Check the listing for details. Engine Coolant Thermostat Replacement fit for Honda FIT 2015-2020. Condition: New. Listed at 15.43 USD. Feature:The engine coolant thermostat controls the flow of coolant through the radiator to enable the engine to reach and maintain its normal operating temperature. The water inlet housing connects the radiator hoses to the thermostat.A sensor inside the thermostat will cause it to open to allowing coolant to flow to and from the radiator if the engine reaches to a certain temperature, to decrease the temperature, and ensure it be recirculated through the engine. By repeating such a cycle to keep your car engine running under optimum temperature.This is a non-OEM product, accessory only!Function:Withstand extreme changes in temperature.Redesigned full aluminum construction.Solid quality materials for strong stability and long lasting durability, avoid cracks on tube or gasket.