Where is the thermostat located on a 1996 Mazda 626 2.5 liter engine?

The thermostat on a 1996 Mazda 626 with a 2.5L engine is located at the rear of the engine, on the lower intake manifold. It's often somewhat difficult to access and requires removing some components for easier access. You'll likely need to consult a repair manual specific to your vehicle year and engine to get precise instructions and diagrams showing the location and removal process. A Haynes or Chilton manual would be a good resource.