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    Alternator Amperage

    Hi guys,

    So my battery light stays lit up after I turn off the car and remove my keys. After some google searches, general consensus is that the alternator is bad.

    I am planning to get an used alternator from someone and is wondering if all e30 alternators are interchangeable. I did some searching and it shows that the m20 uses a 95 amp alternator and m42 uses a 80 amp? I have a M42, is it okay for the car to be running a higher amperage alternator?
    Last edited by toboi; 04-04-2015, 04:10 PM.

    #2
    Sure, I have seen people use multiple alternators in car audio competitions. You will be fine interchanging your alternator.
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      #3
      How about fitment? Is it a direct fit? Or is modification necessary?

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        #4
        Originally posted by toboi View Post
        How about fitment? Is it a direct fit? Or is modification necessary?
        No, its not, unless it is E30 and M20, it isn't a direct fit

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