ECM Identification
Find the ECM part number on your ECM and use this guide to determine your ECM model. The ECM part number can be found on the decal on the back of your ECM.
MEFI 1 + 2
16159919 | 16189069 | 16220371 | 16234539 | 16201649 | 16210729
MEFI 3
16237009 | 16237019 | 16236999
MEFI 4
4: 12569494 | 4A: 12575479 | 4B: 12584052
MEFI 5
5A: 12597744 | 5B: 12607802 | 5C: 12618020 | 5D: 12628090 | 5E: 12635518
MEFI 6
6A: 12649040 | 6B: 12654117 | 6C: 12679057
MEFI 7
12665555 (Specific to Gen V Engines) | 12686224