Genuine VW/Audi Strut Bump Stop - 1J0412303 - A genuine VW/Audi strut bump stop is a rubber cushion designed to absorb shocks and reduce noise, vibration, and harshness. It helps to protect the suspension, steering, and other components from damage when the vehicle encounters bumps or potholes. This particular bump stop is designed for vehicles from the Volkswagen and Audi brands and is identified by the part number 1J0412303.