the 3 button DIC that comes standard with the base model 04+ only has trip computer and a very general oil monitoring system. The 5 button model has trans temp gauge, volt gauge, boost gague (if applicable), outside temperature gauge, compass, timer, oil % remaining, trip computers, avg speed, avg fuel economy, instant fuel economy, range, etc. This upgrade only applies to the 04+ crowd. You could put the DIC into any other car that uses the Class 2 Serial Data bus and have these features as well though I suppose.
