Audi A5 8T A4 B8 8K Rear Wheel Knuckle Hub Left N/S 8K0505431AE

Audi A5 8T A4 B8 8K Rear Wheel Knuckle Hub Left N/S is a factory suspension component designed for the rear axle on the left side in selected Audi models. It is responsible for precise wheel guidance, stable hub mounting, and correct suspension geometry, which translates into predictable vehicle handling and safe driving. Thanks to a design consistent with the manufacturer's specifications, the steering knuckle ensures proper compatibility with factory suspension and braking system components.

Specifications and technical data

• SKU: 8K0505431AE
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0505431AE
• Substitutable numbers: 8K0505431AE, 8K0 505 431 AE
• Location on the vehicle: Rear, Left
• Category: Steering Knuckles

Purpose and function in the suspension

The rear left steering knuckle in the Audi A4 B8 and A5 8T is a key element connecting the control arms, wheel hub, and braking system components. Its tasks include:

• maintaining a stable wheel position relative to the body,
• ensuring correct suspension geometry angles,
• transferring loads from the wheel to other suspension components,
• providing a rigid and secure mounting for the hub and wheel bearing.

Thanks to its properly designed geometry, the steering knuckle supports even tire wear, improves driving stability, and influences vehicle handling comfort.

Construction and fitment for the rear axle

The presented steering knuckle is intended for installation on the rear axle on the left side, which means its shape, mounting points, and spacing are adapted to the specific position in the vehicle. The design provides mounting points for:

• suspension control arms,
• wheel hub and bearing,
• braking system components suitable for the given model.

Such fitment allows for maintaining factory suspension operating parameters and eliminates the need for installation modifications.

Benefits of using an original Audi steering knuckle

Using a steering knuckle from the Audi group allows for maintaining the structural integrity of the entire chassis system. The most important advantages include:

• compatibility with factory mounting points and suspension geometry,
• reliable cooperation with original control arms, hub, and brakes,
• maintaining predictable vehicle handling after repair,
• reducing the risk of problems with wheel alignment and camber settings.

For users who expect stable vehicle behavior after replacing suspension components, choosing such a steering knuckle is a technically safe and predictable solution.

Component condition and service application

The steering knuckle is primarily used for post-accident repairs, replacing components after mechanical damage, or during comprehensive rear suspension restoration. It enables the restoration of proper wheel guidance and eliminates play resulting from structural damage to the previous component. Selecting the correct steering knuckle for a specific Audi model is crucial for maintaining safety and the proper operation of the entire chassis system.

Repair expansion and related components

When replacing the rear left steering knuckle, it is worth considering a simultaneous inspection of the condition of control arms, bushings, wheel bearings, and fasteners to avoid re-disassembling the suspension in the near future. If you are planning a comprehensive repair or upgrade of the rear suspension zone in your Audi and need other components from the same group, such as additional steering knuckles, brackets, or mounts, check the available parts in the Audi Steering Knuckles category.

For users also interested in vehicle lighting and selecting used lighting components during major body repairs, a guide on LED and Xenon headlights may be helpful – you can find it in the article See more and better – a complete guide to selecting and replacing used LED and Xenon headlights.