1. Open the hood of your Mazda Miata.
2. Locate the engine block, which is the main part of the engine where the pistons and other moving parts are located.
3. The engine coolant temperature sensor is usually located near the top of the engine block, towards the front of the vehicle.
4. It is typically a small, cylindrical sensor with a wire connector attached to it.
5. It may also be labeled with the letters "ECT" or "CTS."
If you are still having trouble finding the engine coolant temperature sensor, you can refer to your Miata's owner's manual or a repair manual for more detailed instructions.