Here's a new one. I caller Ford directly, and a few dealerships, and no one had an answer. I did a google search, and that was a nightmare. I have in my hands a brand new shiny 2005 Mustang key. Only I drive a 2004. The head is redesigned, but the key part is identical, and can be cut to fit. My question though, is can it be programmed? Are the 2004, and 2005 pats systems the same, or at least are the transpoders universal? I know for example Explorer keys will work in Mustangs, and vise Versa. Same goes for a lot of other Ford, Lincoln and Murcury models. But I'm concerned about any changes made between the 2 model years. So before I got wasting $100 for a program, can anyone help me out?