Audi A4 B8 A5 8F Q5 8R Front Control Arm Lower Wishbone Left N/S 8K0407155C

Audi A4 B8 A5 8F Q5 8R Lower Left Control Arm is a component from the Control Arms and Ball Joints group, designed for the front suspension on the driver's side. Engineered for Audi mid-size and SUV models, it ensures stable handling, precise geometry maintenance, and predictable vehicle behavior during braking and cornering.

Specifications and technical data

• SKU: 8K0407151F
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0407151F
• Substitutable numbers: 8K0407151F, 8K0 407 151 F, 8K0407155C, 8K0 407 155 C
• Location on the vehicle: Front, Left
• Category: Control Arms, Ball Joints & Assemblies

Purpose and Function in Suspension

The presented lower left control arm operates in the front axle of the vehicle, responsible for guiding the wheel relative to the body and maintaining the correct position of the hub with respect to the shock absorber and steering knuckle. Its placement in the front – left side area directly influences the driving path, steering system response, and even tire wear.

The control arm is part of the multi-link suspension system used by Audi, where the precision of ball joints and bushings is crucial for ride comfort, vibration damping, and stability at higher speeds.

Compatibility with Audi Models

The Audi A4 B8 A5 8F Q5 8R Lower Left Control Arm has been developed for platforms used in popular premium segment models. This allows it to be used in both mid-size cars (A4, A5) and the Q5 SUV, maintaining appropriate stiffness and suspension performance characteristics.

The selection of the correct control arm for a specific engine and body version should always consider the manufacturer's catalog data and part technical designations. The product has assigned catalog numbers and replacement numbers, which facilitate verification of compatibility with a specific vehicle instance.

Technical Characteristics and Installation

The control arm belongs to the group of load-bearing suspension elements, working in conjunction with ball joints and other components from the Control Arms and Ball Joints category. The appropriately designed arm shape and mounting points allow for the maintenance of factory suspension geometry, which translates to predictable handling and correct operation of safety systems (ABS, ESP).

Its installation on the front axle on the left side requires precise fitting, adhering to the torque specifications recommended by the vehicle manufacturer. After replacement, it is recommended to perform a wheel alignment and geometry adjustment to fully utilize the potential of the newly installed component.

Part Condition and Benefits of Use

The offered control arm is a used part, allowing for an economical suspension repair while maintaining the original structural specifications. Compared to low-quality aftermarket replacements, using a component from the same technological line as the factory equipment promotes consistent performance parameters for the entire system.

Replacing a worn control arm with a functional component from this group can reduce unwanted noises, improve steering precision, and decrease the risk of uneven tire wear. This is particularly important in Audi A4, A5, and Q5 vehicles, where ride comfort and stability are significant aspects of daily use.

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 elements, check the available parts in the Audi Control Arms and Ball Joints category.

Technical Support and Suspension Knowledge

To better understand the role of control arms in the operation of the entire drivetrain and to plan servicing correctly, it is worth consulting technical materials discussing the interaction of shock absorbers, control arms, and stabilizers. Practical tips on diagnostics, signs of wear, and part selection principles can be found in the article Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers.