Genuine OEM Audi Coolant Hose, part number 5Q1820113B. This hose is a vital component of the engine cooling system, responsible for transporting coolant between various engine components to regulate temperature. It is designed with specific bends and connection points to ensure proper routing and fitment within the engine bay. Weighing approximately 1.521 kg, this hose is constructed from durable materials to withstand high temperatures and pressures. Choosing a genuine OEM coolant hose guarantees the correct material composition, precise routing geometry, and resistance to thermal cycling, preventing leaks and ensuring long-term cooling system integrity.