Ahung12
Well-Known Member
Gonna throw out a wildcard in case it's not a wheelbearing: Is it possible that the rear diffuser or some other underbody panel somehow has come loose? If it only becomes noticeable above 35mph, it feels like it might have something to do with airflow around the vehicle, and a loose panel or flap may go from fluttering to vibrating to buzzing at speed.
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