Audi A5 F5 Rear Axle Wheel Hub Knuckle Bearing Left N/S Side 8W0505431Q

Audi A5 F5 Rear Axle Wheel Hub Knuckle Bearing Left N/S Side is a factory-original suspension component designed for the rear axle on the driver's side. Thanks to its design, which complies with the manufacturer's standards, it ensures precise wheel guidance, body stability, and proper integration with the suspension and braking systems.

Specifications and technical data

• SKU: 8W0505431Q-3
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0505431Q
• Substitutable numbers: 8W0505431Q, 8W0 505 431 Q, 8W0615403, 8W0 615 403, 8W0615601C, 8W0 615 601 C
• Location on the vehicle: Rear, Left
• Part type: Wheel Hub & Bearing Assembly
• Category: Wheel Bearings, Hubs & Seals

Application and function in the suspension system

The steering knuckle integrated with the rear wheel hub and bearing is responsible for stable hub seating, transferring loads from the wheel to the suspension, and maintaining proper axle geometry. The location on the vehicle is the rear left side, which is crucial when selecting parts for a specific version of the Audi A5 F5. This component works in conjunction with control arms, the shock absorber, the braking system, and safety system sensors; therefore, its correct selection has a direct impact on:

• maintaining specified wheel camber and toe-in angles,
• even tire wear,
• vehicle stability during braking and acceleration,
• driving comfort at higher speeds.

Benefits of using an original Audi component

The original steering knuckle with hub and bearing from the Bearings, wheel hubs, and bushings group ensures a perfect fit to factory mounting points without the need for modifications. Dimensional and material compliance with the manufacturer's design is maintained, which facilitates installation and subsequent geometry adjustment. Compared to generic replacements, the factory component reduces the risk of improper fitment, excessive play, or bearing noise, and minimizes the need for re-adjustments after a short period of use.

Condition, verification, and preparation for installation

The offered item is in used condition, which, in the case of original Audi parts, often represents a favorable compromise between quality and repair cost. The steering knuckle with hub and bearing is a good choice for post-accident repairs, replacement after mechanical damage, or in the event of excessive bearing wear. Before installation, standard workshop procedures are recommended: inspection of mounting surfaces, threads, bolt sockets, and smooth rotation of the hub. A correctly installed component restores factory handling characteristics and prepares the vehicle for precise rear axle geometry alignment.

Part selection and compatibility

To ensure that the steering knuckle with hub and bearing is suitable for a specific version of the Audi A5 F5, it is worth verifying:

• location on the vehicle (rear, left side),
• compatibility with the body style and model year,
• type of suspension used in the specific vehicle. The product has a dedicated OEM part number and associated interchangeable numbers, which facilitates unambiguous identification in service catalogs and part selection systems.

Repair expansion and related components

If you are planning a comprehensive repair or upgrade of the suspension and chassis area in your Audi and need other elements from the same group, such as hubs, bearings, or bushings, check the available parts in the Audi bearings, wheel hubs, and bushings category. When deciding between a new replacement and an original component from the secondary market, it is worth learning about the broader technical and economic context – the article The myth of the perfect new part: why a used factory part is the only reasonable choice for older cars? will be helpful, as it discusses the advantages of proven used components for premium cars.