From what I understand, BMW changed its brake pad material somewhere around the MY2010-MY2011. My E46, E85, and E83 OEM brakes dusted like crazy. My 2012 135i barely dusts at all.
However, the 135i brakes have much less bite than the old OEMs. I put a set of akebono ceramics on the E83 and that is what the 135i brakes remind me of.
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