This NRF auxiliary water pump (part code 390085) is designed to circulate coolant within your vehicle's cooling system. It plays a crucial role in maintaining the optimal operating temperature of your engine, especially during periods of low natural coolant flow, such as when the heater is in use or the engine is idling. Proper functioning of the auxiliary water pump is essential for preventing overheating and ensuring the longevity of your engine components. This unit is built to meet the demanding requirements of modern vehicles, providing reliable performance and consistent coolant circulation. Installation of this NRF pump will help maintain efficient heat transfer within the cooling system, contributing to a stable engine temperature and comfortable cabin heating.