Audi A4 B9 Wishbone Suspension Control Arm Rear Left N/S 8W0505323F

Audi A4 B9 Wishbone Suspension Control Arm Rear Left N/S is a component from the Control arms and ball joints group, designed for operation in the rear, left part of the suspension. It is responsible for precise wheel guidance, driving stability, and predictable vehicle behavior during braking and cornering. Thanks to its factory geometry and design tailored to the Audi A4 B9 platform, this control arm allows for maintaining proper suspension performance parameters.

Specifications and technical data

• SKU: 8W0505323F
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0505323F
• Substitutable numbers: 8W0505323F, 8W0 505 323 F
• Location on the vehicle: Rear, Left
• Category: Control Arms, Ball Joints & Assemblies

Purpose and placement in the suspension

The presented control arm operates in the rear axle of the vehicle, on the left side. It is a key element of the multi-link system, which is responsible for:

• maintaining proper wheel geometry on the rear axle,
• stable vehicle handling during load changes,
• control over wheel toe and camber while driving.

Such placement means that the component has a direct impact on ride comfort, handling precision, and even tire wear.

Technical and functional characteristics

The control arm has been designed specifically for the Audi suspension construction, maintaining appropriate stiffness and operating geometry. The properly selected shape and mounting points allow for:

• proper cooperation with other suspension elements,
• effective transfer of longitudinal and lateral forces,
• reduction of unwanted play and vibrations in the rear part of the body.

As a result, the suspension system maintains predictable reactions, and the car handles stably both during city driving and on the highway.

Condition of the component and benefits of use

The offered control arm is a used part, which allows for an economical replacement of the element while maintaining proper suspension performance parameters. Choosing such a solution is beneficial when:

• a quick replacement of a damaged control arm is necessary after a collision or hitting an obstacle,
• excessive play in the rear axle has been detected after a geometry inspection,
• you want to restore proper vehicle handling without investing in a complete new suspension set.

Using the correct control arm in the rear, left part of the suspension helps reduce vehicle pulling, improves stability during braking, and reduces the risk of uneven tire wear. It is a practical solution for users who expect a solid part on a reasonable budget.

Integration with the suspension system and driving safety

The control arm operating in the rear axle has a direct impact on safety, as it is responsible for keeping the wheel in the correct position relative to the body. A properly selected and functional element:

• limits uncontrolled geometry changes under load,
• improves vehicle stability at higher speeds,
• supports the operation of safety systems, such as ABS or ESP, by ensuring predictable tire contact with the road surface.

Thanks to this, the driver receives clear feedback from the rear axle, and the car behaves consistently with the manufacturer's design assumptions.

Technical support and additional information

To better understand the role of control arms in the entire suspension system and the symptoms of their wear, it is worth checking out our guide: Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers. The article explains how to take care of suspension elements in various models and how to recognize the first symptoms of wear.

If you are planning a comprehensive repair or upgrade of the suspension zone in your Audi and need other elements from the same group, such as additional control arms, ball joints, or guide elements, check the available parts in the Audi control arms and ball joints category.