BMW F10 F20 F30 Tow Bar Trailer Towing Control Module Unit AHM 4 6855562

BMW F10 F20 F30 Tow Hitch Control Module 6856747 is an original electronic control unit designed for the operation of the tow hitch installation in selected BMW F-series models. This specialized module from the Electronic Control Modules and Controllers group ensures proper communication with the vehicle's electrical system, integrating the tow hitch functions with safety and comfort systems.

Specifications and technical data

• SKU: 6855562
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6855562
• Substitutable numbers: 6855562, 71606855562, 6856747, 71606856747, 9216475, 61359216475, 6853417, 71606853417, 6850496, 71606850496, 9198708, 61359198708, 9192672, 61359192672, 9229899, 61359229899
• Category: ECUs & Computer Modules

Purpose and Function of the BMW Tow Hitch Controller

The presented controller is a component of the system responsible for managing the operation of the tow hitch socket in BMW F-series vehicles, such as F10, F20, or F30. The module monitors the power supply and control of the trailer lighting, cooperates with the vehicle's installation, and enables the correct functioning of towing-related features, such as light control or instrument cluster messages.

As an original BMW part, the module has been designed to work within the electrical architecture of these models, taking into account specific requirements for data bus communication and integration with other vehicle controllers.

Benefits of Using an Original BMW Module

Using an original tow hitch controller in BMW F-series vehicles helps maintain the consistency of the electrical installation and reduces the risk of communication errors between modules. In practice, this means:

• correct operation of trailer lighting and turn signal indication,
• proper cooperation with the vehicle's onboard systems,
• preservation of factory towing-related functions,
• better compatibility with BMW diagnostic software.

An additional advantage is the ability to select parts by OEM number and interchangeable numbers, which facilitates finding a module compatible with the specific vehicle configuration.

Characteristics and Integration with Vehicle Installation

The module belongs to the Electronic Control Modules and Controllers group, meaning it communicates with other control units in the vehicle via the communication bus. Proper selection based on equipment version and software is crucial for the seamless operation of the entire system.

During installation, it is important to:

• match the module to the specific BMW F-series model and year,
• verify compatibility using the OEM part number and reference numbers,
• perform any necessary adaptation or coding according to BMW procedures.

This ensures that the controller is correctly recognized by other units in the vehicle, and the tow hitch functions are fully integrated with the electrical system.

Condition, Origin, and Practical Application

The offered module is a used part, sourced from a dismantled BMW vehicle. Such components are often chosen as an economical alternative to new parts, especially for complex electronic systems. A used controller allows for restoring the functionality of the tow hitch installation or supplementing it in cars that were factory-prepared for tow hitch installation but lacked complete equipment.

Before purchasing, it is advisable to compare the module's markings with the vehicle's data and consult with a mechanic or automotive electrician to ensure full hardware and software compatibility.

To better understand how to safely select and install used controllers and other vehicle electronics, we encourage you to read our guide: Used Automotive Electronics – How to Make Informed Choices for Modules and Sensors by OEM Number and VIN.

If you are looking for other components from the controllers and electronics group for your BMW, also check our offer in the Electronic Control Modules and Controllers section, where you will find a wide selection of compatible components for various models.