Genuine OEM Audi Flush Valve Vent Hose, part number 8P0133781B. This precisely molded rubber hose is designed to allow for the controlled venting of gases from a flush valve, an essential function for maintaining correct system pressure and emissions compliance. It is a small, lightweight component, weighing 0.029 kg and measuring approximately 0.11 meters in length. Using a genuine OEM hose ensures the correct material composition, precise internal diameter, and exact molded shape for a leak-free connection and reliable long-term performance in the emissions system.