Audi S5 8T Front Suspension Lower Control Arm Wishbone Left N/S 8K0407155B

Audi S5 8T Front Suspension Lower Control Arm Wishbone Left N/S is a component from the Control arms and ball joints category, designed for the front suspension on the left side. It is responsible for precise wheel guidance, driving stability, and correct geometry, which directly impacts vehicle safety and predictable handling.

Specifications and technical data

• SKU: 8K0407155B-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0407155B
• Substitutable numbers: 8K0407155B, 8K0 407 155 B, 8K0 407 151 D, 8K0407151D
• Location on the vehicle: Front, Left
• Category: Control Arms, Ball Joints & Assemblies

Purpose and function in the suspension

The front lower control arm in the Audi S5 8T model operates at a critical point of the chassis, transferring loads from the wheel to the body and maintaining a stable position of the hub relative to the chassis. The vehicle placement, defined as front – left side, allows for precise identification of the mounting location, which reduces the risk of ordering errors and speeds up the service process.

The control arm works in conjunction with the ball joint and other components of the multi-link suspension, ensuring proper suspension kinematics during braking, acceleration, and cornering. A correctly selected and functional component helps maintain even tire wear, stability at higher speeds, and comfortable damping of road irregularities.

Technical characteristics and fitment

The offered control arm belongs to the Control arms and ball joints category, meaning it is designed to work in direct connection with components responsible for wheel guidance and the transfer of lateral and longitudinal forces. The construction is prepared for installation at factory mounting points, ensuring that the original suspension geometry intended by Audi engineers is maintained.

The product comes from the Audi parts group, which in practice means maintaining the correct rigidity, proper weight distribution, and compatibility with standard chassis components. This is particularly important in high-performance cars such as the S5 8T, where the suspension operates under higher loads than in standard versions.

Condition, service application, and benefits of installation

The item is offered as a used part, which provides a reasonable compromise between repair costs and maintaining the vehicle's original specifications. This type of component is suitable for both standard replacement of a worn control arm and post-collision repairs, where it is necessary to restore the correct front axle geometry.

Replacing the front left lower control arm is recommended, among other situations, when there are knocks in the suspension, noticeable wheel play, instability during braking, or problems with wheel alignment. Using the correct component allows you to:

• restore vehicle handling precision,
• reduce excessive tire wear,
• increase the predictability of the car's behavior in corners,
• maintain driving comfort at a level consistent with the manufacturer's standards.

Technical support and suspension knowledge

If you want to better understand how the suspension system in your car works and what role control arms, shock absorbers, and stabilizers play, it is worth consulting verified technical materials. Practical information, examples of wear symptoms, and service tips can be found in the article Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers, which will help you consciously plan repairs and select the right components.

Related Audi suspension components

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