Genuine OEM Volkswagen Coolant Hose, part number 06K121497AS. This hose is a critical component of the engine's cooling system, designed to transport coolant between the engine and the radiator or other cooling components. It is constructed from high-quality, heat-resistant rubber and reinforced to withstand the pressures and temperatures of the cooling system. Proper routing and secure connections are essential for preventing leaks and maintaining optimal engine operating temperature. Genuine OEM ensures the correct diameter, length, and material composition for reliable and long-lasting service.