Genuine OEM Volkswagen Coil Spring Stop Buffer, part number 5R3511357Q. This stop buffer is designed for the rear suspension system to prevent the coil spring from over-compressing, protecting other suspension components and maintaining ride quality. It is positioned on the rear coil spring. Made from durable, resilient materials, it withstands repeated compression cycles. Genuine OEM coil spring buffers are essential for the longevity and proper functioning of the suspension system.