White smoke pouring out exhaust. Took it to shop and was told I need new valve seals, timing kit, and new coolant lines on turbos. The BMW repairman told me to sell the vehicle asap. The repair cost was going to be $7,000. I sold the car at a loss because of the smoking. It was a 2011 550i that I bought from my doctor who bought it new. It only had 78,000 miles on it when the trouble started. I had planned to drive this car for the rest of my life, but since all this came up I had to sell it at a huge loss.