This NRF auxiliary water pump, part code 390073, is specifically engineered to manage the circulation of cooling water within your vehicle's engine. Its primary function is to supplement the main water pump, ensuring consistent coolant flow, especially during low engine speeds or when the heating system is in use. This helps maintain the optimal operating temperature of the engine, preventing overheating and ensuring efficient performance. Crafted with quality materials, this pump is built for durability and reliable operation. Proper functioning of the auxiliary water pump is crucial for the overall health of your engine and the effectiveness of your vehicle's climate control system.