BMW 650i xDrive Gran Coupe vibration issue under boost at 1500-1900 RPMs on BMW 650i xDrive Gran Coupe

Some BMW 650i xDrive Gran Coupe owners report experiencing vibrations under boost between 1500-1900 RPMs, particularly noticeable when climbing hills or using cruise control. This issue can sometimes be temporarily alleviated by manually downshifting to raise the RPM above 2000, which stops the vibrations until the transmission upshifts again. Owners have noted that these vibrations may stem from various underlying problems, including crankcase ventilation issues or complications with the N63 V8 engine, which is known for oil burning, heat-related problems due to turbo placement, and oil leaks. Addressing these concerns often requires professional intervention, with independent BMW specialists typically charging around $2,500 for repairs. It is crucial for owners to address these issues promptly to maintain the optimal performance and reliability of their BMW 650i xDrive Gran Coupe.