Haz77 0 Report post Posted February 26, 2013 Very simply, How do I tell if I have a 90 or a 120A alternator on my 2000 E39 530i motorsport? Quote Share this post Link to post Share on other sites
BM WORLD 1285 Report post Posted February 26, 2013 they have a tag with part numbers and ratings on them . smaller size will be 90amp Quote Share this post Link to post Share on other sites
