Genuine OEM Audi Fuel System Breather Line, part number 8R0201997S. This essential line facilitates the ventilation of the fuel system, preventing pressure buildup and ensuring the proper function of the evaporative emissions system. It is located within the fuel tank and associated components. Measuring approximately 0.72 meters in length and weighing 0.09 kg, this line is designed for specific routing. Genuine OEM breather lines provide the correct material composition and precise routing geometry for effective fuel system ventilation and long-term emissions compliance.