Genuine OEM Audi Rear Lower Control Arm, part number 420505311D. This essential suspension component connects the wheel hub to the vehicle's chassis, enabling controlled vertical wheel movement and maintaining proper alignment. It is specifically designed for the rear lower left side of the vehicle's suspension system. Constructed from durable aluminum, this control arm weighs approximately 2.49 kg. Choosing a genuine OEM control arm ensures the correct geometry, material strength, and bushing quality, which are vital for maintaining precise steering, stable handling, and a comfortable ride.