The 2005 Infiniti FX35 is available as a 4-door, 5-seat sport utility. Starting at $35,100, the 2005 Infiniti FX35 4x2 is powered by a 3.5L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 23-mpg on the highway. The top of the line 2005InfinitiFX35AWD , priced at $ 36,600 , 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 22-mpg on the highway.