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Got m5 back yesterday from service. They cleaned everything and applied thin layer of brake paste to rotor The conference call with regional tech guru was useless in my view. They then drove car for 50 miles over 2 days to see if problem is gone. Yesterday and today no squeal . But we all kinda know (BMW service and me ) that I will be back.
One good thing is that they claim that this is not normal so next time I will be calling bmw customer service for a resolution. My feeling is that this is happening with a small percentage of m5's and they have 2 choices : 1) to continue replacing brake pads and rotors until a set "works" or declare the squeal a normal characteristic of the m5 . I won't be surprised if they take #2.
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