The recievers are in each front wheel well behind the liner, near the pinch weld, and one in the back near the frame next to the spare tire.

I would recommend not replacing the sensors right now. Chrysler susperseded the old part numbers and the new ones have a tendency to cause issues with our systems. I actually had to use my superchips programmer to disable my TPMS to get rid of the errors.... I'll enable it when Chrysler releases a fix (I'm guessing software update.)