Actually any vehicle in the US can be 1, 4, or 5. My Nissan Frontier is a 1. For 2008 Ford breaks down the 1's, 4's, and 5's this way:
1F1 Ford Motor Company, USA Ford MPV - Limousine 1F6 Detroit Chassis LLC, USA Ford Basic (Stripped) Chassis 1FA Ford Motor Company, USA Ford Passenger Car 1FB Ford Motor Company, USA Ford Bus 1FC Ford Motor Company, USA Ford Basic (Stripped) Chassis 1FD Ford Motor Company, USA Ford Incomplete Vehicle 1FM Ford Motor Company, USA Ford MPV* 1FT Ford Motor Company, USA Ford Truck (Completed Vehicle) 1ME Ford Motor Company, USA Mercury Passenger Car 1MH Ford Motor Company, USA Mercury Incomplete Vehicle 1ZV Automotive Alliance International (USA) Ford Passenger Car 4F2 Ford Motor Company, USA Mazda MPV 4F4 Ford Motor Company, USA Mazda Truck (Completed Vehicle) 4M2 Ford Motor Company, USA Mercury MPV 5L1 Ford Motor Company, USA Lincoln MPV - Limousine 5LM Ford Motor Company, USA Lincoln MPV 5LT Ford Motor Company, USA Lincoln Truck (Completed Vehicle)It has been different in past years, although in general, the 4's are used for vehicles built in Ford plants for other manufacturers (Mazda and Nissan) and the 5's are used for Lincoln "trucks."
For Toyota
1 = NUMMI (joint GM / Toyota plant in California) 4 = Toyota Motor Manufacturing Kentucky 5 = Toyota Motor Manufacturing Indianna, California, and TexasAs others have stated, 2's are for Canada, 3's are for Mexico, J's are for Japan. FOr a more complete list, see
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. Ed