Genuine OEM Volkswagen Engine Coolant Hose, part number 4M0145909M. This hose is crucial for the engine cooling system, transporting coolant to and from the engine to maintain optimal operating temperatures. It is a curved hose, approximately 30.5 cm long, weighing about 0.13 kg. Using a genuine OEM coolant hose ensures the correct routing geometry, material composition, and resistance to temperature and pressure fluctuations, preventing leaks and maintaining cooling system integrity.