BMW Z4 Series E85 Roadster Rear Right O/S Suspension Leg Axle Trailing Arm

BMW Z4 Series E85 Roadster Rear Right O/S Suspension Leg Axle Trailing Arm is an original suspension component designed for the rear axle on the right side, specifically engineered for BMW Z4 E85 models. Thanks to its factory geometry and precise manufacturing, it ensures stable handling, predictable vehicle behavior, and consistency with the factory BMW suspension characteristics.

Specifications and technical data

• SKU: 6774776-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6774776
• Substitutable numbers: 33326774776, 6774776, 33416752381, 6752381, 34211158992, 1158992, 33326770820, 6770820, 33326757910, 6757910, 34211160644, 1160644
• Location on the vehicle: Rear, Right
• Category: Suspension Component Replacement Kits

Purpose and function in the suspension system

The presented trailing arm with steering knuckle is responsible for transferring loads from the wheel to the chassis and maintaining the correct geometry of the rear axle in the BMW Z4 E85. Its placement on the vehicle is the rear axle on the right side, which is crucial for part selection and maintaining suspension symmetry.

Combining the trailing arm with the steering knuckle into a single assembly reduces the risk of installation errors, facilitates servicing, and allows for faster replacement of the entire sub-assembly in the event of mechanical damage or operational wear.

Compatibility and reference numbers

The item belongs to the Suspension repair kits group, meaning it was designed as a component that works in harmony with other rear suspension parts of the BMW. The part has a dedicated OEM number and assigned interchangeable numbers, making it easy to verify its compatibility with a specific vehicle configuration in manufacturer catalogs or service systems.

The presence of reference numbers enables seamless matching to the correct version of the BMW Z4 E85, minimizing the risk of installing an incorrect part and the associated problems with geometry, handling, or braking system operation.

Product characteristics and condition

The trailing arm with steering knuckle is an original BMW brand part, which translates into maintaining factory strength parameters and compatibility with other rear suspension components. The design was developed with the specific characteristics of the BMW Z4 E85 in mind, including weight distribution, drivetrain, and the car's sporty purpose.

The offered sub-assembly is in used condition, which allows for cost-effective repair or restoration of the suspension while maintaining the original manufacturer's specifications. This solution is particularly beneficial for post-accident repairs, renovations, and projects where both quality and cost control are important.

Practical application and installation benefits

Replacing the complete trailing arm with the steering knuckle on the rear axle on the right side is recommended in situations such as:

• mechanical damage after a collision or hitting an obstacle,
• excessive wear of mounting elements and bearings within the steering knuckle,
• problems with rear axle geometry alignment,
• modernization or comprehensive suspension restoration in the BMW Z4 E85.

By using the original trailing arm and steering knuckle assembly, you achieve structural consistency with the factory BMW design, which translates into predictable handling, proper cooperation with the braking system, and stability at higher speeds.

Expansion of service work and knowledge about used parts

If you are planning a comprehensive repair or modernization of the rear suspension area in your BMW and need other elements from the same group, such as transverse control arms, bushings, or mounts, check the available parts in the BMW suspension repair kits category.

When selecting used suspension components, it is worth knowing good practices related to assessing technical condition, the cost-effectiveness of regeneration, and the impact of such parts on safety and driving comfort. A broader context on the use of pre-owned sub-assemblies in premium cars can be found in the article Audi on second-hand parts – tuning and repairs without losing quality, which discusses the approach to used components in a universal way, also useful for BMW owners.

Summary

BMW Z4 Series E85 Roadster Rear Right O/S Suspension Leg Axle Trailing Arm is a functional, original suspension element designed for the rear axle on the right side, allowing for the restoration of correct geometry and handling stability. Choosing this sub-assembly is a sensible solution for drivers who want to maintain the characteristic driving properties of the BMW Z4 E85 while optimizing repair costs through the use of a proven, used part.