Genuine OEM Volkswagen Refrigerant Hose, part number 1K0820743FR. This hose facilitates refrigerant circulation within the vehicle's climate control system for optimal cooling. It is located at position 4 in the diagram. The hose is designed to handle the specific pressures and temperatures of the AC system. Genuine OEM hoses ensure the correct fit, material quality, and sealing necessary for reliable and efficient air conditioning performance.