Genuine OEM Audi Rear Shock Stop Buffer, part number 5Q0511357AC. This crucial component is installed on the rear shock absorber to limit its travel and prevent harsh impacts, protecting the suspension system from damage and improving ride comfort. Weighing approximately 0.1309 kg, it is designed for durability. Using a genuine OEM buffer ensures the correct material composition and compression characteristics, which are essential for maintaining the intended suspension performance and preventing premature wear of other components.