This NRF auxiliary water pump (part code 390023) is designed to circulate coolant within your vehicle's engine, ensuring efficient heat dissipation. Proper functioning of the auxiliary pump is crucial for maintaining the optimal operating temperature of the engine, especially during periods of low natural coolant flow, such as when the heater is in use or the engine is idling. NRF is a reputable brand known for its quality cooling system components. This pump is built to meet or exceed original equipment specifications, providing reliable performance and longevity.