This NRF thermostat is designed to maintain your engine's optimal operating temperature. By controlling the flow of coolant, it prevents overheating and ensures efficient engine performance. Proper functioning of the thermostat is crucial for fuel efficiency and reducing emissions. A faulty thermostat can lead to either an engine running too cold or too hot, both of which can cause significant damage over time. NRF is a trusted brand in cooling system components, providing reliable parts that meet or exceed original equipment specifications. This thermostat is built for durability and consistent performance.