BMW E81 E87 E90 Hands-Free Electronics Charging Module MULF 6938943

BMW E81 E87 E90 Hands-Free Electronics Charging Module MULF is an original component from the Electronic control modules and controllers group, designed for the integration of telephony and connectivity systems in selected BMW 1 and 3 Series models. This used module allows for the restoration of efficient Bluetooth communication, ensuring stable cooperation with the factory multimedia system and steering wheel controls.

Specifications and technical data

• SKU: 6938943
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6938943
• Substitutable numbers: 84216946393, 6946393, 84109111718, 9111718, 84109154358, 9154358, 84106975173841069726788421693633284106965406, 6975173697267869363326965406, 84216933284841069530448421693878484216933283, 6933284695304469387846933283, 841069583698421693894384216948404, 84106972678, 6972678, 84106975173, 6975173, 84106958369, 6958369, 84106953044, 6953044, 84216938943, 6938943, 84216938784, 6938784, 84216937609, 6937609, 84216936332, 6936332, 84216933284, 6933284, 84216933283, 6933283
• Category: ECUs & Computer Modules

Purpose and function of the module

The presented Bluetooth controller is responsible for handling wireless communication between the phone and the BMW onboard electronics. It enables hands-free operation, phonebook integration, and call management via the car's buttons. This provides the driver with convenience and improved safety, while the vehicle maintains the full functionality of the factory connectivity system. As a component from the Electronic control modules and controllers family, the module works with the vehicle's bus, transmitting signals to the multimedia unit and other controllers. Properly selected according to the manufacturer's markings, it helps avoid compatibility issues and communication errors within the vehicle's network.

Benefits of using an original BMW module

Using an original BMW Bluetooth controller results in:

• maintaining factory connection quality and data transmission stability,
• proper cooperation with existing vehicle equipment,
• no need for installation modifications or additional wiring,
• aesthetic integration – the module is mounted in the location intended by the manufacturer. For users who expect consistent operation of all onboard systems, choosing an original module is a more predictable solution than universal aftermarket kits. This is particularly important in vehicles where many comfort and safety functions are interconnected.

Condition, selection, and compatibility

The offered item is used, which allows for an economical repair of the connectivity system while maintaining the original manufacturer's specifications. Before installation, it is recommended to verify compatibility using the OEM part number and interchangeable numbers to ensure that the module will work with the specific vehicle equipment configuration. The selection of the controller should be based on data from the onboard computer, service documentation, or information from a specialist dealing with BMW electronics. In many cases, adaptation or coding of the module to the car may be necessary, so it is best to entrust the installation to a workshop equipped with appropriate diagnostic software.

Professional approach to used electronics

When purchasing a used Bluetooth controller, a conscious approach to automotive electronics is key – from verifying markings and assessing the condition to proper installation and potential programming. To better understand when choosing a used module is justified and how to minimize risks, it is worth reading the guide: Second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?

Expanding the control system in BMW

If you are planning a comprehensive repair or upgrade of the onboard electronics area in your BMW and need other components from the same group, such as comfort modules, multimedia system controllers, or connectivity management units, check the available parts in the BMW electronic control modules and controllers category. Additional information on how to consciously use original used parts in vehicles of this brand is also provided in the article: BMW – sports performance and precision. How do original used parts extend the life of the Bavarian icon?