I googled about it and had discovered that BMW had a plethoria of problems with their V8 when they first introduced them to replace their historical inline 6. Looks like some things never change. I wouldn't trust BMW's new engines judging by the way they sound so rough and unsteady when they idle.
I am a mechanic. I am a car expert and so I know what I'm talking about. If you want a long lasting luxury car that won't break down. Get a Lexus.
East-