Audi A4 B6 Rear Wishbone Lower Control Arm Right O/S 8E0505312AC

Audi A4 B6 Rear Wishbone Lower Control Arm Right O/S is a component from the Control arms and ball joints group, designed for operation on the rear axle on the passenger side. It is responsible for precise wheel guidance, driving stability, and correct suspension geometry, which directly affects safety and the predictable behavior of the car on the road. A used original Audi part is a sensible choice for suspension maintenance when you care about factory fitment and solid construction.

Specifications and technical data

• SKU: 8E0505312AC
• Mark: Audi
• Condition: Used
• OEM Part Number: 8E0505312AC
• Substitutable numbers: 8E0505312AC, 8E0 505 312 AC, 8E0 260 403 D, 8E0260403D
• Location on the vehicle: Rear, Right
• Category: Control Arms, Ball Joints & Assemblies

Purpose and function in the suspension

The lower rear wishbone on the right side of the Audi A4 B6 transfers loads between the body and the wheel hub, maintaining the correct position of the wheel relative to the body during acceleration, braking, and driving over bumps. Thanks to its rigid yet appropriately flexible design, the wishbone works with other suspension components, limiting unwanted changes in wheel alignment and camber. In practice, this translates into:

• more stable handling at higher speeds,
• even tire wear,
• better vehicle control during emergency maneuvers,
• reduced vibrations transmitted to the body.

Benefits of using an original Audi wishbone

The original wishbone from the Audi A4 B6 was designed specifically for the geometry and suspension characteristics of this model. As a result, it provides:

• factory fitment to the mounting points on the body and steering knuckle,
• consistent cooperation with other system elements, such as shock absorbers or springs,
• appropriate stiffness and material durability selected for the vehicle's weight and load distribution. Choosing a used, original element from this group allows you to maintain the handling characteristics intended by the manufacturer, which is particularly important in cars driven dynamically or over longer distances.

Vehicle placement and installation aspects

The presented wishbone operates on the rear axle on the right side of the vehicle, which is important when selecting parts for a specific suspension configuration. Correct placement on the vehicle makes it easier for the mechanic to identify the component during inspection or repair and minimizes the risk of error when ordering. During installation, it is crucial to:

• use the appropriate tightening torques for the mounting bolts,
• check the condition of the cooperating bushings and ball joints,
• perform a wheel alignment after replacement to fully utilize the potential of the newly installed wishbone.

Condition and service application

The item is in used condition, which makes it an attractive solution for a budget-friendly but conscious suspension repair. It works well both as a replacement for a worn wishbone and as a part used during the staged regeneration of the rear axle when other system components are being replaced. In practice, such a wishbone is worth considering when symptoms typical of worn steering components appear, such as unstable handling, vehicle pulling, knocking from the rear suspension, or uneven tire wear.

Suspension service expansion and educational materials

If you are planning a comprehensive repair or upgrade of the suspension area in your Audi and need other elements from the same group, such as additional wishbones, ball joints, or related steering components, check the available parts in the Audi control arms and ball joints category. To better understand the relationships between individual suspension components and the symptoms of their wear, it is worth consulting a technical guide. Practical tips on operation and diagnostics can be found in the article "Suspension system – a comprehensive guide to shock absorbers, wishbones, and stabilizers", which helps you consciously plan service work and select the right spare parts.