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Thread: Please Help!!

  1. #1
    Join Date
    Nov 2006
    Posts
    6

    Default Please Help!!

    Can you put a Trnasmission computer in my 1991 525i from a 1995 525i?
    thanks
    Donf

  2. #2
    Join Date
    Feb 2006
    Location
    Oldham, England
    Posts
    3,078

    Default

    Quote Originally Posted by donf View Post
    Can you put a Trnasmission computer in my 1991 525i from a 1995 525i?
    thanks
    Donf
    If the two sets of numbers on the ECU are the same then you should be in with a chance. My guess is they will differ. Perhaps it might be an idea to say why you think the old one is duff and what gearbox you have?
    Oct '00 E46 330i. Feb '92 525i (departed)

  3. #3
    Join Date
    Dec 2003
    Location
    baton rouge, loserana
    Posts
    6,922

    Default

    it will bolt in but the computer systems are not compatiable 91-92 525 and 325 will drop right in (325 you need to swap the output flange, 30mm nut if i remember right, usually don't even need to change the seal) i've never tried if you can get away with swapping in the 93 and up tranny computer or if the harness changes too, it's a good bit of work if it doesn't work
    all america wants is cold beer warm cat and a place to take a poop with a door on it

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