Genuine OEM Audi Fuel Tank Breather Line, part number 4M0201995T. This essential component manages the ventilation of fuel vapors from the fuel tank, preventing excessive pressure or vacuum buildup and playing a crucial role in the vehicle's evaporative emissions (EVAP) system. It is positioned underneath the vehicle, connecting to the fuel tank assembly. Constructed from durable, fuel-resistant materials, this line is designed to safely transport fuel vapors. Choosing a genuine OEM breather line ensures the correct material composition, precise routing, and secure connections, which are vital for maintaining emissions compliance and preventing fuel system issues.