The 2007 Nissan Frontier is available as a 4-door, 4-seat regular side. Starting at $22,900, the 2007 Nissan Frontier LE (A5) 4x2 King Cab is powered by a 4.0L , 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 2007NissanFrontierSE (A5) 4x4 Crew Cab Long Box , priced at $ 25,350 , is powered by a 4.0L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 20-mpg on the highway.