BMW 1 E81 E87 LCI 120i N43 Rear Right O/S Spring Strut Leg Brake Suspension Hub

BMW 1 E81 E87 LCI 120i N43 Rear Right O/S Spring Strut Leg Brake Suspension Hub is an original suspension component designed for the rear right side of the vehicle, specifically engineered for BMW models equipped with the 170 HP N43 engine. Thanks to its factory geometry and precise fitment for the specific axle, it ensures stable handling, accurate wheel alignment, and safe load distribution during daily operation. This is the ideal solution for users seeking consistency with the factory suspension design and wishing to maintain the original driving characteristics of their BMW.

Specifications and technical data

• SKU: 6774810-21
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6774810
• Substitutable numbers: 33326774810, 6774810, 34216776378, 6776378, 33217547070, 7547070, 33217523960, 7523960, 34216855002, 6855002, 33326774806, 6774806, 33326757080, 6757080, 33326761582, 6761582, 34216768192, 6768192, 34214031725, 4031725, 34216769271, 6769271, 34216764649, 6764649
• Location on the vehicle: Rear, Right
• Category: Suspension Component Replacement Kits

Purpose and function in the BMW suspension

The steering knuckle with the half-shaft on the rear right side is responsible for stable wheel guidance, transferring forces from the suspension to the chassis, and maintaining correct geometry settings. Combined with other suspension components, it creates a rigid, predictable mounting point, which translates into confident vehicle behavior during acceleration, braking, and cornering.

In the BMW E81 120i N43 model, this component works with the factory multi-link rear axle design, ensuring:

• precise maintenance of camber and toe angles,
• effective transfer of drive torque to the road surface,
• appropriate stiffness of connections in the hub and half-shaft mounting area.

Compatibility and fitment for BMW

The component in question belongs to the Suspension replacement kits group, meaning it is designed to maintain consistency with other rear axle components. The vehicle placement defined as rear – right side allows for clear identification of its mounting position and helps avoid errors when selecting parts.

Thanks to the use of the original BMW design, the following are maintained:

• proper mounting points for control arms and the chassis,
• compliance with factory assembly tolerances,
• the ability for trouble-free future servicing (e.g., geometry adjustment).

Characteristics of the used component

The presented steering knuckle with half-shaft is a used part, sourced from vehicle dismantling, which offers a reasonable compromise between cost and maintaining the original BMW specification. In practice, this means access to factory-quality manufacturing and fitment at a lower cost than a new component.

Choosing an original used part is particularly beneficial for advanced suspension sub-assemblies, where the following are crucial:

• accuracy of mounting surface machining,
• material compliance with the manufacturer's design,
• predictable behavior during long-term operation.

Benefits of using the original steering knuckle with half-shaft

Using a steering knuckle with half-shaft dedicated to the BMW E81 120i N43 allows you to maintain factory handling characteristics and reduce the risk of suspension geometry issues after repair. This is particularly important in cars with a dynamic character, where the precision of the suspension system directly affects safety and driving comfort.

The main advantages of this solution include:

• preservation of the original rear axle operating characteristics,
• easier diagnostics and adjustment at the service center,
• consistency with other BMW suspension components.

Technical support and part selection

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

When planning repairs to the drivetrain and suspension, it is also worth paying attention to the selection of original used parts for other sub-assemblies. You can find more about the cost-effectiveness of this approach for key drivetrain components in the article: Manual transmission failures in cars – why is an original used part a more sensible choice than regeneration?.