Buy 2008 Audi S4 Suspension Control Arm (Rear, Upper). A4/S4, 4.2L. Cabriolet S4; REAR; Left. REAR Arms, Movement, Own - OEM Audi Part # 8E0407509Q (8E0-407-509-Q, 8E0407509E)

Cntl arm. Link. Suspension Control Arm.
From Chassis/VIN 8E-8-150 001. Incl.Ball Joint & Bushings. Suspension component that connects and provides pivotal movement of the Steering Knuckle to the vehicle. To Chassis/VIN 8E-8-150 000.

Suspension Control Arm

Fits RS4, S4

A4/S4, 4.2L. Cabriolet S4; REAR; Left. REAR; Left; S4, RS4. RS4. W/4.2 liter.
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 2008 Audi S4 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.