Genuine OEM Audi Rear Shock Absorber Buffer, part number 1EA511351C. This component, also known as a bump stop, is designed to limit the upward travel of the shock absorber, preventing harsh bottoming out and protecting the suspension components from damage. It is positioned at the rear suspension assembly. Weighing 0.165 kg, this buffer is made from durable, resilient material. Using a genuine OEM shock absorber buffer ensures the correct material hardness and dimensions, which is critical for maintaining ride comfort and protecting the suspension system under extreme compression.