BMW E81 E87 E90 E91 LCI Power Steering Rack Box Electric Drive Motor Unit

Description

BMW E81 E87 E90 E91 LCI Power Steering Rack Box Electric Drive Motor Unit is an original steering system component designed for facelifted BMW 1 and 3 Series models. Thanks to its integrated electric power steering drive, it ensures precise handling, stable operation, and consistency with the factory driving characteristics. This solution allows you to maintain factory handling parameters and driving comfort after repairing or replacing a damaged steering rack.

Specifications and technical data

• SKU: 6792942-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6792942
• Substitutable numbers: 32106793458, 6793458, 32106788746, 32106792946, 6788746, 6792946, 32106872479, 6872479, 6792942
• Category: Gearboxes, Racks & Pinions

Purpose and function in the steering system

The described steering rack belongs to the Steering racks and housings category and is responsible for transferring movement from the steering wheel to the front wheels while utilizing electric power assistance. The integrated electric motor is responsible for generating steering assistance force, which translates into lighter steering operation during maneuvering and stable, predictable reactions at higher speeds.

In BMW vehicles with electric power steering, a correctly selected steering rack is crucial for:

• maintaining proper geometry and linearity of the steering system response,
• correct cooperation with safety systems (e.g., electronic stability control),
• preserving the comfort and road feel characteristic of BMW.

Original origin and compatibility

The product comes from the BMW OE line, which means it is a part compliant with the manufacturer’s factory standards. As a result, the steering rack maintains full compatibility with factory mounts, the steering column, and the electrical harness responsible for controlling the steering motor.

The component has a dedicated OEM part number and assigned interchangeable numbers, which facilitates clear identification and selection for a specific equipment version. In practice, this means that when selected correctly according to the part number and vehicle model, the steering rack fits without the need for modifications, maintaining a plug-and-play installation character.

Performance characteristics and advantages of use

Choosing an original BMW E81, E87, E90, and E91 LCI Power Steering Rack Box Electric Drive Motor Unit allows you to restore the vehicle’s factory driving properties. Key benefits include:

• Consistent steering system operation – maintaining a predictable response to steering wheel movement and stable return to the neutral position.
• Proper cooperation with vehicle electronics – the steering control unit receives correct signals from torque and steering angle sensors, which limits the risk of errors and warning messages.
• Reduction of play and unwanted vibrations in the system – with proper installation and vehicle geometry alignment.
• Possibility of economical repair – using an original OEM component allows for lower service costs while maintaining high manufacturing quality.

Condition, selection, and installation of the steering rack

The steering rack is offered as a used original component, which in practice means maintaining the factory design and operating parameters while offering an attractive price compared to new parts. Before installation, it is recommended to verify the compatibility of the OEM part number and interchangeable numbers with the vehicle documentation or the existing component to ensure full compatibility.

During installation, it is worth paying attention to:

• proper tightening of the mounting points to the subframe,
• correct connection of the electric steering motor connector,
• performing adaptation or calibration of the steering system, if required by BMW service procedures.

Expansion of the BMW steering system

If you are planning a comprehensive repair or upgrade of the steering area in your BMW and need other components from the same group, such as tie rods, ends, or additional housings, check the available parts in the BMW steering racks and housings category.

For drivers who are simultaneously servicing the drivetrain and want to better understand the relationship between the operation of the steering rack and the drivetrain, a guide on diagnostics and selection of clutch components and dual-mass flywheels may be helpful – you can find it in the article Clutch and dual-mass flywheel – diagnostics and selection of parts for the drivetrain.