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      04-03-2018, 01:59 PM   #4
stbm5
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Drives: 2018 M5 DG
Join Date: Mar 2018
Location: 72211

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if its a pebble in the heat shield it should be really loud and likely coming from just one caliper. if that seems like it then try driving a bit in reverse or pressing the heat shield back with your fingers and see if a little pebble falls out.
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