No responses... WOW.
Okay to answer my own question. MP3 capable factory stereo's say MP3 right on the front of them.
If you have a pre 03- Bose unit like I did you must get a BOSE 06+ unit.
The factory brackets all work, But you do have to do a little grinding/ filing to your faceplate to make it fit. Also the head unit it BLACK not gray.
All in all a GREAT Mod. I think it sounds way better than the POS 03- Bose unit I had, I don't lose my NAV voice and can now play MP3/WMA files.
As a bonus the 06+ head units have the option to turn the autopiliot OFF.