Bluetooth Module BMW E81 E87 E90 E91 Hands Free High MULF2 Harman Becker 9183373

Bluetooth Module BMW E81 E87 E90 E91 Hands Free High MULF2 Harman Becker is an original BMW multimedia system component, responsible for handling Bluetooth connectivity in selected 1 and 3 series models. This module allows for convenient phone integration with the factory audio system, ensuring comfortable operation of calls and hands-free features. Thanks to its factory design, the MULF2 module works with the vehicle's installation without the need for wiring modifications.

Specifications and technical data

• SKU: 9183373
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9183373
• Substitutable numbers: 841092246748410918762584109147519, 841091788988410914984384109207360, 922467491876259147519917889891498439207360, 8410916322984109181391, 91632299181391, 8410922319084109200822, 92231909200822, 8410917242084109229740, 9172420, 9229740
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and function of the MULF2 module

The MULF2 Bluetooth module is a component of the factory communication system in BMW vehicles, responsible for managing the Bluetooth interface between the vehicle and external devices. In practice, this means the ability to wirelessly connect a phone to the car, use the hands-free system, and integrate with the factory radio or iDrive system, depending on the specific vehicle configuration.

By using an original module, full compatibility with the BMW electrical architecture is maintained, which minimizes the risk of communication errors on the bus and ensures stable operation of the multimedia system.

Advantages of using an original BMW module

Using a factory Bluetooth module instead of non-factory solutions offers a number of technical and practical benefits, including:

• consistent operation with the vehicle's factory software,
• proper cooperation with multifunction steering wheel buttons and the display,
• preservation of the original functionality of the audio and communication system,
• no need to interfere with the installation through additional adapters or connectors.

For the user, this means more predictable system performance, easier diagnostics, and the ability to service the vehicle according to BMW standards.

Integration with the vehicle installation

The MULF2 module is designed as an OEM system component, which translates into a perfect fit for factory mounts, connectors, and wiring harnesses. In most configurations, installation involves connecting the module to the existing wiring and coding it into the vehicle according to the specific car's equipment.

When replacing a module in a car already equipped with one, the work usually comes down to removing the old unit, installing the new one in the same location, and performing diagnostic and coding procedures to ensure the vehicle's controllers correctly recognize the device.

Condition and origin

The offered module comes from a dismantled BMW vehicle, which means it is an original part previously used in a car. Such components are a popular choice as a service solution because they allow for maintaining the factory equipment specification at reasonable costs for repair or multimedia system upgrades.

Related components and system expansion

When planning an upgrade to the connectivity system in a BMW, it is worth considering other components such as wiring harnesses, a microphone, a control panel, or the audio system head unit to ensure the entire system works cohesively. If you are planning a comprehensive repair or upgrade of the multimedia zone in your BMW and need other elements from the same group, such as control modules, audio units, or interface components, check the available parts in the Other BMW category.

More about sports systems and components

If you are interested in how premium manufacturers differentiate equipment and components between standard and sports versions, including solutions in the field of drivetrain, brakes, and chassis, it is worth reading an article comparing RS models to base versions: Audi RS vs other models – what is hidden under the hood and chassis?. This allows for a better understanding of the philosophy behind designing components in the high-performance vehicle segment.