Genuine OEM Volkswagen Rear Coil Spring Base, part number 5R3511150D. This component serves as a stable and cushioned mounting point for the rear coil spring, ensuring proper seating and reducing noise and vibration. It is typically made from durable rubber or plastic. This circular base weighs approximately 0.225 kg. Using a genuine OEM coil spring base guarantees the correct material properties, dimensions, and resilience to effectively support the spring and contribute to overall suspension performance and longevity.