Genuine OEM Audi Coolant Line, part number 8W0121081CC. This hose is an integral part of the engine cooling system, responsible for transporting coolant to maintain optimal engine operating temperatures. It is positioned within the engine bay, connecting various components of the cooling circuit, including the expansion tank. Constructed from durable, heat-resistant rubber or plastic, it measures approximately 24 cm long. Choosing a genuine OEM coolant line ensures proper fluid transfer, resistance to high temperatures and pressures, and a precise fit to prevent leaks and maintain cooling system efficiency.