BMW 1 3 Series E87 E90 Hands-free Electronics Bluetooth Module MULF2 9178862

BMW 1 3 Series E87 E90 Hands-free Electronics Bluetooth Module MULF2 is an original electronic control module designed for factory communication systems in BMW 1 Series E87 and 3 Series E90 vehicles. This component from the Electronic control modules and controllers category is responsible for handling Bluetooth functions, ensuring seamless phone integration with the vehicle's system. Thanks to its OEM design, the module works with the vehicle's wiring in accordance with the manufacturer's standards.

Specifications and technical data

• SKU: 9178862
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9178862
• Substitutable numbers: 84109226711, 9226711, 84109215184841091287228410916334884109195246, 9215184912872291633489195246, 84109178862841091325398410920082184109221029, 9178862913253992008219221029, 84109204545841091475168410914965684109181378, 920454591475169149656918, 84109215184, 9215184, 84109204545, 9204545, 84109200821, 9200821, 84109195246, 9195246, 84109181378, 9181378, 84109178862, 9178862, 84109162982, 9162982, 84109147516, 9147516, 84109163348, 9163348, 84109149656, 9149656, 84109141048, 9141048, 84109132539, 9132539, 84109128722, 9128722, 84
• Part type: Central Timing Module
• Category: ECUs & Computer Modules

Purpose and function of the MULF2 module

The MULF2 module acts as the central controller responsible for Bluetooth communication in selected BMW models. It integrates with the factory audio system and the vehicle's electrical installation, allowing for phone call management via the multifunction steering wheel or the head unit. This provides the driver with convenience and ensures consistent operation of all onboard functions. As an OEM BMW component, the controller is designed for the specific electrical architectures of the E87 and E90 series, which translates into stable performance and correct communication with other control units in the vehicle (e.g., the comfort module or multimedia system).

Compatibility, interchangeable numbers, and OEM selection

The presented module belongs to the Electronic control modules and controllers group, which often features many hardware and software versions. This unit has a dedicated OEM part number and an extensive list of interchangeable numbers, making it easier to match to a specific vehicle configuration. When selecting, it is recommended to verify compatibility using the OEM number, reference numbers, and the vehicle's VIN. If you want to learn more about selecting used controllers, the differences between hardware and software versions, and safe installation principles, check out our guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. The article explains step-by-step how to properly check compatibility and what to pay attention to during installation.

Characteristics and advantages of using an original BMW module

Using an original MULF2 module in a BMW E87/E90 ensures:

• consistency with the vehicle's factory electronic architecture,
• proper cooperation with other controllers in the CAN/LIN network,
• preservation of factory Bluetooth functions without the need for wiring modifications,
• aesthetic integration with the existing audio system and interior equipment. With this solution, the driver receives a functional, factory-compliant communication system without the compromises typical of universal hands-free kits. The original control module minimizes the risk of communication errors, interference, and coding issues.

Condition, origin, and practical application

The offered module is a used component sourced from a dismantled BMW vehicle. Such components are a popular choice for comfort and multimedia system repairs when the factory controller has failed or there are issues with Bluetooth communication. In many cases, installation involves replacing the module and potentially performing software adaptation to the specific car. Before purchasing, it is worth comparing the markings with the currently installed controller and consulting a mechanic or automotive electrician to ensure full hardware and software compatibility. This approach reduces diagnostic time and speeds up the restoration of full system functionality.

Expanding the BMW control system – related modules

If you are planning a comprehensive repair or upgrade of your BMW's onboard electronics and need other components from the same group, such as comfort controllers, multimedia modules, or connectivity management units, check out the available parts in the BMW Electronic control modules and controllers category. Thanks to the wide availability of original controllers, you can build a coherent, functional electronic system while maintaining manufacturer standards and reducing costs compared to new components.