Genuine OEM Audi Intake Suction Pump Hose, part number 420133371A. This hose plays a vital role in the intake system by connecting the suction pump, which helps manage vacuum and air flow for various engine functions. Its specific curved geometry ensures correct routing and fitment within the engine bay. Made from durable, flexible rubber, it is designed to resist oil, heat, and vacuum pressure. Using a genuine OEM hose guarantees precise dimensions, material integrity, and secure connections, preventing vacuum leaks and maintaining optimal engine performance.