BMW F45 X1 F48 X2 F39 Electric Power Steering Gear Rack Motor Pinion 6899957

BMW F45 X1 F48 X2 F39 Electric Power Steering Gear Rack Motor Pinion is an original BMW steering system component, including the rack, motor, and pinion assembly. Thanks to its precise design, it ensures stable vehicle handling, proper transmission of torque from the steering wheel to the wheels, and correct integration with the electric power steering system.

Specifications and technical data

• SKU: rhd-5A39027
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 5A39027
• Substitutable numbers: 5A39027, 32105A39027, 6899957, 32106899957
• Category: Gearboxes, Racks & Pinions

Application and compatibility

The offered BMW steering gear is designed for F45 series, X1 F48, and X2 F39 models equipped with electric power steering. The integrated motor and pinion mechanism form a complete assembly that works with the vehicle's factory electronics, safety systems, and driver assistance systems, in accordance with the solutions used by BMW in this generation.

By using an original design from the Steering gears and housings group, the correct gear ratios, geometry, and steering characteristics are maintained, which translates into predictable vehicle reactions and consistent driving feel.

Construction and function of the motor-rack assembly

The steering gear combines a rack, an electric motor, and a pinion mechanism in one housing, responsible for converting the rotational movement of the steering column into the linear movement of the tie rods. This configuration allows for:

• precise control of steering assistance force depending on speed and driving conditions,
• smooth transmission of steering movement to the wheels without excessive play,
• maintaining appropriate system rigidity during emergency maneuvers.

The steering gear housing has been designed to work with factory mounts in the BMW body, which facilitates installation and maintains the correct position of the rack relative to the suspension.

Benefits of using an original BMW steering gear

Using an original steering gear in a BMW F45, X1 F48, or X2 F39 allows you to maintain factory vehicle handling parameters. Key advantages include:

• consistent steering assistance characteristics – compliant with manufacturer settings, without unexpected changes in steering force,
• proper cooperation with onboard systems, such as electronic stability control or driver assistants,
• appropriate dimensional and mounting fit to factory mounting points in the body.

A component from this group is particularly important for post-collision repairs, steering system refurbishment, or restoring full efficiency to a car operated in demanding conditions.

Condition, origin, and quality control

The steering gear comes from the BMW range and is classified as a used part. This means it is an original part, sourced from dismantling, which can be a cost-effective alternative to new components while maintaining structural compatibility with the factory steering system. Such components are frequently chosen both by workshops specializing in the BMW brand and by users independently collecting parts for repairs.

Thanks to the preservation of the original manufacturer's specification, it is possible to maintain the correct steering geometry and avoid fitment issues that may occur with aftermarket parts of uncertain origin.

Support with selection and additional information

In case of doubt regarding the fitment of the steering gear to a specific engine or equipment version, it is worth verifying compatibility with part numbers and vehicle configuration using manufacturer data or support from a specialized service. When replacing, it is also recommended to check the condition of the tie rods, ends, and suspension components to fully utilize the potential of the newly installed subassembly.

If you are planning a comprehensive repair or upgrade of the steering area in your BMW and need other elements from the same group, such as other steering gears, housings, or related mounting components, check the available parts in the BMW steering gears and housings category.

For owners of older BMW models who want to consciously use used components for larger renovation or modernization projects, an article describing practical scenarios for refreshing cars from the turn of 1998–2012 may be helpful – more information can be found in the material The second life of a youngtimer – how used car parts rejuvenate cars from the 1998–2012 model years.