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Glad you asked, I'm having A/C problems myself and I had to find where this thing is as well. It is behind and underneath the glove compartment. You'll have to unscrew the screws holding the glove compartment shell and with something flat like a butterknife, pop off the arms that hold the glove compartment door from falling. Then you pull out the glove compartment shell but you may have to find a way of getting it past the glove compartment catch or hook. Once out, it is on the left back side as you are looking at the glove compartment. The glove compartment is about a foot wide so using that measure it would be about three to four inches over from the left and towards the back plugged in downward. You'll see the top of it and it should either have a blue or green shell with I think five prongs. You'll know it when you see it because it's the only one like it in this area. Have fun!