Genuine OEM Volkswagen Coolant Hose, part number 7M3122073BB. This hose is an essential part of the engine cooling system, responsible for transporting hot and cold coolant between various engine components like the radiator, engine block, and heater core. It is routed within the engine bay to ensure efficient heat exchange. Weighing 0.664 kg, this hose is constructed from durable, heat-resistant rubber compounds. Using a genuine OEM coolant hose ensures the correct material specifications, precise routing geometry, and proper resistance to temperature and pressure fluctuations for reliable engine cooling.