BMW 1 F20 M140i M Sport Rear Right O/S Suspension Leg Axle Brake Disc Hub

BMW 1 F20 M140i M Sport Rear Right O/S Suspension Leg Axle Brake Disc Hub is a factory-original chassis component, including the suspension strut, axle, hub, and brake disc on the passenger side. By maintaining the original geometry and performance characteristics, this item from the Suspension replacement kits category helps restore the vehicle's predictable handling and stability. It is a practical solution for users who want to replicate the factory driving dynamics of the M140i M Sport version without the high cost of sourcing individual components.

Specifications and technical data

• SKU: 6880945-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6880945
• Substitutable numbers: 33526880945, 6880945, 33326792516, 6792516, 34216860738, 6860738, 33207597686, 7597686, 34206797605, 6797605
• Location on the vehicle: Rear, Right
• Category: Suspension Component Replacement Kits

Purpose and function in the chassis system

This rear right suspension assembly is designed for installation on the drive axle of the BMW 1 Series F20 in the M140i M Sport version. It includes key components responsible for transferring loads from the body to the wheel, guiding the hub in the correct position, and interacting with the braking system via the integrated brake disc.

The placement on the passenger side at the rear ensures compatibility with the factory suspension geometry, which is essential for:

• maintaining proper toe and camber angles,
• stability at higher speeds,
• even operation of the rear axle braking system,
• correct functioning of assistance systems (ABS, traction control – regarding interaction with the hub and disc).

Kit construction and benefits of a complete unit

The assembly includes a suspension strut with body and steering knuckle mounts, an axle/control arm, a wheel hub, and a brake disc, creating a cohesive, factory-matched system. Using a complete assembly instead of individual parts reduces the risk of dimensional mismatch and simplifies workshop installation.

The main advantages of this solution include:

• structural consistency – components selected to work together as a single system,
• easier diagnostics and replacement – the mechanic works with a ready-to-install unit,
• preservation of M Sport characteristics, essential for precise handling,
• reduced vehicle downtime in the service center due to fewer operations.

Original BMW origin and installation compatibility

The product comes from the BMW line, which means it maintains factory manufacturing standards and fitment for the F20 body. Its original origin translates into proper alignment of mounting points, appropriate stiffness of load-bearing elements, and compatibility with standard wheels and the braking system of the M140i M Sport version.

The assembly has a dedicated OEM part number and associated interchangeable numbers, which facilitates verification of compatibility with a specific vehicle configuration. Before purchasing, it is recommended to compare the markings with service documentation or the part number removed from the car to confirm full compatibility.

Performance characteristics and service application

As an item from the Suspension replacement kits category, this assembly is particularly useful in situations where mechanical damage to the rear right corner has occurred – for example, after a collision, hitting a curb, or due to intensive wear. The complete kit allows for the restoration of:

• stable cornering,
• proper operation of the braking system on the given wheel,
• even tire wear on the rear axle,
• driving comfort typical of the M Sport version.

The used nature of the part makes it an economical solution while still being based on the original BMW design, which is often advantageous compared to cheaper aftermarket replacements with uncertain geometry.

Installation tips and technical support

Due to the importance of this component for safety and suspension geometry, installation should be performed in a professional workshop using appropriate tools, followed by a wheel alignment check on the rear axle. After replacement, it is recommended to check the operation of the braking system and perform any necessary electronic system adaptations if required by the service procedure for the specific model.

For drivers who want to better understand the role of individual suspension components and the impact of their condition on driving safety, the following guide will be helpful: Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers. The article explains how to maintain key suspension elements in various car models, which facilitates making informed service decisions.

If you are planning a comprehensive repair or upgrade of the rear axle suspension area in your BMW and need other components from the same group, such as additional struts, control arms, or complete hub-disc assemblies, check out the available parts in the BMW Suspension replacement kits category.