This NRF auxiliary water pump (part code 390118) is designed to enhance your vehicle's cooling system. It specifically manages the circulation of coolant, ensuring that your engine operates within its optimal temperature range. Proper coolant circulation is vital for preventing overheating, which can lead to significant engine damage. This pump works in conjunction with your main water pump to provide supplementary flow when needed, particularly during low engine speeds or when the heater is in use. NRF is a reputable brand known for its quality cooling system components. This auxiliary pump is built to meet stringent manufacturing standards, offering reliable performance and durability for your peace of mind.