sends a unique identification code to the control unit, which then verifies if the code matches the authorized code stored in its memory.
If the correct key is used, the immobilizer control unit allows the engine to start. However, if an incorrect or unauthorized key is used, the control unit will prevent the engine from starting by disabling the fuel supply or ignition system.
In some cases, a vehicle might display a message pointing out that the wrong key is used, even when the owner is using the correct key. There could be a few reasons for this:
- Key Malfunction: The key or key fob might have a malfunction, such as a weak battery or a damaged transponder chip, which could result in the vehicle not recognizing it properly.
- Immobilizer System Malfunction: There could be an issue with the immobilizer control unit or the wiring connecting it to the key reader or ignition system. This can lead to incorrect communication or failure to recognize the key.
- Duplicate Key: If a duplicate key is used that hasn't been properly programmed or authorized by the vehicle manufacturer, the immobilizer system may reject it, even if it physically looks identical to the original key.
