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      10-18-2019, 09:49 AM   #22
m4mehdi
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Drives: 2021 M4 - 2019 X4 M40i
Join Date: Jan 2011
Location: NoVA

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I have EXACTLY the same problem, SAME symptoms as described in your post. Did some digging around, and it seems like the 2015's suffer from the rear differential bushings coming loose (<---insert correct term here). Took it to the dealership, they assured me that the bushing is not the reason but couldn't tell me what it was. I have experience this both with stock 19" wheels and tires and it feels the same with the 20" wheels I currently have on the car.
I agree it's a "bad" feeling when the car does this but doesn't seem anything major from what I have gathered, at least, thus far!
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