(Third character in a part number prefix.)
| A | Ford (Generic) / Galaxie (1958-later) | |||
| B | Bronco 1970-73 | Maverick 1975-77 | Fairmont 1978-83 | |
| C | Remanufactured Parts 1966-75 | Elite 1975 | Capri 1979-later | |
| D | Falcon 1960-69 | Maverick 1970-74 | Granada 1975-82 | |
| E | Truck-Cab over Engine 1970-73 | Pinto 1976-80 | Escort | |
| F | Foreign sales / Trans Am Racing | |||
| G | Comet 1961-67 | Montego 1968-76 | EXP 1982-later | |
| H | Holman/Moody HiPo Part | Heavy Truck 1966-82 | ||
| I | NOT USED | |||
| J | Industrial / Marine engines | |||
| K | Edsel 1958-60 | Tilt Cab 1970-73 | Comet 1975-77 | Zephyr 1978-83 |
| L | Lincoln 1958-60 | Mark 1961-later | ||
| M | Mercury 1958-later | |||
| N | Tractor 1958-later | |||
| O | Fairlane 1962-68 | Torino 1969-76 | LTD II 1977-79 | |
| P | Autolite, Later Motorcraft 1962-later | |||
| Q | NOT USED | |||
| R | Rotunda-Generic 1962-69 | Ford of Europe 1970-later | Remanufactured Parts 1976?-later | |
| S | Thunderbird 1958-later | |||
| T | Truck 1958-65 | Light/Medium Truck 1966-82 | Bronco 1966-82 Except 1970-73 | |
| U | Econoline/Club Wagon Van 1961-later | |||
| V | Lincoln Continental 1961-81 | |||
| W | Cougar 1967-80 | XR7 1981-82 | Cougar 1983-later | |
| X | Truck-Short Highway 1970-73 | |||
| Y | Meteor-Canada 1962-72 | Bobcat 1975-80 | Lynx 1981-later | |
| Z | Mustang 1964-73; Mustang II 1974-78; Mustang 1979-later | |||
| 1 | NOT USED | |||
| 2 | Pinto 1972-75 | |||
| 3 | Tempo 1984-later | |||
| 4 | Comet 1971-74 | Monarch 1975-80 | Cougar 1981-82 | Marquis 1983-later |
| 5 | Recreation vehicles 1974-75 | Continental 1982-later | ||
| 6 | Pantera 1971-75 | Topaz 1984-later | ||
| 7 | Courier 1971-82; Ranger/Bronco II 1983-up; Explorer 1991-later | |||
| 8 | Capri (U.S. Parts) 1972-75 | |||
| 9 | Turbine Engine Parts 1970-75 |