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Quick ECU Question

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I have a 1988 MJ.


Wanting to upgrade the ECU, I purchased an ECU # EF8953005428 to swap out for my old one.


Just got the existing one out of my MJ and now I'm wondering if it might be from a newer-than-88 MJ.  Wondering if anyone on here can confirm?

Numbers from the existing one: 53007842 and S101155201A; also has a white sticker on the corner saying "9012".  Picture of existing ECU attached.





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