Genuine OEM Audi A/C Refrigerant Line, part number 4M0816721BA. This essential component is responsible for transporting high-pressure or low-pressure refrigerant between various parts of the vehicle's air conditioning system, such as the compressor, condenser, and evaporator. It ensures the efficient circulation of refrigerant, which is vital for effective cooling and climate control. Weighing 0.303 kg and measuring approximately 0.63m in length, a genuine OEM refrigerant line guarantees correct routing geometry, precise fitting connections, and resistance to high pressures and temperatures for leak-free and reliable A/C system operation.