This FAE coolant temperature sensor, part number 31140, is designed to accurately measure the temperature of your vehicle's engine coolant. Accurate coolant temperature readings are crucial for the proper functioning of your engine. The engine control unit (ECU) uses this information to adjust fuel injection, ignition timing, and cooling fan operation. A faulty sensor can lead to poor fuel economy, rough idling, engine overheating, or even engine damage. FAE is a reputable manufacturer known for producing reliable automotive components. This sensor is built to meet or exceed original equipment specifications, ensuring a proper fit and dependable performance. It is an essential part for maintaining your vehicle's cooling system and overall engine health.