BMW E81 E87 E90 E91 Electric Power Steering Rack Box Pinion Gear 6872479

The BMW 1 3 Series E81 E87 LCI E90 E91 Electric Steering Rack is an original BMW steering system component designed for 1 and 3 Series models with electric power steering. Its factory-built design ensures precise vehicle handling and seamless integration with the onboard electronics, which is crucial for repairing modern steering systems.

Specifications and technical data

• SKU: RHD-6872479-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6872479
• Substitutable numbers: 32106793458, 6793458, 32106788746, 32106792946, 6788746, 6792946, 32106872479, 6872479, 6794006, 32106785290, 6785290, 32106783128, 6783128, 32106784746, 6784746, 32106782204, 6782204, 32106779076, 6779076, 32106862854, 6862854, 32104087308, 4087308, 32102299543, 2299543
• Category: Gearboxes, Racks & Pinions

Application and Compatibility

The electric steering rack presented here is intended for BMW 1 Series E81 / E87 LCI and BMW 3 Series E90 / E91 vehicles equipped with an electric power steering system. This part belongs to the Steering Racks and Housings group, meaning it is responsible for transferring steering wheel movement to the wheels and cooperating with stability control and power steering systems. Being an original BMW OE part guarantees correct mounting points, appropriate geometry, and compliance with factory operating parameters, minimizing the risk of issues with wheel alignment, play, or communication with control modules.

Construction and Function of the Electric Steering Rack

The electric steering rack combines a mechanical gear system with an electric motor and control electronics within a single housing. In practice, this means:

• precise translation of steering wheel movement to the front wheels,
• cooperation with safety systems (e.g., lane keeping assist),
• adjustment of power steering assist force based on vehicle speed and driving conditions. Thanks to this design, the steering system responds smoothly, and the driver receives clear feedback from the road, resulting in stable and predictable handling both in the city and at higher speeds.

Benefits of Using an Original BMW Steering Rack

Choosing an original BMW steering rack offers a number of practical advantages:

• factory fit for the steering column, suspension, and subframe mounts,
• correct cooperation with the factory power steering control software,
• maintenance of the proper steering force characteristics, in line with manufacturer specifications,
• reduced risk of errors in control units and warning lights on the dashboard. A component from the Steering Racks and Housings group has a crucial impact on driving safety, making the use of an original solution particularly important for post-collision repairs, steering system overhauls, or replacement of a worn-out steering rack.

Part Condition, Origin, and Identification

The offered BMW steering rack is a used part, allowing for economical repair while maintaining the original construction. The part comes from the BMW OE line, ensuring full compliance with factory quality and manufacturing standards. The product features a dedicated OEM part number and a set of interchangeable numbers, facilitating unambiguous identification and matching to a specific equipment version. The technical description also includes data such as SKU, brand, and condition information, allowing for quick verification of compatibility with your vehicle.

Technical Support and Additional Information

To better understand the operation of electric power steering and the symptoms of worn steering system components, it is recommended to read the guide: Steering System and Power Steering – How It Works and What Fails?. The article discusses common fault symptoms, diagnostic methods, and practical tips for selecting used parts. If you are planning a comprehensive repair or upgrade of the steering system area in your BMW and need other components from the same group, such as different steering racks, housings, or parts cooperating with the steering column, check the available parts in the BMW Steering Racks and Housings category.