Ford 2003 Mustang Workshop Manual page 2

5 Computer generated VIN check digit
6 Model year code
7 Assembly plant code
8 Production sequence number
Vehicle Identification Number
World Manufacturer Identifier (WMI)
The first three vehicle identification number (VIN) positions are the world manufacturer identifier (WMI).
1FA — Ford, USA, passenger car
Restraint Type Code
The fourth VIN position is the vehicle restraint system type code.
F — Active safety belts — all positions, driver and front passenger air bags
Line, Series and Body Type Code