Genuine OEM Audi Recirculation Tube, part number 1K0145693B. This tube is designed to direct air or gases within a specific system for recirculation, playing a role in emissions control or intake air management. It is a shaped hose, weighing 0.4125 kg and measuring 0.47m in length. Choosing a genuine OEM recirculation tube ensures the correct routing geometry, resistance to temperature and pressure, and proper sealing to prevent leaks and maintain system efficiency.