The cracks I mentioned above.


EDIT: I recommend inserting the knife blade into the cracks BEFORE you try to lever the case open. Without breaking the epoxy/sealant that is in these cracks, you'll have a VERY HARD TIME levering the case open.

ALSO: I have noticed recently that the original keys fobs I am seeing (from 2004-2008) are starting to become brittle with age. The original key fobs are coming apart a little easier, BUT almost every one I have done lately has cracked or broken in the process of getting it apart. So BEWARE: you probably won't be able to go back to your original key fob case if you attempt to open it up and swap the guts!

I have also see a new case crack and tear while opening it up. Most of the time it cracks or tears along the same lines as where I show putting the knife in to break the sealant/epoxy. After you reassemble the fob (and make sure it works) you can add a drop of crazy glue along the crack/tear to give it some added strength. But don't glue it until you know it works, as you won't get it apart again without destroying the fob's case.