The 2016 BMW X3 is available as a 4-door, 5-seat sport utility. Starting at $40,950, the 2016 BMW X3 xDrive28i AWD is powered by a 2.0L , 4 -cylinder engine that returns an EPA estimated 21-mpg in the city and 28-mpg on the highway. The top of the line 2016BMWX34x2 , priced at $ 38,950 , is powered by a 2.0L , 4 - cylinder engine that returns an EPA estimated 21-mpg in the city and 28-mpg on the highway.