Audi A4 B9 Rear Suspension Trailing Control Arm Right O/S 8W0501530D

Audi A4 B9 Rear Suspension Trailing 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 correct axle geometry, stable vehicle handling, and predictable behavior during braking and cornering.

Specifications and technical data

• SKU: 8W0501530D
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0501530D
• Substitutable numbers: 8W0501530D, 8W0 501 530 D
• Location on the vehicle: Rear, Right
• Category: Control Arms, Ball Joints & Assemblies

Purpose and function in the suspension

The rear right axle control arm in the Audi A4 B9 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. A properly selected component limits unwanted wheel movement, which translates into driving stability, even tire wear, and predictable vehicle reactions on uneven surfaces.

Thanks to its dedicated placement in the rear right zone, the control arm works with other suspension components to create a cohesive system responsible for comfort, traction, and safety. The appropriate structural rigidity helps maintain suspension geometry even during dynamic driving.

Benefits of using an original Audi control arm

The original control arm designed for Audi has been developed for a specific platform, which ensures:

• precise fitment to the mounting points on the body and steering knuckle,
• preservation of factory suspension geometry parameters,
• consistent cooperation with stock shock absorbers, springs, and the stabilizer bar,
• appropriate operating characteristics of bushings and ball joints.

Such a fit reduces the risk of incorrect wheel alignment, squeaking, or play, and also facilitates subsequent toe-in adjustment after installation. Using components from the Control arms and ball joints group that comply with the manufacturer's design is particularly important in modern multi-link constructions.

Installation and operational characteristics

The control arm intended for the rear right side of the vehicle is prepared for operation in demanding road conditions, taking into account vertical, lateral, and longitudinal loads. The design provides for cooperation with factory mounting points, which facilitates installation in workshop conditions and allows for the preservation of factory force paths in the suspension.

After correct installation and geometry adjustment, you can expect:

• more stable rear axle handling at higher speeds,
• reduction of the "wandering" effect of the vehicle's rear,
• better control over the car during emergency braking and obstacle avoidance.

The element comes from the used parts segment, which allows for economical suspension repair while maintaining the original design and operating characteristics.

Application in service practice

Replacing the rear right control arm is recommended in the case of play in joints, mechanical damage, corrosion, or uneven tire wear resulting from incorrect geometry. Selecting the right component for Audi minimizes the risk of installation problems and accelerated wear of other suspension elements.

Due to the importance of this subassembly for driving safety, it is recommended to perform a measurement and adjustment of the rear axle geometry after every replacement. A properly selected control arm makes it easier to achieve values consistent with the manufacturer's documentation, which translates into predictable car behavior in daily use.

Related components and technical knowledge

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

To better understand the relationships between shock absorbers, control arms, and stabilizers, as well as the impact of these subassemblies on safety and driving comfort, it is worth checking out our guide: Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers. This will help you plan the scope of service work and select the appropriate components for your car.