Genuine OEM Audi fuel tank vent hose, part number 427201384B. This hose is a critical component of the fuel system, responsible for the safe and efficient routing of fuel vapors. It is located within the fuel system assembly as indicated in the technical diagram. This part is manufactured to exact factory specifications for material durability and chemical resistance. Choosing genuine OEM ensures the correct routing geometry and material integrity required to maintain a sealed, leak-free fuel system.