BMW E81 E87 E90 E91 E92 Active Steering Control Unit Module 6770918

BMW E81 E87 E90 E91 E92 Active Steering Control Unit Module is a specialized component from the Electronic control modules and controllers group, responsible for the precise management of the active steering system in selected BMW 1 and 3 Series models. The module provides advanced steering ratio control, supporting vehicle stability and driving comfort in various road conditions. This solution is intended for users who expect proven, factory-spec electronics with high reliability.

Specifications and technical data

• SKU: 6771402
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6771402
• Substitutable numbers: 6771402, 32436771402, 6782283, 32436782283, 6773990, 32436773990, 6770918, 32436770918, 6772651, 32436772651, 6778087, 32436778087, 6770739, 32436770739, 6770471, 32436770471, 6779960, 32436779960, 6770469, 32436770469, 6776656, 32436776656, 1277022052, 1 277 022 052
• Category: ECUs & Computer Modules

Purpose and function of the active steering control module

The presented controller is a component of the active steering system, which dynamically adjusts wheel response to steering input. As a result, the vehicle remains stable at higher speeds, while maneuvering at low speeds becomes lighter and more predictable. The module works in conjunction with other vehicle electronic systems, such as electronic stability control, to ensure consistent and safe operation of the entire system.

Benefits of using an original BMW module

Using an original module from the Electronic control modules and controllers group allows you to maintain the factory driving characteristics of your BMW. The controller is designed for the specific electrical architecture of the vehicle, which translates into:

• precise fitment to the car's electrical installation and communication bus,
• consistent operation with factory software and other controllers,
• stable operation of the active steering system across the full speed range.

For the user, this means maintaining the characteristic BMW confident handling and predictable vehicle response to steering movements.

Technical characteristics and vehicle integration

The active steering module is an electronic component that communicates with other controllers in the vehicle via digital data buses. It features dedicated connectors, allowing for direct integration into the factory wiring harness. Consequently, installation in a vehicle that uses this solution from the factory can be carried out in an orderly manner, in accordance with service documentation.

The presence of an OEM part number and available interchangeable numbers allows for precise identification of the controller in terms of compatibility with a specific vehicle configuration. This is important both when selecting parts and during subsequent diagnostics or programming at a service center.

Product condition and practical application

The offered module is a used component, which in the case of automotive electronics often represents a reasonable compromise between cost and functionality. Such controllers, sourced from dismantling, are frequently chosen for steering system repairs when maintaining the original vehicle specification is a priority. In practice, the module can be used both as a replacement part in the event of an existing controller failure and when replacing steering system components that require electronic matching.

Selection and operation of electronic control modules

When choosing a used active steering controller, it is worth paying attention to compatibility with the OEM part number and the list of interchangeable numbers, as well as requirements regarding potential programming or adaptation in the vehicle. It is also good practice to perform diagnostics after installation to confirm proper communication between the module and other systems.

If you would like to learn more about the use of used electronics in cars, how to select controllers, and practical operating principles, check out the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, where you will find practical tips and examples.

Support for BMW steering system repair

The active steering system is one of the key elements affecting driving safety and comfort, which is why it is worth using components designed specifically for the brand when servicing it. If you are interested in a broader context of how the steering system works, symptoms of malfunctions, and examples of applied solutions, the guide Steering system and power steering – how it works and what goes wrong?, which discusses this group of components in an accessible way, will be helpful.

If you are planning a comprehensive repair or upgrade of the control electronics area in your BMW and need other elements from the same group, such as engine controllers, comfort modules, or safety management systems, check out the available parts in the BMW electronic control modules and controllers category.