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      10-12-2016, 07:32 PM   #39
MRCUR
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Drives: 2018 Model 3 Performance
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This sounds exactly like the M3/4 when stone(s) get stuck between the brake and heat shield. BMW released a slightly modified shield for the M3/4, but for many people it hasn't totally resolved the issue. They also have a TSB for "spacers" on this same issue.
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