Buy OEM Audi Part # 4F0407151A (4F0-407-151-A, 4F0407151). Suspension Control Arm (Lower). A6, S6. Suspension Control Arm - Repair or Replace Control arms often don’t fail on their own, although

Arm. Control. CONTOUR. Ft cntl. Suspension.
From Chassis/VIN 4F-8-055 501. Incl.Ball Joint & Bushings. Suspension component that connects and provides pivotal movement of the Steering Knuckle to the vehicle. To Chassis/VIN 4F-8-055 500.

Suspension Control Arm

Fits A6, S6

A6, S6.
Suspension Control Arm - Repair or Replace
Control arms often don’t fail on their own, although their associated bushings can break or wear causing a clunk noise when your Audi goes over bumps or changes speed rapidly—whether braking or under hard acceleration. Control arms can also sometimes become bent, causing your vehicle to pull to the left or right.