The small quarter windows in the back doors are the same on both sedans and wagons. Unfortunately, they are probably the most difficult piece of glass to change on the entire car. If you have to break into your own car, it's much better to break the large main window in the back door.

The others are correct about the procedure and the presence of a rivet that has to be drilled out. I have found that using lots of Windex helps free the glass from the rubber gasket, and would probably be equally helpful in getting it to go back together. (I've parted out a couple, but never put one in)