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For folks who don't want to watch a video to find the correct sensor...

The target sensor is in the coolant manifold. Follow the TOP radiator hose back to the engine. It connects to the coolant manifold, front (towards front of the car) of the two large hoses at the engine. A couple inches to your left (towards the right passenger side of the car) from the hose clamp on that aluminum manifold is the target engine coolant temp sensor. The connector faces up on the top of the sensor, has a release tab that, when depressed, will allow the connector to slide off the sensor. Do Not Pull on the wires.

The space at the sensor is a little cramped for large fingers. I have radio-announcer's hands and still found it a bit tight. I ended up using a long forceps to pinch the little release tab and remove the connector. A long needle-nose pliers might do the same duty, just be gentle so you don't crush the plastic connector. Especially as the cars age, the plastic connectors can get a little brittle from engine heat, so use appropriate caution.

Do this with the engine completely cold, and you'll avoid burned fingers and a possible MIL check-engine light on start-up.
 
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