Computer-Generated Check Digit - Position 5
WARNING: This page does not describe the selected car, but rather 20 other vehicles, including the 2003 Mercury Mountaineer, 2003 Lincoln Navigator, 2003 Lincoln Blackwood, 2003 Lincoln Aviator, and 2003 Ford Windstar. However, it is still accessible from the selected car via links, so may be relevant.
The 9th number in VIN is the check digit code (0-9).