Genuine OEM Volkswagen Engine Coolant Hose, part number 2Q0121109C. This hose is a vital component of the engine cooling system, responsible for circulating coolant to regulate engine temperature. It connects to the coolant expansion tank and other cooling system parts, ensuring efficient heat transfer. Weighing approximately 0.068 kg, this hose measures 0.19m in length. A genuine OEM coolant hose guarantees the correct material composition for heat and pressure resistance, precise routing, and proper connection points, which are crucial for preventing leaks and maintaining engine health.