Audi Q5 FY A6 C8 A7 4K A8 D5 Rear Control Arm Wishbone Right O/S 4N0505398A

The Audi rear right control arm from the Control Arms & Ball Joints group is an original suspension component designed for premium Audi models such as the latest generation Q5, A6, A7, or A8. This solution is engineered for stable handling, precise rear axle geometry, and safe load transfer in everyday use.

Specifications and technical data

• SKU: 4N0505398A
• Mark: Audi
• Condition: Used
• OEM Part Number: 4N0505398A
• Substitutable numbers: 4N0505398A, 4N0 505 398 A
• Location on the vehicle: Rear, Right
• Part type: Control Arm & Ball Joint Assembly
• Category: Control Arms, Ball Joints & Assemblies

Purpose and Function in Suspension

The presented rear right control arm operates in the rear axle area, responsible for maintaining the correct wheel position relative to the body and for stable vehicle handling during acceleration, braking, and cornering. As a component from the Control Arms & Ball Joints category, it works with other suspension components, ensuring:

• control of rear axle wheel geometry,
• proper transfer of lateral and longitudinal forces,
• increased straight-line stability at higher speeds,
• more predictable vehicle behavior over uneven surfaces.

Compatibility with Audi Models

The control arm is specifically designed for selected Audi models, including modern premium segment constructions such as the Audi Q5 FY generation, A6 C8 generation, A7 4K series, and A8 D5 generation. The placement on the vehicle, identified as rear – right side, clearly defines its position in the suspension system and reduces the risk of errors when selecting parts.

Technical Characteristics and Installation

As an original part, the control arm is structurally matched to the factory mounting points on the body and the steering knuckle, which facilitates installation and maintains the system's designed rigidity. Using the correct control arm on the right side of the rear axle helps to:

• maintain factory wheel alignment settings (toe and camber),
• minimize tire wear resulting from incorrect geometry,
• reduce unwanted play and knocking in the suspension,
• preserve acoustic comfort inside the vehicle.

The product has a dedicated OEM part number and interchangeable numbers, which simplifies compatibility verification with specific engine versions and model years in service catalogs.

Part Condition and Benefits of Choosing Original

The offered control arm is marked as used, allowing for an attractive purchase price while maintaining the original manufacturer's specifications. Choosing an original Audi suspension component from the aftermarket often provides a better fit than unknown origin replacements, while also reducing repair costs.

For users who expect consistent vehicle behavior after repair, using an original rear right control arm helps maintain the handling characteristics intended by Audi engineers, which is important for both daily city driving and highway journeys.

If you are planning a comprehensive repair or upgrade of the 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 & Ball Joints category.

Technical Support and Part Selection

To better understand the role of control arms in suspension operation and the symptoms of their wear, it is advisable to consult specialized technical materials. Practical tips for diagnosing and operating components such as shock absorbers, control arms, and stabilizers can be found in the article Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers, which helps in consciously planning repairs and selecting appropriate components for a specific model.