Parts for your 2008 Mazda Cx-9-Thermostat

2008 Mazda CX-9 Thermostat — What it does and when to replace it

Yes, the 2008 Mazda CX-9 absolutely uses a thermostat. Technical sources including the Mazda Workshop Manual for the CX-9 (Cooling System section), the Mazda Electronic Parts Catalogue, and major aftermarket catalogues (Gates, Stant, MotoRad) all list a replaceable thermostat/thermostat housing for the 3.7L V6 engine used in this model year. It’s a standard wax-pellet unit housed at the front of the engine, controlling coolant flow to keep the V6 right on song.

The thermostat’s job is to help the engine warm up quickly, then hold a stable operating temperature for performance, fuel economy and long engine life. When the engine’s cold, it stays shut so the coolant loops internally and warms up faster. Once it’s up to temp, it opens to the radiator to shed heat. If the thermostat sticks shut, the CX-9 can overheat