Genuine OEM Volkswagen Lower Radiator Coolant Hose, part number 1EA121051N. This hose is responsible for carrying coolant to and from the lower section of the radiator, playing a vital role in maintaining optimal engine operating temperature. Weighing 0.3819 kg and measuring 0.665m in length, its specific routing, heat resistance, and pressure tolerance are crucial for preventing leaks and ensuring efficient engine cooling.