Audi A6 C6 Upper Wishbone Rear Left Right N/O/S Suspension 4F0505323K

Audi A6 C6 Upper Rear Control Arm Left Right is a component from the Control Arms and Ball Joints group, designed for the rear axle of the vehicle. Designed for installation on the left or right side at the rear, it ensures stable wheel guidance and precise suspension geometry maintenance. A used OEM component is a sensible choice for technical suspension repairs on an Audi when structural fit and predictable vehicle behavior are important.

Specifications and technical data

• SKU: 4F0505323K
• Mark: Audi
• Condition: Used
• OEM Part Number: 4F0505323K
• Substitutable numbers: 4F0505323K, 4F0 505 323 K
• Location on the vehicle: Rear, Right, Left
• Category: Control Arms, Ball Joints & Assemblies

Function and Role of the Rear Upper Control Arm

The rear upper control arm in the Audi A6 C6 is responsible for guiding the wheel along the correct trajectory and maintaining stable toe and camber. It transfers loads from the hub to the body, working in conjunction with other multi-link suspension elements. A correctly selected and functional control arm limits undesirable geometry changes during braking, acceleration, and when encountering uneven surfaces, which translates to predictable vehicle behavior.

The ability to install it on either the right or left side of the rear axle allows for flexible use of the part during suspension service – both for single-side replacement and for comprehensive servicing of the entire axle.

Intended Use and Vehicle Placement

The presented control arm is designed for operation at the rear of the vehicle, in the area of the suspension for the driven or trailing axle (depending on the specific configuration of the Audi A6 C6). Its placement on the vehicle includes:

• rear axle – operation in the suspension zone responsible for driving stability,
• left side – managing wheel geometry on the driver's side,
• right side – managing wheel geometry on the passenger's side.

This configuration allows the same type of control arm to be used on both sides, simplifying part selection and reducing the risk of ordering errors.

Benefits of Using an Original Audi Control Arm

Choosing a rear upper control arm specifically designed for the Audi A6 C6 offers a range of practical advantages in daily operation:

• Factory Fitment – maintains the correct position of mounting points on the body and at the steering knuckle, without the need for modifications.
• Consistent operation with other suspension components – compatibility with the standard multi-link system design.
• Stable vehicle handling – reduces play and uncontrolled wheel movements within the suspension's operating range.
• Improved tire wear control – correct geometry reduces the risk of uneven tread wear.

For users who expect predictable vehicle behavior after repair, using an original solution from the Control Arms and Ball Joints group is technically justified.

Part Condition and Service Application

The offered upper control arm is a used component, which in service practice often represents a favorable compromise between repair cost and maintaining the original suspension design. This type of component is suitable for:

• repairs after mechanical suspension damage,
• restoring correct geometry after a collision or impact with an obstacle,
• routine maintenance when excessive play or improper operation of the upper control arm has been identified.

After installation, wheel alignment is recommended to fully utilize the potential of the newly installed component and achieve stable vehicle handling.

More About Suspension and Related Components

To better plan service work and understand how control arms interact with other components, it is worth consulting a guide describing the construction and operation of the suspension. Practical tips for diagnostics and operation can be found in the article Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers, which discusses common problems and good service practices.

If you are planning a comprehensive repair or upgrade of the rear axle suspension area on 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.