Genuine OEM Audi Cooling Pipe Valve Insert, part number 3D0820855. This small but critical component is designed to regulate fluid flow within a cooling or HVAC system pipe, ensuring proper pressure and temperature management. It is inserted directly into the pipework to control the flow of refrigerant or coolant. Made from durable materials, this insert is lightweight, weighing approximately 0.001 kg, and measures about 2.6 cm in length. Using a genuine OEM valve insert guarantees precise calibration and material compatibility, which are essential for the efficient and reliable operation of the vehicle's climate control or engine cooling system.