Seems to be about 85%...
At least that's the perception here if you read one horror story after another, not realizing that e90 is a tiny little portion of total e9Xs on the road.
Then Figure in all the fuel pumps that Proceed, exceed, Blah Blah Blah have killed...
Pretty much I think the total for the real world is something like 4-5% or so, someone worked up the number here on the forums and that is about what you are looking at I think. Makes sense, and explains why there is no recall as of yet.
Far more concerning to me is the power steering pump pulley issue...