I got a 2000 Lincoln LS. Brand new model, new platform,new suspension, new engine, new trannie. I had essentially no problems with it. A software update was done to improve trannie shifting and that was about it. I know someone else who bought a 2000 LS and has ~130K on it, no problems, just routine maintanence. Since the Mustang ATX is essentially the same as in the LS, the MTX is the same as has been used in the Mustang since mid 2001, most of the electronics are lifted from the LS and the 4.6L V8 has been in production fo r 10 years, the 3V heads have been in production for over a year, I'd say anyone buying a new 2005 Mustang does not have much to worry about.