BMW Z4 Series E85 2.2i Roadster Rear Left N/S Suspension Leg Brake Axle Disc Set

BMW Z4 Series E85 2.2i Roadster Rear Left N/S Suspension Leg Brake Axle Disc Set is an original suspension component designed for the rear left side of the BMW Z4 E85 with the N46 engine. This precision-engineered component is responsible for proper wheel guidance, driving stability, and seamless integration with other suspension elements. By maintaining factory geometry, it provides a solid foundation for repairing or restoring the original handling characteristics of this model.

Specifications and technical data

• SKU: 6774775
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6774775
• Substitutable numbers: 33326774775, 6774775, 34216758127, 6758127, 33217529901, 7529901, 33217529905, 7529905, 34216794306, 6794306, 33326770819, 6770819, 33326757909, 6757909, 34211165031, 1165031, 34216766225, 6766225, 34216752545, 6752545
• Location on the vehicle: Rear, Left
• Category: Suspension Component Replacement Kits

Purpose and function in the suspension

The rear steering knuckle integrated with the half-shaft for the left side is responsible for stable wheel guidance, transferring loads from the body to the road, and maintaining the correct position of the hub relative to the wishbones and shock absorber. In the BMW Z4 E85, this element contributes to the model's characteristic precise handling, which is essential for both daily driving and dynamic performance.

The placement on the vehicle as rear – left side allows for clear identification of the component when planning repairs or replacements. Proper fitment for the specific N46 150HP engine version minimizes the risk of installation issues and ensures compatibility with the factory suspension design.

Benefits of using an original steering knuckle with half-shaft

Choosing an original element from the Suspension replacement kits group allows you to maintain the performance parameters specified by the vehicle manufacturer. In practice, this means:

• maintaining the correct rear axle geometry and predictable vehicle behavior in corners,
• proper cooperation with stock wishbones, shock absorbers, and wheel hubs,
• reduced risk of premature tire wear resulting from incorrect wheel alignment,
• easier adjustment of toe and camber after installation.

The component comes from BMW, which translates into maintaining factory mounting points and compatibility with the stock solutions used in the Z4 E85.

Installation characteristics and fitment

The steering knuckle with half-shaft is designed for installation in the rear part of the vehicle on the left side, which makes it easy for a mechanic to quickly assign the element to the specific suspension position. Thanks to the original design, it is possible to use stock bolts, bushings, and other mounting elements without the need for modifications.

The product has an assigned OEM part number and corresponding interchangeable numbers, which facilitates compatibility verification in service catalogs and parts selection systems. This is particularly important when working with specific equipment versions and model years of the BMW Z4 E85, where structural differences may exist between individual variants.

Condition of the element and practical application

The part is offered as used, which allows for an economical suspension repair while maintaining the original design specifications. This type of solution is often chosen for post-accident repairs, replacing components after mechanical damage, or restoring the car to a factory-like state after long-term use.

The rear left steering knuckle with half-shaft will work well both in the case of a single replacement of a damaged element and during broader work covering the entire rear axle, where maintaining structural consistency and proper cooperation of all components is key.

Suspension system expansion and technical knowledge

If you are planning a comprehensive repair or upgrade of the suspension area in your BMW and need other elements from the same group, such as wishbones, springs, or shock absorbers, check the available parts in the BMW suspension replacement kits category.

For a better understanding of the differences between stock and sport suspension configurations, as well as the principles of selecting used components, it is worth reading the article: Stock vs. sport suspension – design differences and is it worth buying used suspension parts?. This is a practical source of knowledge when planning repairs and modifications for the BMW Z4 E85.