Audi A4 B9 A5 F5 Wishbone Control Arm Front Left N/S 8W0407155A

Audi A4 B9 A5 F5 Wishbone Control Arm Front Left N/S is an original component from the Control arms and ball joints group, designed for operation in the front suspension on the left side. Engineered by the vehicle manufacturer, it ensures proper steering geometry, stable handling, and predictable vehicle behavior during braking and cornering.

Specifications and technical data

• SKU: 8W0407155A-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0407155A
• Substitutable numbers: 8W0407155A, 8W0 407 155 A
• Location on the vehicle: Front, Left
• Category: Control Arms, Ball Joints & Assemblies

Purpose and function in the suspension

The presented control arm is dedicated to the front axle on the left side, where it is responsible for the precise guidance of the wheel relative to the body. As a structural suspension component, it works in conjunction with other system parts, maintaining the correct wheel camber and toe angles, which translates into driving stability and even tire wear. Thanks to the factory geometry and fitment for the specific vehicle platform, the control arm helps maintain predictable vehicle reactions to steering inputs and reduces unwanted vibrations transmitted to the body. This is particularly important in premium class cars, where high comfort and driving confidence at higher speeds are expected.

Benefits of using an original control arm

Using an original control arm in the front suspension provides a number of practical operational benefits:

• preservation of the vehicle's factory handling characteristics,
• proper cooperation with other suspension and steering system components,
• appropriate structural rigidity and durability under typical road conditions,
• reduction of the risk of premature tire wear resulting from incorrect geometry. For the user, this means more confident vehicle behavior on uneven surfaces, better control, and higher driving comfort. Replacing a worn control arm with a factory-specification component is also an essential step in restoring the proper operation of the entire suspension system.

Professional installation and fitment

The control arm intended for installation on the front left side is structurally prepared to work with factory mounting points on the body and steering knuckle. This allows for the use of standard service procedures and workshop tools, which facilitates the mechanic's work and reduces replacement time. After installation, it is recommended to perform a suspension geometry adjustment to fully utilize the potential of the newly installed component. Correctly set wheel toe and camber translate into stable handling as well as more even loading of other chassis components.

Control arms in the suspension system – knowledge for the demanding

For those who want to better understand the role of control arms in the entire chassis system, a specialized guide is recommended. It discusses in detail the cooperation of shock absorbers, control arms, and stabilizers in various car models, pointing out typical signs of wear and good service practices – more information can be found in the article Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers.

Expanding suspension work on your Audi

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