difference betwin ECU numbers ???

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Yaro

Member
Posts
29
Location
Wigan, Lancashire
Hello
Im looking for information about Engine ECUs numbers and difference betwin them.

I have in my GEMS 4,6
6645 - but when I swap it for another one with same numbers, my engine run very badly.
I find on e-something, many of ECUs to 4.6 and some of them have different numbers ,so what is the difference ?

5740 - ?
 
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