The 2009 Infiniti FX35 is available as a 4-door, 5-seat sport utility. Starting at $43,600, the 2009 Infiniti FX35 AWD is powered by a 3.5L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 21-mpg on the highway. The top of the line 2009InfinitiFX354x2 , priced at $ 42,150 , is powered by a 3.5L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 23-mpg on the highway.