This NRF auxiliary water pump (part code 390074) is designed to circulate coolant within your vehicle's engine. It plays a crucial role in maintaining the optimal operating temperature, preventing overheating and ensuring the longevity of engine components. Proper functioning of the auxiliary water pump is essential for the efficiency of your vehicle's cooling system. It complements the main water pump by providing additional circulation, especially when the engine is at lower speeds or idle, ensuring that heat is dissipated effectively. NRF is a reputable brand known for its quality cooling system components. This pump is built to meet or exceed original equipment specifications, offering reliable performance and durability for your peace of mind.