BMW F01 LCI F07 F10 F11 F12 Steering Rack Motor Steering Gear Actuator 6870797

BMW F01 LCI F07 F10 F11 F12 Steering Rack Motor Steering Gear Actuator is an original BMW steering system component, designed to work with the electric power steering in selected F-series models. This specialized module, classified under Steering racks and housings, is responsible for precise control of the steering assist torque, which translates into stable handling and predictable steering system response.

Specifications and technical data

• SKU: 6870797-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6870797
• Substitutable numbers: 6870797, 32106870797, 6798403, 32106798403, 6856431, 32106856431, 6865440, 32106865440, 6795239, 32106795239, 6868352, 32106868352, 6798159, 32106798159, 6860179, 32106860179, 0 273 010 173, 7806 079 541, 7806 177 451
• Category: Gearboxes, Racks & Pinions

Application and function in the steering system

The steering rack motor integrated with the steering gear acts as a steering assist actuator. Based on signals from the vehicle's sensors and control units, it generates the appropriate torque, which relieves the driver during maneuvering and ensures a more compact, stable handling characteristic at higher speeds.

In BMW F-series vehicles, the use of electric power steering allows for:

• precise adjustment of the steering assist force depending on speed and driving mode,
• integration with safety systems (e.g., lane assist, electronic stability control systems),
• reduction of mechanical loads compared to classic hydraulic systems.

Construction and technical characteristics

The presented BMW steering rack motor is designed as a component that works directly with the steering gear housing, which minimizes mechanical losses and improves the system's response speed. The module's design includes:

• mounting directly on the steering rack,
• electronically controlled electric drive,
• integrated connections with the vehicle's electrical system.

As a result, the steering system maintains consistent operation with factory traction and stability control systems, and the response to steering movements remains predictable and repeatable.

Benefits of using an original BMW actuator

Using an original steering rack motor in a BMW F-series vehicle allows for maintaining the factory vehicle handling parameters. Key advantages include:

• compatibility with the factory electrical architecture – the module works with the vehicle's original control units and software,
• appropriate steering assist characteristics – matched to the weight, load distribution, and suspension geometry of specific BMW models,
• stable steering system operation during emergency maneuvers and while driving at higher speeds.

For the user, this means maintaining predictable vehicle behavior, consistent with the manufacturer's specifications, as well as reducing the risk of communication errors between control modules.

Condition, selection, and vehicle integration

The item comes from the group of original BMW parts and is offered as a used component, which provides a cost-effective solution while maintaining the correct technical specifications. The selection of the appropriate actuator for a specific vehicle should take into account the manufacturer's markings and the list of interchangeable part numbers – this allows for verifying compatibility with a given steering rack version and vehicle model year.

During installation, it is recommended to:

• check the tightness and mechanical condition of the entire steering rack,
• verify the correctness of electrical and ground connections,
• perform adaptation / calibration of the steering system using an appropriate diagnostic tester.

Technical support and additional information

If you are planning a comprehensive repair or upgrade of the steering system area in your BMW and need other elements from the same group, such as steering gear housings, mounting elements, or additional components working with the steering assist motor, check the available parts in the BMW Steering racks and housings category.

For BMW owners interested in a broader context of operation and typical engine failures, a practical guide regarding problematic engines in the E90 series may be helpful – you can find it in the article Troublesome BMW E90 engines: check what can ruin your budget!.