BMW F01 F02 F07 GT Hydro Power Steering Rack Hydraulic Gear Pinion 6781623

BMW F01 F02 F07 GT Hydro Power Steering Rack Hydraulic Gear Pinion is an original steering system component designed for 7 Series F01/F02 and 5 GT F07 models equipped with hydraulic power steering. This used steering rack, maintaining its OEM design, ensures proper gear ratio, precise handling, and correct compatibility with the factory power steering pump and steering column. It is an ideal solution for users seeking a technically matched component without the need for an expensive purchase of a new part.

Specifications and technical data

• SKU: RHD-6781623-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6781623
• Substitutable numbers: 32106793198, 32106785478, 6785478, 6793196, 32106777537, 6777537, 32106780945, 6780945, 32106775426, 6775426, 32106773772, 6773772, 32106770314, 6770314, 32106769302, 6769302, 32106768064, 6768064, 32106766665, 6766665
• Part type: Steering Gear
• Category: Gearboxes, Racks & Pinions

Technical characteristics and intended use

The hydraulic rack & pinion steering gear used in the BMW F01, F02, and F07 GT is responsible for transferring movement from the steering column to the steering knuckles using pressure within the power steering system. The rack and pinion design is optimized for the weight and load distribution of these models, resulting in stable handling at higher speeds and predictable steering response.

The component is factory-adapted to work with the suspension system and front axle geometry in F01/F02 sedans and the F07 GT body style, ensuring that the handling characteristics remain consistent with the manufacturer's specifications.

Benefits of using an original hydraulic steering rack

Using an original BMW steering rack allows you to maintain the factory performance parameters of the steering system without the compromises typical of aftermarket replacements. Properly selected gear ratios, power steering characteristics, and mounting geometry minimize the risk of incorrect wheel alignment, excessive play, or uneven tire wear.

Key advantages include:

• maintaining predictable vehicle response to steering input,
• proper compatibility with the factory hydraulic power steering system,
• perfect fit for the original mounting points in the F01, F02, and F07 GT chassis,
• reduced risk of geometry and alignment issues after installation.

For users who value comfort and driving stability in premium vehicles such as the BMW 7 Series and 5 GT, maintaining the original steering system characteristics has a direct impact on safety and driving confidence.

Condition, origin, and installation aspects

The offered steering rack is sourced from dismantling and is sold as a used steering system component. Such components are frequently chosen for post-accident repairs, mechanical damage (e.g., after hitting an obstacle), or due to excessive wear of the rack and seals in the currently installed unit.

During installation, it is recommended to:

• use new mounting hardware and hoses if specified by the manufacturer,
• thoroughly bleed the power steering system after installation,
• check and adjust front wheel geometry after completing the work.

This approach allows you to fully utilize the potential of the used steering rack and minimize the risk of future leaks or improper power steering operation.

Practical application and part selection

The hydraulic steering rack for BMW F01, F02, and F07 GT is particularly recommended in situations where the current unit shows leaks, excessive play in the rack, or uneven operation during turns. Choosing an original design from the same model family facilitates matching with the existing system, and the presence of interchangeable part numbers allows for precise verification of compatibility with specific engine versions and model years.

This helps avoid problems with mounting mismatches, differences in rack length, or varying operating characteristics that may occur when choosing random aftermarket replacements. If in doubt, it is worth comparing the markings with the currently installed steering rack or consulting with a mechanic specializing in the BMW brand.

Expanding steering system upgrades

If you are planning a comprehensive repair or upgrade of the steering system in your BMW and need other elements from the same group, such as columns, housings, or additional power steering components, check out the available parts in the BMW Steering Racks and Housings category.

For more advanced drivetrain and handling modifications, knowledge about selecting gear ratios in drive systems may also be helpful – you can find practical tips in the article Dismantled drive axles and differentials – how to choose gear ratios for your driving style, which discusses the relationships between gear ratios, driving character, and component compatibility.