According to consumer affairs,
any BMW with an automatic transmission is the 3rd worst car you can buy pre-owned

.
http://www.consumeraffairs.com/news0...used_cars.html
"Buy a second-hand BMW with automatic transmission at your own risk."
I like all the factual, scientific empirical data and the exhaustive list of all the BMW models affected, years affected, etc. Apparently, they don't like Toyota's reliability either