Genuine OEM Volkswagen Rear Coil Spring Stop Buffer, part number 5R3511357P. This buffer is designed to limit the compression travel of the rear coil spring, preventing harsh bottoming out and protecting suspension components. It is an integral part of the rear suspension assembly. Weighing 0.436 kg, this component is crucial for maintaining ride comfort and suspension longevity. Using a genuine OEM buffer ensures correct material properties and precise dimensions for optimal suspension performance.