Q: RPM fluctuation

asked by on April 24, 2017

I have a 2009 bmw 535i x-drive twin turbo. I have a problem with the rpms only at 2500 and then it drops only 500 rpms. When it drops 500, it drives normally up until 2500 again. It shakes as well during this problem

My car has 40000 miles.
My car has a manual transmission.

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