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      11-18-2017, 10:13 PM   #19
0_to_60
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Drives: E92 M3
Join Date: Jul 2011
Location: LA, CA

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If anyone in the future needs to replace their alternator, i would get it tested first at autozone on the car and see what has failed first. The voltage regulator failed on mine, everything else passed on the alternator. When i took apart the alternator, and took of the plastic housing in the back (it pops out, using a flathead screwdriver). Than there is 3 8mm bolts holding the voltage regulator. Once i took that apart, i inspected the brushes and they were really short and worn out. I had the option of replacing the brushes or putting on a diff work ing volt regulator with good brushes (i took this step). I installed everything back, ran some tests with multimetere and everything looked good. I also went to autozone they tested the alternator once again and it passed everything including the volt regulator..
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