This NRF auxiliary water pump (part code 390086) is designed to maintain proper coolant circulation within your vehicle's engine. It plays a crucial role in the overall cooling system, ensuring that the engine operates within its optimal temperature range. Proper functioning of the auxiliary water pump is essential for preventing engine overheating, especially during low engine speeds or when the main water pump may not be providing sufficient flow. This component helps to distribute coolant effectively throughout the engine block and radiator, contributing to the longevity and performance of your engine. NRF is a reputable brand known for its quality cooling system components. This pump is built to meet or exceed original equipment specifications, offering a reliable solution for your vehicle's cooling needs.