Genuine OEM Volkswagen Coolant Hose, part number 5QE819337F. This hose is part of the vehicle's heating and cooling system, responsible for circulating coolant to the cabin heater core. It ensures efficient climate control by transferring heat. Constructed from high-quality, heat-resistant rubber, it is designed to withstand high temperatures and pressures. Genuine OEM parts provide the exact fit and material composition required for optimal performance and longevity of the heating system.