£BMW 3 Series E90 320si N45 Rear Left N/S Suspension Leg Axle Brake Hub

£BMW 3 Series E90 320si N45 Rear Left N/S Suspension Leg Axle Brake Hub is a complete, used component from the Suspension Replacement Kits category, designed for installation on the rear axle on the driver's side. This type of solution allows for the efficient replacement of a damaged suspension module along with the hub and brake assembly, which facilitates servicing and restores proper geometry and handling stability.

Specifications and technical data

• SKU: 6774807-7
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6774807
• Substitutable numbers: 33326774807, 6774807, 34216768697, 6768697, 34216864901, 6864901, 33207580945, 7580945, 33217527027, 7527027, 33326757735, 6757735, 34216855008, 6855008, 34216764653, 6764653, 33217553559, 7553559
• Location on the vehicle: Rear, Left
• Category: Suspension Component Replacement Kits

Purpose and function in the chassis system

The described component combines the load-bearing function of the rear suspension with the base for mounting the wheel hub and brake components. It is mounted on the rear left side of the vehicle, responsible for transferring loads from the wheel to the body, maintaining the correct position of the wheel relative to the body, and ensuring stable cooperation with the shock absorber and spring.

A module configured in this way is particularly important in the BMW 3 Series E90 320si N45 model, where handling precision and rear axle stiffness have a direct impact on the car's behavior in corners, braking efficiency, and ride comfort.

Construction of the suspension and brake assembly

The suspension leg provides a rigid mounting point for chassis components, ensuring proper wheel geometry and a stable connection to the body. The integrated hub and brake assembly allows for the mounting of the disc, caliper, and sensors, which translates into the correct operation of the braking system and auxiliary systems.

Combining these into a single module facilitates servicing: the replacement is carried out as a single unit, without the need to separate multiple components, which reduces the risk of assembly errors and shortens workshop labor time.

Application of the used suspension assembly

A used suspension assembly with hub and brake is a practical solution for post-accident repairs or replacing components due to corrosion or mechanical wear. It allows for the restoration of proper rear axle operation while maintaining a favorable cost-to-effect ratio, especially in specialized versions such as the 320si.

When choosing such an element, it is worth paying attention to compatibility with the specific engine and body version, as well as matching the existing braking system to maintain the consistency of the entire chassis system's operating parameters.

Selection, compatibility, and technical aspects

The component should be selected based on compatibility with the specific BMW 3 Series E90 model and the 320si N45 version, taking into account its location on the vehicle (rear, left side). In practice, this means matching it to:

• the geometry and construction of the rear axle of the given model,
• the layout of suspension and brake mounting points,
• the existing braking system and the diameter and type of discs used.

Thanks to this, after installation, it is possible to maintain proper handling, even tire wear, and stable operation of safety systems.

Support with selection and additional information

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

When selecting used suspension components, it is worth knowing the structural differences between standard and sports solutions and their impact on handling and durability. A detailed discussion of these issues, along with practical tips on purchasing used suspension components, can be found in the article Standard vs. sports suspension – construction differences and is it worth buying used suspension parts?.