Genuine OEM Volkswagen Coolant Hose, part number 07Z121063D. This hose is a vital component of the engine's cooling system, designed to transport coolant between various parts such as the radiator, engine block, and heater core. It is specifically positioned within the engine bay to connect the auxiliary coolant pump to the engine. Constructed from high-quality, heat-resistant rubber, it is built to withstand the demanding conditions of the engine compartment. Genuine OEM coolant hoses are engineered for exact fitment and durability, ensuring they resist cracking, swelling, and premature failure under high temperatures and pressures.