Genuine OEM Audi air intake drain hose, part number 4E0133647A. This hose is designed to facilitate the drainage of moisture or condensation from the air intake housing, preventing water accumulation in the intake system. It is positioned as shown in the air intake assembly diagram. Genuine OEM parts are essential for this component to ensure the correct material flexibility and resistance to engine bay temperatures, preventing cracking or leaks that could compromise intake system integrity.