Genuine OEM Volkswagen Engine Coolant Hose, part number 5Q0122101DS. This hose is a vital component of the engine cooling system, responsible for circulating coolant between the engine, radiator, and other cooling system parts to regulate engine temperature. It is typically located within the engine bay, connecting various cooling components. Constructed from high-quality, heat-resistant rubber, it withstands high temperatures and pressures. Using a genuine OEM coolant hose ensures correct routing, precise fitment, and material durability for reliable engine cooling and leak prevention.