Genuine OEM Audi Secondary Air Pump Connecting Hose, part number 1K0131149C. This corrugated hose forms a vital connection between the secondary air pump and the emissions system, facilitating the injection of fresh air into the exhaust stream to aid in catalytic converter operation. Its specific bends and durable material are designed to withstand engine bay conditions. Measuring approximately 220mm in length, using a genuine OEM hose ensures the correct material flexibility, heat resistance, and precise end connections, which are critical for maintaining the integrity and efficiency of the vehicle's emissions control system.