This NRF auxiliary water pump (part code 390015) is designed to assist in the circulation of coolant within your vehicle's engine. It plays a crucial role in maintaining the correct operating temperature, especially during periods of low engine speed or when the main water pump may not provide sufficient flow. Proper functioning of the auxiliary pump is vital for preventing overheating and ensuring the longevity of your engine components. It helps to distribute coolant effectively throughout the cooling system, including the heater core for cabin comfort. NRF is a reputable brand known for its quality cooling system components. This pump is engineered to meet or exceed original equipment specifications, providing a reliable solution for your vehicle's cooling needs.