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      12-06-2012, 09:25 PM   #2
SamS
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Drives: 2016 M3
Join Date: Jul 2010
Location: Dallas, TX

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That is iron rust from the rotors, that got wet and slung all over the wheels. Normal.
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2016 M3 - current
2013 ActiveHybrid 3 - sold
2012 M3 coupe - sold