Genuine OEM Audi Engine Coolant Hose, part number 4G0121448AQ. This hose carries coolant to regulate engine and transmission temperature, playing a vital role in the vehicle's thermal management system. Positioned within the transmission cooling circuit, it ensures efficient heat exchange. Weighing 0.075 kg and measuring 0.219 m in length, its specific bends and durable material are crucial for maintaining proper fluid flow and preventing leaks under varying operating conditions.