Audi A4 A5 B9 Control Arm Wishbone Rear Left Right N/S 8W0505311H

Audi A4 B9 Front Left Right Rear Control Arm is a component from the Control Arms & Ball Joints category, designed for the rear axle of the vehicle. It ensures stable vehicle handling, precise suspension geometry maintenance, and predictable car behavior during braking and cornering.

Specifications and technical data

• SKU: 8W0505311H
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0505311H
• Substitutable numbers: 8W0505311H, 8W0 505 311 H
• Location on the vehicle: Rear, Left
• Category: Control Arms, Ball Joints & Assemblies

Purpose and Placement in Suspension

The presented control arm is designed for installation on the rear axle, on the left side. It is responsible for maintaining the correct wheel position relative to the body, transferring loads from the road to the chassis, and cooperating with other elements of the multi-link suspension. This allows the suspension to operate smoothly, and the wheel to maintain optimal contact with the road surface.

This component is particularly important for:

• maintaining correct wheel toe and camber angles,
• vehicle stability at higher speeds,
• reducing unwanted play in the suspension system,
• even tire wear.

Technical and Functional Characteristics

The control arm operates within a multi-link system typical for Audi models, where each element has a precisely defined function and direction of force transfer. The construction is adapted for cooperation with ball joints and metal-rubber bushings, which allows for controlled deflections and turns of the suspension without losing steering rigidity.

Thanks to its factory geometry and appropriately selected stiffness, the control arm helps to reduce:

• body roll when changing lanes,
• rear-end "float" during acceleration and braking,
• vibrations transmitted to the body over road imperfections.

Benefits of Using an Original Audi Control Arm

Using an original Audi Group component to replace a worn or damaged part allows you to maintain the vehicle's original driving characteristics. Precise fit to the suspension design minimizes the risk of geometry issues, squeaking, or excessive play after installation.

Key advantages include:

• consistency with the factory design of the Audi A4 B9 suspension,
• appropriate stiffness and operating characteristics under load,
• possibility of correct geometry alignment after replacement,
• maintaining predictable car behavior in emergency situations.

Component Condition and Service Application

The offered control arm comes from the used parts segment, allowing for economical suspension repair while maintaining the original construction. This solution is particularly beneficial for comprehensive rear suspension refurbishment when several elements are replaced simultaneously.

In practice, such a control arm is suitable for, among others:

• mechanical damage after a collision or impact with an obstacle,
• excessive play detected during a technical inspection,
• uneven tire wear resulting from geometry problems.

Audi Control Arms & Ball Joints – Selection and Additional Information

If you need other elements from the Control Arms & Ball Joints category dedicated to this brand, check out the Audi control arms and ball joints available in our store to select a complete solution for your suspension.

When planning suspension repairs, it is worth expanding your knowledge about the operation of the entire system. Practical tips on operation and diagnostics can be found in the article Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers, which discusses the relationships between individual components and their impact on driving safety.