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  • ECU Question

    I've got a friend who's brother's E30 M3 has dropped its ECU. He needs a replacement. He's under the impression that the European M3 has a different sized engine and needs a different ECU than the US versions. I've stated to him the difference in the M3 EVO, COECETTO, etc. and stated that unless he has a special edition E30 M3 or has done some crazy engine work, a standard replacement ECU will work with all E30 M3s. Before I message him back telling him he's wrong, I just want to confirm that even if he did have a Euro spec E30 M3, the ECUs in the European and US E30 M3s have the same wiring harness (loom) that connect and either would work.

    I've looked on http://www.realoem.com but there seem to be a few different part numbers depending upon the year of the car. Can any one elaborate further what I need to confirm to help him out.

    Thanks all!
    Randall Prince's Used Cars
    1991 BMW 318is (slowly tearing apart to become a SpecE30 car)
    1995 BMW M3 (Cone eater. Probably going the way of an LS1 swapped XP car)

  • #2
    Just match up the the part number on your friends ECU and you'll be fine, I have a Euro spec m3 and received the ECU from a member in the US. Just make sure the numbers match.
    -Tony-
    1991 M3 10Km
    1989 M3
    BEGINS HERE


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    • #3
      ECU's are interchangeable among all E30 M3's, provided the right chip is used. Not all stock chips work with all ECU's, but most aftermarket chips do.

      -Luis

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