Audi A4 B6 Front Axle Lower Wishbone Control Arm Left N/S 8E0407151M

Audi A4 B6 Front Axle Lower Wishbone Control Arm Left N/S is a suspension component designed for installation on the front axle on the driver's side. As a part of the Wishbones and ball joints group, it is responsible for precise wheel guidance, driving stability, and correct suspension geometry, which directly impacts safety and driving comfort.

Specifications and technical data

• SKU: 8E0407151M
• Mark: Audi
• Condition: Used
• OEM Part Number: 8E0407151M
• Substitutable numbers: 8E0407151M, 8E0 407 151 M
• Location on the vehicle: Front, Left
• Category: Control Arms, Ball Joints & Assemblies

Purpose and function in the Audi A4 B6 suspension

The front axle lower control arm in the Audi A4 B6 generation operates within a multi-link suspension system, transferring loads between the steering knuckle and the body. It is responsible for:

• maintaining the correct wheel position relative to the body during straight-line driving and cornering,
• stable vehicle handling during braking and acceleration,
• reducing unwanted play in the suspension, which can cause vibrations and vehicle pulling,
• maintaining correct wheel camber and toe-in angles.

The placement on the vehicle, defined as front, left side, allows for the unambiguous identification of the component's position in the suspension system and ensures it is matched to the specific mounting point.

Technical characteristics and installation

The control arm is structurally prepared for operation in the Audi front suspension, with appropriately shaped mounting points for the body and steering knuckle. The used ball joints and bushings (depending on the specific factory configuration) ensure a controlled range of motion, necessary for the proper operation of the suspension throughout its full deflection range.

The component is designed as part of the load-bearing system, therefore it is recommended to perform a wheel alignment after installation. This allows for fully utilizing the stable handling and reducing uneven tire wear. A correctly selected and installed control arm minimizes knocking, play, and uncertain vehicle behavior on uneven surfaces.

Benefits of using an original Audi control arm

Choosing a component from the Wishbones and ball joints group dedicated to the Audi A4 B6 means maintaining the factory suspension performance parameters. The appropriate arm geometry, properly selected stiffness, and ball joint characteristics translate into:

• predictable vehicle behavior in corners,
• better vehicle control at higher speeds,
• reduction of vibrations transmitted to the body and steering system,
• consistency with other factory suspension components.

As a used part, the control arm represents a reasonable compromise between repair costs and maintaining the manufacturer's original specifications, without the need for modifications or adaptations.

Used condition and practical maintenance tips

The component in used condition allows for an economical suspension repair while maintaining a design consistent with Audi's engineering. Before installation, it is recommended to have the condition of the ball joint and bushings verified by a mechanic, and after installation – to check the geometry and perform a road test to evaluate the suspension's performance under load.

Replacing the left-side control arm is often combined with checking the right-side component to maintain suspension symmetry. A consistent condition on both sides of the front axle promotes even tire wear and stable vehicle handling.

Related suspension components and additional materials

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

To better understand the relationships between shock absorbers, control arms, and stabilizers, as well as the symptoms of wear for individual components, it is worth consulting our technical guide: Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers.

If you are considering a choice between a used part and an aftermarket replacement, our practical article explaining the advantages of original second-hand components may be helpful: 5 reasons why a used OEM part is a better choice than an aftermarket replacement.