Audi A4 B9 Control Arm Lower Wishbone Rear Right O/S Suspension Rod 4M0505292D

Audi A4 B9 Control Arm Lower Wishbone Rear Right O/S Suspension Rod is a component from the Control arms and ball joints group, designed for operation in the rear right part of the suspension. Engineered as part of the wheel guidance system, it ensures stable axle handling, predictable vehicle behavior, and proper load transfer while driving. Thanks to its factory geometry, it is suitable for users expecting a precise fit to the Audi suspension design.

Specifications and technical data

• SKU: 4M0505292D
• Mark: Audi
• Condition: Used
• OEM Part Number: 4M0505292D
• Substitutable numbers: 4M0505292D, 4M0 505 292 D
• Location on the vehicle: Rear, Right
• Category: Control Arms, Ball Joints & Assemblies

Purpose and placement in the suspension

The presented control arm operates in the rear part of the vehicle on the right side, as a lower element of the suspension system. It is responsible for:

• maintaining proper wheel geometry in the longitudinal and transverse axes,
• stable body guidance during acceleration, braking, and cornering,
• transferring forces from the wheel hub to the body through flexible mounting points.

Such placement makes this part particularly important in cases of noticeable suspension play, vehicle pulling to the sides, or uneven tire wear.

Technical and functional characteristics

The rear right lower control arm in the Audi A4 B9 operates in the immediate vicinity of other suspension system components, such as other control arms, ball joints, or spring elements. The design of the rod is adapted for:

• precise positioning of the wheel hub relative to the body,
• cooperation with factory mounting points in the subframe and steering knuckle,
• operation under variable loads across the full range of suspension travel.

Thanks to the preservation of the original geometry, it is possible to achieve correct toe and wheel alignment values after installation, which translates into stable vehicle handling and predictable reactions to steering inputs.

Component condition and service application

The offered control arm is in used condition, making it an attractive solution for repairs where an optimal cost-to-functionality ratio is important. It can be used as a replacement in the event of:

• mechanical damage to the original control arm (bending, cracking, structural corrosion),
• excessive play in mounting points,
• the need to restore correct geometry after a collision or impact with a road obstacle.

Selecting a component from the same design group allows for maintaining suspension consistency and reduces the risk of improper fitment with other components.

Driving comfort and safety

A functional rear right lower control arm has a direct impact on:

• driving stability at higher speeds,
• vehicle reaction to transverse and longitudinal irregularities,
• even tire wear on the rear axle.

Replacing a worn component with a properly selected part from the Control arms and ball joints group helps reduce vibrations transmitted to the body and improves the predictability of the car's behavior in emergency situations. This is particularly important in vehicles operated on roads with poorer surface quality, where the suspension works under a wide range of loads.

Technical support and knowledge development regarding suspension

If you want to better understand how the suspension system works and what role control arms, shock absorbers, and stabilizers play in it, it is worth reaching for practical educational materials. Extended information on the diagnostics and operation of these components can be found in the article Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers, which discusses typical symptoms of wear and good service practices.

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 control arms, ball joints, or related rods, check the available parts in the Audi control arms and ball joints category.