4100188 BMW Rover 75 MG ZT EWS 3 Immobiliser Control Module – OEM Used & Tested

Описание

This BMW EWS 3 immobilizer control module is a genuine OEM anti-theft component for BMW vehicles and for the BMW-engineered Rover 75 and MG ZT. Primary OEM number 4100188. It is designed to read the transponder in the ignition key, verify the stored key code and release the engine control unit, so that the engine can only be started with a correctly coded original key. It works together with the ignition lock and the engine management of the same car.

Its job is to authenticate the key, exchange a secure rolling code with the engine control unit and enable the starter and fuel injection only when the code is valid. A properly working EWS 3 module supports reliable starting, full theft protection and correct operation of the immobilizer system between the key, the ignition lock and the engine management.

Common signs of a faulty unit include no start with the immobilizer light on, keys that are not recognized, intermittent starting, an engine that stalls right after starting and stored faults about the key or engine control communication. When the module fails, the immobilizer may block the engine, which leaves the Rover 75, MG ZT or BMW stuck until the system is working again with a good module.

This is a used original part, removed from a vehicle and tested before sale. Match the exact OEM number 4100188 before ordering. Professional installation is recommended, and EWS alignment with the engine control unit, key programming or coding is usually needed where applicable, because the module is paired to its original vehicle.