£BMW 3 Series E90 320d N47 Rear Left N/S Suspension Leg Axle Brake Disc

£BMW 3 Series E90 320d N47 Rear Left N/S Suspension Leg Axle Brake Disc is a complete rear suspension solution designed for the left-hand drive axle. This component, belonging to the Suspension replacement kits category, allows for efficient and technically correct restoration of the geometry and drivetrain in the BMW 3 Series E90 with the 177 HP N47 engine.

Specifications and technical data

• SKU: 6774809-17
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6774809
• Substitutable numbers: 33326774809, 6774809, 34216768697, 6768697, 33326774805, 6774805, 33326757079, 6757079, 33326761581, 6761581, 34216764651, 6764651, 34216855007, 6855007
• Weight: 150
• Location on the vehicle: Rear, Left
• Category: Suspension Component Replacement Kits

Purpose and vehicle placement

The presented set includes the steering knuckle with a half-shaft mounted in the rear axle area, on the left side. This combination of elements is responsible for stable wheel guidance, proper torque transmission, and maintaining correct suspension geometry in rear-wheel-drive BMW vehicles. Its placement in the rear zone means the component operates in direct proximity to the braking system and guiding elements, which requires maintaining appropriate rigidity and precision of workmanship.

Technical and functional characteristics

The steering knuckle integrated with the half-shaft is a key element of the suspension and drivetrain system, responsible for:

• guiding the wheel in the vertical and horizontal axis,
• stable mounting of the hub and brake components,
• transferring drive from the differential to the wheel,
• maintaining specified camber and toe angles in the rear of the vehicle.

Thanks to its factory design tailored to the BMW 3 Series E90 with the N47 unit, the set works with the original suspension architecture, which facilitates installation and reduces the need for additional modifications. The specific weight of the component ensures appropriate rigidity and resistance to operational loads typical for a drive axle.

Benefits of using a complete suspension kit

Choosing a complete solution, such as the steering knuckle with a half-shaft for the left side of the rear axle, allows for:

• maintaining structural consistency within the suspension and drivetrain,
• reducing the risk of mismatching individual elements,
• speeding up the service process by installing an assembly instead of individual parts,
• maintaining proper vehicle handling and driving comfort after the repair.

The product comes from the Suspension replacement kits group, which means it was designed for comprehensive service of the rear driving zone, rather than just replacing a single sub-assembly.

Condition, origin, and fitment

The offered element is part of the original BMW suspension system, which translates into factory fitment for the body and chassis structure of the 3 Series E90 with the N47 engine. The used nature of the component allows for an economical restoration of the rear axle while maintaining proper operating parameters. Before installation, standard verification of the working condition at a specialized service center and a suspension geometry check after the work is completed are recommended.

Expanding BMW suspension upgrades

If you are planning a comprehensive repair or upgrade of the suspension zone in your BMW and need other elements from the same group, such as control arms, subframes, or additional rear axle sub-assemblies, check the available parts in the BMW suspension replacement kits category.

Technical knowledge and selection of used components

When selecting used suspension and drivetrain elements, it is worth using reliable sources of information regarding the quality and cost-effectiveness of such solutions. A material describing the specifics of original premium components and their use in service, available in the blog post about used original parts from dismantling in premium class cars, may be helpful. For BMW users interested in a broader technical context, including the differences between standard and sports running gear, additional information is provided in the article about BMW M and M Performance components, where aspects of suspension and the sense of using used parts are discussed.