Genuine OEM Audi Fuel Supply Hose, part number 8K0131911C. This hose is designed to supply fuel for the reducing agent system. It is located in the fuel system assembly, as indicated by number 23 in the diagram. This part is constructed from durable materials to withstand fuel system pressures and temperatures. Genuine OEM parts ensure exact fitment and material integrity, crucial for the safe and efficient operation of the fuel system.