The 2006 BMW 525 is available as a 4-door, 5-seat sedan. Starting at $42,500, the 2006 BMW 525 RWD is powered by a 3.0L , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 20-mpg in the city and 30-mpg on the highway. The top of the line 2006BMW525AWD , priced at $ 44,700 , is powered by a 3.0L , 6 - cylinder engine mated to a manual transmission that returns an EPA estimated 19-mpg in the city and 28-mpg on the highway.