Genuine OEM Audi Breather Hose Coupler, part number 06D133299C. This component is designed to securely connect sections of the engine breather hose, maintaining the integrity of the crankcase ventilation system. Made from durable rubber or plastic, it ensures a tight seal for proper emission control and engine health. Using a genuine OEM coupler guarantees precise fitment and resistance to engine fluids and temperatures, preventing vacuum leaks and system malfunctions.