The 2014 BMW X3 is available as a 4-door, 5-seat sport utility. Starting at $39,800, the 2014 BMW X3 xDrive28i is powered by a 2.0L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 28-mpg on the highway. The top of the line 2014BMWX3xDrive35i , priced at $ 44,900 , is powered by a 3.0L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 26-mpg on the highway.