Sorry for the noob question

But the wires on this little sensor snapped off while I was changing out the thermostat. Is this a coolant temp sensor?
Pics attached

 

IIRC, it's the low coolant sensor. It'll activate the 'Add Coolant' light and sound a buzzer if the coolant falls below the sensor.

 

You're right. It's the low coolant level sensor. With it broken, the buzzer will turn on and stay on. If you make a little ground wire and plug it into where that went, it will turn the buzzer off. Reinstall that and order another one if you want. I deleted mine.

 

I’d get another one unless you happen to have an alarm on an aftermarket temperature gauge. The low coolant level alarm is about the only worthwhile thing on the stock temp gauge. And that sensor isn’t all that expensive.

 

An FC sensor is the same if you don't mind splicing on the FD pigtail