Genuine OEM Audi Coolant Line Shock Valve, part number 4M0816805B. This valve is designed to regulate the flow of coolant within the vehicle's thermal management system, preventing pressure shocks and ensuring stable operation. It is integrated directly into the coolant line assembly. Weighing 0.119 kg and measuring approximately 52mm in length, this component is engineered for precise fitment. Choosing a genuine OEM valve ensures correct flow characteristics and material compatibility, critical for the longevity and efficiency of the entire cooling system.