So my OEM ECU died and finding an exact match has been an issue. My car is an 03 6mt touring and the ECU I got was supposedly from another unknown 03 6mt. Installed the ECU and went to flack it with the file I had with no-NATs and got an incompatibility message. Attaching pics of the two ECU, can’t seem to find anything anywhere on what ECU are compatable with what. I just want this car running so I can sell it.




My original ECU I did the return to stock file on it and sent it out for repairs. Was returned to me unrepairable

 

Are you 100% sure your donor was from an 03 model year?

I think there is some grey areas when swapping ECUs - what you’ve explained (to me) should work.

It may be wise to get some support from Uprev if you are having issues

 

was crazy is I can’t find anything to Google or verify ECU numbers yet. From what I understood, it should work

 

The ECU part # is what matters. You have to use a compatible rom for the ECU you're trying to flash... you cannot use your old file unless the ECU part # of the new ECU is the same as the old one.

 

The only guaranteed way to find it is to plug the ECU in, and check it with Rom Editor

 

I'm having a similar issue withe ECU, how did you fix this