Genuine OEM Audi Water Coolant Hose, part number 5WA121064A. This hose is designed to transport water and coolant within the engine's thermal management system, crucial for regulating engine temperature and preventing overheating. It is positioned as a component in the engine cooling circuit, connecting to critical components like the turbocharger and heat exchanger. Weighing 0.088 kg and measuring approximately 27.5 cm in length, it is engineered for specific routing and pressure. Choosing a genuine OEM hose ensures the correct material composition and precise routing geometry, preventing leaks and maintaining system integrity under thermal stress.