I just had to replace the same thing on my 2012 2.5l. It was a pain in the ass. I went ahead and replaced the entire thing, not just the gasket. Apparently they are notorious for failing? Mine was leaking from the outlet. Took it off and noticed that the plastic itself had cracked and the gasket was also messed up. I got a new one from the local Ford dealership and put it on. had to take the battery out, the airbox, and the mount that the battery sits on. Installed new one, bled the coolant and burped it by using the bleeder valve attached to the back of the coolant outlet itself, and so far so good. I did have a misfire code from when the air was bleeding out of the system and it burped. I felt the misfire but now it's running smoothly. Good heat. Cold AC. Temp gauge sits dead center. Fingers crossed it is fixed. I would suggest you replace the whole thing from a reputable Ford dealer. Dorman makes one that Advance sells but I was told that the quality isn't so great. The part was $39.50 from the local Ford place.