Try this site for more information on Car Diagnostic Tool. OEM scan tools include the Tech II for General Motors applications, New Generation Star (NGS) tester for FordLincolnMercury, DRB III for Chrysler, and a list of others for the Asian and European makes. Some of these are now obsolete, having been replaced by more advanced PC-based scanner software in dealerships. Even so, for home diagnostic work, you can often find one of these older Car Diagnostic Tool at reasonable prices.