The 2012 BMW 550 is available as a 4-door, 5-seat sedan. Starting at $62,000, the 2012 BMW 550 RWD is powered by a 4.4L , 8 -cylinder engine mated to a manual transmission that returns an EPA estimated 15-mpg in the city and 22-mpg on the highway. The top of the line 2012BMW550AWD , priced at $ 64,300 , is powered by a 4.4L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 20-mpg on the highway.