Audi Q5 8R Suspension Control Arm Lower Wheel Hub Rear Right O/S 8R0505312B

Audi Q5 8R Suspension Control Arm Lower Wheel Hub Rear Right O/S is a component from the Longitudinal body frame parts and brackets group, designed for operation on the rear axle on the right side. This is a used, original Audi component, ensuring proper wheel guidance, body stability, and predictable vehicle behavior in daily operation.

Specifications and technical data

• SKU: 8R0505312B
• Mark: Audi
• Condition: Used
• OEM Part Number: 8R0505312B
• Substitutable numbers: 8R0505312B, 8R0 505 312 B
• Location on the vehicle: Rear, Right
• Part type: Subframe
• Category: Frame Rails & Subframes

Purpose and function in the Audi Q5 8R suspension

This lower rear suspension control arm is responsible for precisely maintaining wheel geometry on the right side of the rear axle. As a structural element operating within a multi-link system, it transfers loads between the wheel hub and the body structure, influencing:

• driving stability during acceleration and braking,
• control over body roll in corners,
• even tire wear by maintaining correct toe and camber,
• overall ride comfort by reducing unwanted play in the suspension. A properly selected and functional control arm in this position is crucial for maintaining the factory handling parameters of the Audi Q5 8R, especially in vehicles operated under load or on lower-quality road surfaces.

Construction and body fitment

The control arm is designed as a component that works directly with the wheel hub and mounting points in the rear part of the body. Its geometry is strictly matched to the Audi Q5 8R platform, which allows for:

• maintaining the correct wheel position relative to the body,
• proper interaction with other control arms and subframe elements,
• effective transfer of longitudinal and lateral forces without overloading other components. Thanks to a design consistent with factory solutions, installation is predictable for an experienced mechanic, and after replacement, it is possible to precisely set the rear axle geometry.

Benefits of using an original used component

Choosing a used, original rear control arm for an Audi allows you to combine cost control with maintaining compliance with the factory suspension design. In practice, this means:

• maintaining the suspension operating characteristics intended by the manufacturer,
• reliable fitment to mounting points on the body and at the wheel,
• the ability to restore proper vehicle handling after a collision, corrosion, or wear of the previous component. When replacing this type of component, it is recommended to perform a geometry measurement and adjustment to fully utilize the potential of the newly installed control arm and avoid uneven tire wear.

Application in service practice

The lower control arm for the rear right wheel is particularly important in cases of:

• post-accident repairs within the rear right suspension area,
• mechanical damage after hitting an obstacle or curb,
• excessive play detected during a periodic inspection,
• problems with maintaining rear axle geometry despite previous adjustments. Using this component allows for restoring the correct interaction between the wheel and the body, which translates into more predictable vehicle behavior and better control over the car in daily use. If you are planning a comprehensive repair or upgrade of the rear suspension zone in your Audi and need other elements from the same group, such as additional control arms, brackets, or longitudinal mounting elements, check the available parts in the Longitudinal body frame parts and brackets Audi category. To make an informed decision between an original part, a replacement, or a used part and to better understand the differences in costs, quality, and fitment by OEM number, it is worth reading the article Original, replacement, or used – which car parts are the most cost-effective?.