Genuine OEM Audi Connecting Hose, part number 420131605E. This hose is a critical component for the air intake or emissions system, facilitating the flow of air or gases between different modules. It is located in the engine bay, connecting specific components as shown in the diagram. Constructed from durable rubber and reinforced plastic for longevity. Genuine OEM hoses are manufactured to precise specifications to ensure proper fitment and resistance to heat and pressure.