Audi A4 B8 Wheel Hub Rear Left N/S Suspension Leg Wheel Brake Disc Caliper

Audi A4 B8 Wheel Hub Assembly Suspension Strut Rear Left Caliper Disc is a complete, used rear suspension component designed for the driver's side axle. The set includes key components responsible for wheel guidance, load transfer, and integration with the braking system, making it a practical service solution for Audi users. By maintaining the factory geometry and construction of the original Audi suspension, the part allows for precise repair without altering the manufacturer's design.

Specifications and technical data

• SKU: 8K0505431AP-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0505431AP
• Substitutable numbers: 8K0505431AP, 8K0 505 431 AP
• Location on the vehicle: Rear, Left
• Category: Wheel Bearings, Hubs & Seals

Vehicle Application and Placement

The presented component belongs to the category of Wheel Bearings, Hubs, and Bushings and is intended for installation on the rear axle, left side. The wheel hub assembly with the strut forms the central connection point for the hub, bearing, suspension elements, and brake caliper to the disc, ensuring proper wheel guidance in both vertical and horizontal planes.

Its placement on the vehicle is clearly defined as rear – left side, which simplifies part selection for collision repairs, replacement due to wear and tear, or restoring suspension geometry to factory specifications.

Assembly Structure and Component Functions

The complete wheel hub assembly with strut, caliper, and disc forms a cohesive assembly unit that integrates several key functions:

• guiding the wheel hub and bearing along the axis of rotation,
• providing stable mounting for control arms and suspension bushings,
• ensuring precise positioning of the caliper relative to the brake disc,
• transferring loads from the wheel to the chassis through suspension elements.

This service solution allows for the replacement of the entire assembly in a single installation process, reducing the risk of component mismatch and speeding up workshop operations.

Benefits of Using an Original Audi Component

The original design prepared for the Audi A4 B8 platform ensures the preservation of factory mounting points, suspension operating angles, and integration with the braking system. In practice, this means:

• easier geometry alignment after component replacement,
• correct fitment with existing control arms and bushings,
• compatibility with the factory rear axle braking system.

For the user, this translates to stable vehicle handling, predictable cornering behavior, and consistent braking system performance on the left rear axle. Maintaining the original suspension architecture is particularly important in premium vehicles where driving precision and ride comfort are key design features.

Application in Repairs and Upgrades

This wheel hub assembly with strut, caliper, and disc is particularly useful in situations involving mechanical damage to the rear suspension, deformation after hitting a curb, or the need to replace multiple components simultaneously. Using a complete module allows for:

• minimizing diagnostic and individual part disassembly time,
• reducing the number of potential mismatch points,
• achieving a consistent, factory-standard mounting and wheel guidance system.

This type of solution is often chosen by workshops specializing in the Audi brand, as it facilitates compliance with service documentation and the manufacturer's design parameters.

Audi Wheel Bearings, Hubs, and Bushings – Selecting Related Components

If you plan to replace other components responsible for wheel guidance and support on your Audi's rear suspension during repairs, such as additional hubs, bearings, or bushings working with the rear axle, check the available parts in the Audi Wheel Bearings, Hubs, and Bushings category.

Why Consider a Used Wheel Hub Assembly?

For suspension and braking system components, many drivers consider used parts as a sensible compromise between repair cost and maintaining the vehicle's original construction. A properly selected, used wheel hub assembly with strut, caliper, and disc allows for the restoration of full rear axle functionality while preserving the factory specifications. If you want to better understand how to safely navigate the used parts market and what to look for when purchasing such components, read the article Used Car Parts: Myths and Facts You Need to Know.