Genuine OEM Audi Air Hose with Emission Test Valve, part number 06M133240AN. This hose is an integral part of the engine's air and emission control system, designed to transport air and facilitate emission testing. It is typically located near the turbocharger assembly in the engine bay. Measuring approximately 145mm in length, this hose is engineered for specific routing and pressure requirements. Using genuine OEM hoses ensures proper sealing, resistance to engine fluids, and accurate function of the integrated emission test valve.