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      09-17-2020, 10:41 PM   #2
knightarmor
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Drives: 2017 M3
Join Date: Jan 2015
Location: Washington

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Unfortunately bumper cover removal is the best way to really clean everything out. Not too bad to remove the bumper cover either.
I did this a while back- https://f80.bimmerpost.com/forums/sh....php?t=1631681