So you've had no diagnosis by BMW and you're convinced your turbo is dead? There could be many other reasons, not the least of which might be a leak in the turbo plumbing, particularly the charge pipe. I'd wait to get the official diagnosis before declaring to the world that this is some sort of endemic problem.
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2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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