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

BMW E81 E87 E90 E91 E92 Active Steering Control Unit Module is an original electronic control unit for the active steering system designed for 1 and 3 Series models. As a component from the Electronic control units and controllers group, it is responsible for the precise management of the active steering gear, improving stability, maneuverability, and driving comfort of your BMW. This used control unit is a solution that allows for a technically correct repair of the factory system without the need for a costly replacement of the entire assembly.

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 unit

The Active Steering control unit in BMW E81, E87, E90, E91, and E92 series is responsible for dynamically adjusting the steering ratio based on driving speed and road conditions. In practice, this means easier maneuvering at low speeds and more stable, predictable reactions during highway driving. The controller analyzes signals from vehicle sensors and, based on them, manages the operation of the active mechanism, ensuring consistent performance with the vehicle's other electronic systems.

Benefits of using an original BMW module

Using an original BMW module from the Electronic control units and controllers group ensures full compatibility with the factory electrical installation and vehicle software. This is particularly important for advanced systems such as Active Steering, which work in conjunction with stability control, safety systems, and body control modules.

• factory fitment for the electrical architecture of BMW 1 and 3 Series E8x/E9x generations,
• consistent cooperation with other controllers in the vehicle,
• preservation of original handling parameters and steering characteristics,
• compatibility with diagnostics and coding using standard BMW service tools.

Application in service practice

The Active Steering control unit is used both for repairs following steering system failures and for replacing damaged controllers due to communication errors in the vehicle's bus. The used component allows for an economical yet technically correct restoration of system efficiency while maintaining the original operating characteristics. Thanks to the OEM part number and available interchangeable numbers, it is easy to verify the module's compatibility with a specific car configuration.

Condition and installation of the module

The controller is offered in used condition, which in practice means a component sourced from dismantling, intended for reinstallation after proper verification and potential coding in the vehicle. During installation, it is recommended to:

• check the part number compatibility with the car's configuration,
• perform diagnostics before and after installation,
• carry out the coding/adaptation procedure in accordance with BMW guidelines. This approach minimizes the risk of communication errors between controllers and allows for the restoration of full Active Steering system functionality.

Expanding knowledge about BMW electronic modules

If you want to better understand how to maintain the controllers in your BMW, including modules responsible for comfort and safety, it is worth checking out our online service guide. Practical tips regarding diagnostics, repairs, and the use of dismantled parts can be found in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models, which discusses, among other things, the operation of controllers and their role in daily use. If you are planning a comprehensive repair or upgrade of the steering and control area in your BMW and need other components from the same group, such as power steering controllers, comfort modules, or other electronic management units, check out the available parts in the BMW electronic control units and controllers category.