Audi A4 B7 Rear Wishbone Lower Control Arm Right O/S 8E0505312AF

Audi A4 B7 Rear Wishbone Lower Control Arm Right O/S is a component from the Control arms and ball joints group, designed for the rear right side of the suspension. Engineered as an original Audi part, it ensures proper axle geometry, stable vehicle handling, and predictable behavior during braking and cornering. It is a practical solution for users who want to restore proper suspension performance without compromising the factory handling characteristics.

Specifications and technical data

• SKU: 8E0505312AF
• Mark: Audi
• Condition: Used
• OEM Part Number: 8E0505312AF
• Substitutable numbers: 8E0505312AF, 8E0 505 312 AF
• Location on the vehicle: Rear, Right
• Category: Control Arms, Ball Joints & Assemblies

Purpose and function in the suspension

The rear lower control arm is responsible for the precise guidance of the wheel relative to the body, maintaining the specified toe-in, and controlling the operation of the spring and shock absorber. In the version mounted on the rear right side, it operates within a multi-link system, transferring vertical and lateral loads that occur during acceleration, braking, and driving over uneven surfaces.

A worn or damaged control arm can cause irregular tire wear, reduced stability at higher speeds, and uncertain vehicle behavior on uneven surfaces. Replacing it with an original component from the same design group allows for the restoration of factory handling parameters, which translates into safer and more predictable vehicle behavior.

Construction and operating characteristics

The rear lower control arm in the Audi A4 B7 works with ball joints and metal-rubber bushings that dampen vibrations and compensate for suspension movements. The appropriately selected structural rigidity provides a balance between comfort and handling precision, which is characteristic of Audi suspensions of this generation.

The geometry of the control arm has been developed to maintain stable tire contact with the road surface across a wide range of loads. As a result, the suspension system reacts better to changes in direction, and assistance systems (ABS, ESP) can operate under optimal conditions. Using an original solution allows for maintaining the consistency of the entire multi-link system, which is particularly important during intensive vehicle use.

Vehicle placement and installation

The presented control arm is intended for installation in the rear right part of the vehicle. Correct placement on the vehicle is crucial for maintaining proper suspension geometry; therefore, during installation, attention should be paid to the orientation of the component and the correct tightening of bolted connections while the suspension is under load.

Replacing the control arm usually requires removing the wheel, disconnecting the ball joints and bushings from the steering knuckle and the suspension subframe, and then reassembling while adhering to the tightening torques recommended by the manufacturer. After completing the work, it is recommended to perform a wheel alignment to fully utilize the potential of the newly installed component and avoid uneven tire wear.

Condition and practical application

The component comes from disassembly and is offered as a used part, which allows for an economical suspension repair while maintaining the original design. This is a good solution for drivers who want to reduce service costs while still using components consistent with the manufacturer's factory specifications.

Choosing a used control arm is particularly important for cars used daily, where a reasonable balance between price and functionality counts. An appropriately selected element from this group allows for restoring the proper operation of the rear axle, reducing unwanted play, and improving ride comfort, especially on roads with poorer surface quality.

Related suspension components and additional information

During work on the rear axle, it is worth paying attention to the condition of other components from the Control arms and ball joints group, such as other control arms, ball joints, or metal-rubber bushings. Simultaneous inspection of several elements helps avoid repeated service visits and ensures consistent performance of the entire suspension system.

To better understand the role of control arms in vehicle construction and the relationships between them and shock absorbers and stabilizers, it is worth checking out our guide: Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers. There, you will find practical tips regarding diagnostics and suspension maintenance in various car models.

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

For drivers interested in using used components for a wider range of repairs or car modifications, a guide dedicated to economical upgrades may also be useful: Audi on second-hand parts – tuning and repairs without losing quality. It allows for better planning of service work and choosing components in an informed manner that is tailored to your driving style.