The 2011 Nissan Frontier is available as a 4-door, 4-seat regular side. Starting at $18,200, the 2011 Nissan Frontier S (M5) 4x2 King Cab is powered by a 2.5L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 19-mpg in the city and 23-mpg on the highway. The top of the line 2011NissanFrontierSL 4x4 Crew Cab Long Box , priced at $ 32,080 , is powered by a 4.0L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 14-mpg in the city and 19-mpg on the highway.