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      01-18-2012, 06:22 PM   #7
EAS
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Drives: VF620 M3
Join Date: Mar 2010
Location: Anaheim, CA

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BMW recommends generally a rotor change but not always necessary. Minimum thickness is indicated on the rotor hat. Here is a link for reference:

http://www.e90post.com/forums/showthread.php?t=546064

If not replacing the rotor, a light cut on a lath to remove any lip can help. You can also add a small chamfer to the friction material at top and bottom of the pad to clear the lip until fully bedded if rotor surface is otherwise in good condition. Best solution is to get new pads and smooth/flat rotor surface
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