Genuine OEM Volkswagen Engine Coolant Hose, part number 5WA122051AE. This hose is a critical component of the engine cooling system, responsible for circulating coolant between various components, including a heat exchanger, to maintain optimal engine operating temperatures. It features a specific routing geometry and is constructed from durable, heat-resistant rubber compounds. Weighing 0.1553 kg and measuring 0.415 m in length, using a genuine OEM hose ensures the correct material resistance to coolant chemicals and high temperatures, along with precise routing and connection points to prevent leaks and ensure reliable cooling performance.