Drive along a brick/ concrete wall with windows open also can help.

When it happened to me it was one time rust between rear rotor and rock guard. Second time it was a stone between rock guard and front rotor. That one only happened in certain turns.

I have a subway and I will ride alongside somebody doing a big circle in a parking lot to find Corner sounds like bad bearing. You could use a bicycle to do the same. It’s better than just standing as the car drives past.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)