The 2004 Nissan Frontier is available as a 2-door, 2-seat regular side. Starting at $13,490, the 2004 Nissan Frontier Standard (M5) 4x2 King Cab is powered by a 2.4L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 22-mpg in the city and 27-mpg on the highway. The top of the line 2004NissanFrontierXE-V6 (A4) 4x4 Long Bed Crew Cab , priced at $ 23,370 , is powered by a 3.3L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 20-mpg on the highway.