BMW Z4 Series E85 2.5i M54 Roadster Rear Right O/S Suspension Leg Brake Disc

BMW Z4 Series E85 2.5i M54 Roadster Rear Right O/S Suspension Leg Brake Disc is an original suspension component designed for the rear right side of the vehicle, ensuring proper wheel guidance and power transmission. Thanks to the factory design for BMW, you maintain suspension geometry, vehicle stability, and correct compatibility with other components. It is a practical solution for post-collision repairs, replacing worn-out parts, or comprehensive rear suspension restoration.

Specifications and technical data

• SKU: 6774776-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6774776
• Substitutable numbers: 33326774776, 6774776, 34216758128, 6758128, 33211229708, 1229708, 34216794306, 6794306, 33326770820, 6770820, 33326757910, 6757910, 34211165032, 1165032, 34216766225, 6766225, 34216752545, 6752545, 33211229496, 1229496
• Location on the vehicle: Rear, Right
• Category: Suspension Component Replacement Kits

Purpose and function in the suspension system

The presented steering knuckle and axle shaft set for the rear right side is responsible for stable wheel guidance and efficient torque transfer to the road surface. This component works in conjunction with the suspension, brakes, and drivetrain, which is why its correct selection has a direct impact on driving safety, handling precision, and vehicle comfort.

The vehicle placement defined as rear – right side facilitates clear identification of the part during selection and installation, minimizing the risk of errors when ordering components for a specific axle and side of the vehicle.

Compatibility and part identification

The steering knuckle and axle shaft have been designed as a component dedicated to the suspension system of the BMW Z4 E85 model with the 2.5i M54 engine, which allows for maintaining factory mounting points and correct cooperation with standard body and drivetrain elements. The OEM designation facilitates identification in service catalogs and parts selection systems, and also allows for comparison with other references within the same product group.

The presence of assigned interchangeable numbers in the technical specification means that the component may correspond to several references used in different production periods or equipment variants, which increases flexibility in selection during repairs and upgrades.

Application in Suspension Replacement Kits

The product belongs to the Suspension Replacement Kits category, making it a suitable choice for comprehensive rear axle service – especially when both structural and drivetrain elements have been damaged. Replacing the complete steering knuckle and axle shaft assembly allows for reduced service time, simplified installation, and a lower risk of fitment issues with individual sub-assemblies.

This approach is particularly beneficial for post-accident repairs, suspension regeneration after years of operation, or when preparing a car for more demanding driving, where stiffness and consistent suspension performance are key.

Characteristics of the used component

The part is offered as a used OEM component, which allows for combining reasonable purchase costs with the preservation of the original design intended by the vehicle manufacturer. In practice, this means factory mounting points, correct geometry, and compatibility with standard solutions used in the BMW Z4 E85.

When choosing a used suspension element, it is worth paying attention to the condition of working surfaces, mounting sockets, and any signs of previous repairs – these are the aspects that determine durability and trouble-free operation after installation in the car.

Support for BMW suspension system expansion

If you are planning a comprehensive repair or upgrade of the rear suspension area in your BMW and need other elements from the same group, such as control arms, mounts, or additional axle components, check out the available parts in the BMW Suspension Replacement Kits category.

How to safely use used suspension parts

When choosing used suspension components, it is worth being guided not only by price but also by the origin of the part, compliance with the OEM number, and technical condition. It is good practice to consult a mechanic or suspension specialist who will assess whether a given component will meet the requirements of a specific car configuration and driving style.

If you want to better understand how to effectively use second-hand components in repairs and modifications of premium cars, check out the article Audi on second-hand parts – tuning and repairs without losing quality, where practical rules for selecting used elements and their impact on durability and vehicle handling characteristics are discussed.

Additional tips on optimizing service costs while maintaining the appropriate level of safety and quality are also provided in the guide Rising repair costs and the boom in used parts – how to save on car service?, which shows how to consciously choose used components, including suspension and drivetrain elements.