WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Production Sequence Code
Courtesy of FORD MOTOR CO.
The last 6 VIN positions are the production sequence number. These 6 digits also are used as the vehicle serial and warranty number.