I still think something is probably hanging up and heating the rotor(s) non uniformly. Can you see a lot of pad deposits on the rotor? I'd see if a cylinder is bent or stuck or slow to retract.
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Josh (PA) -
'19 X5
'17 991.2 C2 Cab
'11 135i Convertible
'11 328xiT
'09 X3
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