Genuine OEM Volkswagen Coolant Hose, part number 07Z121063G. This hose is an integral part of the engine's cooling system, responsible for the circulation of coolant. It connects the thermostat housing to the auxiliary coolant pump. Fabricated from high-grade, heat-resistant rubber, this hose is engineered to endure the high temperatures and pressures found within the engine compartment. Genuine OEM coolant hoses are manufactured to exact specifications, ensuring a perfect fit and reliable performance, preventing leaks and maintaining optimal engine temperature.