BMW E87 E90 E91 Active Steering Power Steering Rack Boxes Electric 6770535

Visual condition of the part

The product shows signs of use visible in the photos.

BMW E87 E90 E91 Active Steering Power Steering Rack Boxes Electric is an electric steering rack with active steering, designed for selected BMW 1 and 3 Series models. The item belongs to the Steering Racks and Housings category and is a key component of the steering system, responsible for precisely transferring steering wheel movement to the wheels. This used OEM BMW component ensures factory-fitment and maintains the handling characteristics consistent with the manufacturer's specifications.

Specifications and technical data

• SKU: rhd-6770535-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6770535
• Substitutable numbers: 32106777470, 6777470, 32106770585, 6770585, 32106771669, 6771669, 32106774844, 6774844, 32106769335, 6769335, 6770535
• Category: Gearboxes, Racks & Pinions

Application and function in the steering system

The steering rack with active electric power steering is responsible for translating steering wheel movement to the steering knuckles and for dynamically changing the steering ratio depending on the vehicle's speed. In practice, this means:

• lighter steering effort during maneuvering and parking,
• more direct steering response at higher speeds,
• more stable vehicle handling in corners and during sudden changes of direction.

Thanks to its integration with the active steering system, the rack communicates with the vehicle's electronics, allowing for precise adjustment of handling characteristics to road conditions and the driver's driving style.

Compatibility and BMW fitment

The offered steering rack was designed as an OEM part for selected versions of the BMW 1 Series E87 and 3 Series E90/E91 equipped with active steering. This means:

• preservation of the original steering geometry,
• proper cooperation with factory control units and electrical wiring,
• fitment with factory mounts without the need for modifications.

Before purchasing, it is recommended to compare the steering rack part numbers with the currently installed unit and verify compatibility with the specific engine and equipment version of the vehicle to ensure trouble-free installation and proper operation of the active steering system.

Characteristics of the used component

The steering rack comes from a used vehicle, which in practice means it is an original BMW component removed from a donor car. Such parts are frequently chosen for steering system repairs because:

• they maintain the factory design and operating parameters,
• they allow for cost savings compared to new parts,
• they enable the maintenance of system consistency with other vehicle components.

Before installation, a standard mechanical and electrical condition check by an experienced service center is recommended, with particular attention to rack play, seals, and the proper operation of the electric drive and position sensors.

Benefits of using an original active steering rack

Using an original steering rack with active steering in a BMW E87/E90/E91 allows you to maintain the driving characteristics intended by the manufacturer. The most important advantages include:

• precise vehicle handling thanks to the correct ratio and integration with the car's electronics,
• consistency with safety systems, such as electronic stability control or traction assistants,
• factory fitment to the steering column, knuckles, and other suspension components.

A properly selected active steering rack helps reduce tire wear, improves driving comfort, and increases the predictability of the car's behavior in emergency situations.

Related BMW steering system components

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

When working on the drivetrain and steering system, it is also worth paying attention to the selection of other components, such as differentials or drivetrain parts – you can find practical tips on buying used components in our guide Second-hand differential – what you need to know about used differentials, sensors, and drivetrain systems.