BMW 1 3 Series E81 E87 E90 E91 Hands-free Electronics Charging MULF2 9132539

BMW 1 3 Series E81 E87 E90 E91 Hands-free Electronics Charging MULF2 is an original component from the Electronic control modules and controllers group, designed for factory multimedia installations in BMW 1 and 3 Series vehicles. It enables stable wireless communication between the car and mobile devices, ensuring convenient operation of phone and multimedia functions from the onboard system.

Specifications and technical data

• SKU: 9132539
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9132539
• Substitutable numbers: 84109123290, 9123290, 84109226711, 9226711, 84109215184 84109128722 84109163348 84109195246, 9215184 9128722 9163348 9195246, 84109178862 84109132539 84109200821 84109221029, 9178862 9132539 9200821 9221029, 84109204545 84109147516 84109149656 84109181378, 9204545
• Category: ECUs & Computer Modules

Module purpose and function

The presented Bluetooth controller is dedicated to BMW vehicles equipped with factory communication and infotainment systems. As an element of the electronic installation, it is responsible for handling wireless connections, integrating the phone with the hands-free system, and working with the factory radio or navigation system, depending on the vehicle's configuration. By using an original module from the same family of controllers, full compatibility with the vehicle's bus is maintained, which minimizes the risk of communication errors and coding issues. This solution is particularly recommended for repairs of comfort and multimedia systems in E81, E87, E90, and E91 models.

Benefits of using an original BMW controller

Choosing a factory Bluetooth module from the Electronic control modules and controllers group allows for maintaining the consistency of the entire vehicle's electronic system. The module's software is prepared to work with the head unit, instrument cluster, and other controllers in the car, which facilitates diagnostics and potential updates. The most important advantages of this solution include:

• maintaining the original functionality of the hands-free kit and phone operation,
• proper cooperation with factory buttons on the steering wheel and center console,
• consistency with the vehicle's electrical architecture and BMW service procedures,
• possibility of clear identification in computer diagnostics.

Product characteristics and fitment

The module belongs to the Electronic control modules and controllers category, which means it is an integral part of the car's controller network. In practice, this means it must be correctly selected based on the equipment version and multimedia system configuration. The product has an assigned OEM part number and a set of interchangeable numbers, which facilitates matching it to a specific vehicle using BMW catalogs or VIN tools. The item is offered as a used controller, which is a cost-effective solution while maintaining the manufacturer's original specifications. Such components are frequently chosen for repairs of older models, where combining proper operation with a reasonable service budget is key.

Using used electronics in BMW

In the case of modules such as the Bluetooth controller, using tested used electronics is often an optimal compromise between price and functionality. An original controller from dismantling allows for restoring full phone connection support and mobile device integration without the need to invest in expensive replacements or modifying the installation. If you want to better understand when choosing a used module is justified and what to look for when selecting controllers, it is worth reading our guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

Expanding the controller system in BMW

If you are planning a comprehensive repair or upgrade of the onboard electronics in your BMW and need other elements from the same group, such as comfort modules, light controllers, or multimedia units, check out the available parts in the BMW electronic control modules and controllers category. For owners of older models, where the availability of new components is sometimes limited, our practical article on parts from dismantling may also be helpful: No parts at the dealership? How to handle repairs of older models using parts from dismantling.