Genuine OEM Audi Leak Detection Pump Hose, part number 4F0201946K. This hose connects to the leak detection pump, playing a vital role in the fuel system's ability to monitor for leaks and ensure emissions compliance. It is located within the fuel system assembly. Weighing 0.0905 kg and measuring 0.29 m in length, this hose is engineered for precise routing and chemical resistance. Using a genuine OEM hose ensures proper sealing, durability against fuel vapors, and accurate function of the leak detection system.