Here's the deal. The MP215 did not void the warranty if installed by a genuine FORD dealer. It even has a CARB number (California Air Resource Board) number making it legal in California. It did reduce the power train warranty to 3 years/36 months however. Upon install it was registered to the FORD system, so it (they) know it was installed.
It can only be uninstalled by a Genuine Ford Service Center. It cannot be done by the owner. The Access Port is registered to the car. It cannot be used on another vehicle. Once the dealership uninstalls it it can be reloaded, either by the dealership, or by the car owner.
I had run one of my fobs thru the laundry so it was inoperative. I wanted another as a backup so I went to our local dealership. They cut the key, but when it came time to program the fob, they couldn't do it because the MP215 was loaded. They said they couldn't unload it. I asked if they were a genuine FORD dealership and they got a little huffy. Then they told me that the computers in Detroit were down so that they couldn't communicate back to central. FOR THREE DAYS? .. They charged me about $200 for cutting the key and the fob itself. I took my car to the dealership where I bought the car. They unloaded the MP215, programmed the fob and charged me another $300. I can't remember if they reinstalled the tune, or if I came home and reloaded the MP215.
Years later I was at my local mechanic (not a FORD dealership) and they tried to do something in the ECU and were blocked. I explained why. They said they had the same software as FORD and could get into the cars ECU, but I know better.
Hope this clears up any confusion.
There is an update for the MP215 so that it can still work after the upgrade to the coolant system sensor update. If you have that recall fixed, and do not do that update, your Access Port will no longer install. The name of the file is APMangersetup.exe. I tried to upload it but this system won't allow .exe files.
I have never done that recall. If your car hasn't overheated by now, it's not one that is affected adversely by overheating. There were a limited number of such cars but the recall covered ALL cars. I had driven my over the Siskiyous in 90 degree heat and never had a problem so I haven't bothered. I don't use the rear doors enough for that to be an issued either.
The overheating thing. Rather than fix the problem with the head gaskets failing, FORD simply did a software fix to alert the owner that that car was in danger of overheating with a warning light. BFD.