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

Audi A4 B9 A5 F5 Front Left Control Arm is a component from the Control Arms and Ball Joints group, designed for the front suspension on the driver's side. It is responsible for precise wheel guidance, driving stability, and correct geometry, which translates into safe and predictable vehicle behavior. Thanks to its construction compliant with manufacturer standards, it provides a solid foundation for professional suspension system repairs in Audi models.

Specifications and technical data

• SKU: 8W0407155A
• 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 Role in the Suspension System

The presented control arm operates on the front axle, on the left side of the vehicle, forming part of the multi-link suspension wheel guidance system in Audi. Its tasks include:

• maintaining the correct position of the wheel hub relative to the body during straight-line driving and cornering,
• controlling wheel camber and toe angles,
• damping some of the vibrations transmitted from the road to the body through cooperation with ball joints and other suspension elements.

A properly selected control arm allows for restoring correct vehicle handling after replacing worn or damaged components, which directly impacts driving safety and comfort.

Compatibility with Audi Platform

The Audi A4 B9 A5 F5 Front Left Control Arm has been designed with the suspension structure used in modern Audi mid-size models in mind. The arm's geometry, mounting points, and operating characteristics are adapted to factory requirements, facilitating installation and subsequent geometry adjustments.

By adhering to the original design concept, the control arm works with standard shock absorbers, springs, stabilizers, and other steering system components without the need for modifications.

Performance Characteristics and Benefits of Use

The front left control arm for Audi A4 B9 and A5 F5, as a component from the Control Arms and Ball Joints category, has been developed to maintain proper rigidity and appropriate flexibility at the points of connection with the body and the steering knuckle. In practice, this means:

• stable vehicle handling at higher speeds,
• more predictable behavior in corners,
• reduction of unwanted play in the suspension,
• better utilization of tire grip.

The appropriate design of the control arm promotes even tire wear and facilitates maintaining correct geometry after adjustments at a diagnostic station.

Component Condition and Service Application

The offered control arm is a used part, making it an attractive solution for repairs where reasonable cost is important while maintaining compliance with the factory design. This type of component is suitable for both standard replacement of worn suspension parts and for rebuilding the front of the vehicle after mechanical damage.

Due to its location on the front axle, left side, replacing the control arm is particularly recommended in situations where symptoms such as the car pulling to one side, instability during braking, or uneven tire wear occur.

Comprehensive Audi Suspension Zone Service

If you are planning a comprehensive repair or upgrade of the suspension zone in your Audi and need other parts from the same group, such as additional control arms, ball joints, or cooperating components in the wheel guidance system, check the available parts in the Audi Control Arms and Ball Joints category.

To better understand the relationships between individual suspension components and the symptoms of their wear, it is worth consulting a technical guide – practical information can be found in the article Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers, which discusses the principles of diagnostics and operation of key elements of this system.