Genuine OEM Audi A/C Refrigerant Line, part number 4M1816735F. This critical component is responsible for transporting refrigerant throughout the vehicle's air conditioning system. It ensures the efficient circulation of coolant for optimal cabin cooling. Measuring approximately 484mm in length and weighing 0.28 kg, this line is engineered to factory specifications, guaranteeing correct routing geometry and resistance to refrigerant pressures and temperatures for long-term reliability.