BMW 3 5 7 Series E36 E38 E39 Key Transmitter Receiver Module Unit 8379502

BMW 3 5 7 Series E36 E38 E39 Key Transmitter Receiver Module Unit is a component from the Electronic control modules and controllers category, responsible for authorizing engine start and interacting with the factory BMW security system. This solution is designed for users who want to restore the proper operation of the EWS system in their vehicle while maintaining the factory electronic architecture and consistency with the original vehicle software.

Specifications and technical data

• SKU: 8379502
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8379502
• Substitutable numbers: 61358379502, 8379502, 61358362337, 8362337, BG
• Category: ECUs & Computer Modules

Function and role of the EWS module in BMW

The presented EWS module plays a key role in the immobilizer system, controlling communication between the ignition switch, the key, and the engine control unit. It is responsible for verifying authorization to start the vehicle, which translates into increased security and stable operation of the starting system. Using a dedicated controller in BMW E36, E38, and E39 models allows for maintaining compatibility with the factory electrical installation and the logic of the security system.

Benefits of using an original control module

Choosing an original module from the Electronic control modules and controllers category ensures high compatibility with the vehicle's installation and predictable EWS system behavior. This helps avoid problems typical of replacements, such as bus communication errors, sporadic starting issues, or the need for wiring modifications. The module is prepared to work in the factory BMW electronics environment, which facilitates diagnostics, coding, and potential adaptation in conjunction with other controllers in the vehicle.

Application in service practice

This immobilizer controller is suitable both for standard replacement of a damaged module and for more advanced tasks, such as reconfiguring the security system or restoring vehicle functionality after EWS–ECU communication issues. In workshop practice, it helps reduce troubleshooting time because it maintains factory operating parameters and works with standard BMW diagnostic tools. This solution is particularly useful when servicing vehicles where consistency of electronics with the original manufacturer's specification is important.

Condition, origin, and selection by part numbers

The offered module comes from the BMW parts line and is a used component, which allows for optimizing repair costs while maintaining an appropriate level of quality. The product has an assigned OEM part number and associated interchangeable numbers, which facilitates precise selection for a specific vehicle configuration. Before purchasing, it is worth verifying compatibility by part numbers as well as the year and equipment version of the car to ensure seamless integration with the existing installation.

Technical support and electronics selection

If you want to better understand how to safely choose used controllers, EWS modules, and other electronic components, how to check compatibility by OEM numbers, and what the installation and adaptation process looks like, use the advice contained in the article: Used automotive electronics – a guide to selecting modules and sensors. It is a practical source of knowledge that will help reduce the risk of a wrong purchase and facilitate cooperation with a service center or auto electrician.

If you are planning a comprehensive repair or upgrade of the control electronics area in your BMW and need other elements from the same group, such as comfort modules, engine controllers, or other vehicle system management units, check the available parts in the BMW electronic control modules and controllers category.