Genuine OEM Audi Shock Absorber Bump Stop, part number 4F0512131. This component is designed to prevent the suspension from bottoming out, protecting the shock absorber and other chassis components from damage during extreme compression. It is typically installed on the shock absorber shaft. Weighing 0.11 kg and measuring approximately 0.135m in length, this genuine OEM bump stop provides the correct material and damping characteristics, which is crucial for maintaining ride comfort and preventing suspension damage.