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SAP1
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Post Wed Aug 07, 2013 6:12 pm

Will a M20 alternator fit an M40B18? Cheers
magpie
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Post Wed Aug 07, 2013 9:04 pm

if you change the pulley wheel for the 4-pot one it should ? maybe

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SAP1
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Post Wed Aug 07, 2013 11:43 pm

Thanks for the help buddy! But does anyone know for sure? Cheers :)
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SAP1
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Post Sun Aug 11, 2013 10:37 am

?
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Billwill
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Post Mon Aug 12, 2013 12:56 pm

Have you checked bmwfans.info for the different models? maybe the part numbers without pulley are the same? :?