'12 650i xdrive
I took my car to the dealer to have it checked out because of the car stuttering when accelerating moderately and because of the oil consumption and excessive exhaust smoke. The dealer is replacing the valve stem seals, battery and oil separator for free. The N63 engine has had so many problems that there is a class action lawsuit addressing issues.
https://bangclasssettlement.com/Comm...sked-Questions
The techs at the dealer did some tests and sent them to BMW NA where they determined that my engine was in good enough condition to fix instead of giving me a rebuilt engine.
The tech said that the stuttering is because of the transfer case and nothing to do with the valve stem seals. I guess I'll be tearing that apart when I get the car back. I have already replaced the rear output flange.
Anybody else have a similar experience?