I like the car for sure but my thoughts on this are how can BMWs brand survive these negative experiences. I have 2 Nissan Z cars and never have the seals turned to stone or have valve train issues. My Porsche friend owns a Mercedes and a Porsche spyder and he has sworn off BMW for good. I have repaired all my issues for fairly reasonable money. Those were suspension issues, air shocks, cv shafts etc. This internal engine problems IE misfire running rough has been hard to cure. All sensors are good, all coils are good, brand new ruthenium NGK plugs, compression on all cylinders is good. I have changed out both cams and eccentric shaft on the drivers side. Now I probably need to do the passenger side since I still have a misfire on cylinder 4. I also read where the bad valve seals can clog the cats and im thinking mine might have that issue too.

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2005 4.4i with sport package