Genuine OEM Volkswagen Coolant Hose, part number 7P0121101A. This essential hose is part of the engine cooling system, responsible for circulating coolant to and from heat exchangers to maintain optimal engine operating temperatures. It measures approximately 0.265 meters in length and weighs 0.096 kg. Using genuine OEM hoses ensures the correct routing geometry, material composition, and resistance to temperature and pressure fluctuations, which are critical for preventing leaks and maintaining efficient engine cooling.