Genuine OEM Volkswagen Engine Coolant Hose, part number 03L121049K. This hose is a critical component in the engine cooling system, designed to transport coolant between various engine components to maintain optimal operating temperature. It is typically found connecting parts of the radiator, engine block, or heater core. Constructed from durable, heat-resistant rubber, this hose measures approximately 0.26 meters in length. Choosing a genuine OEM coolant hose ensures precise fitment, correct routing geometry, and resistance to extreme temperatures and pressures for long-term reliability.