The Nissan Frontier saw no major changes for 2004, as it was due for an overhaul for the next year.
The 2004 Frontier comes in four trims: the XE, the Desert Runner, the fully loaded SE, and the Supercharged model. The trims came in a variety of body styles, including an extended cab (KingCab), the Crew Cab, a short bed, 4WD, and a regular cab. Most Frontiers, except the Crew Cab and Supercharged, came standard with a 2.4-liter, 143-horsepower four-cylinder engine that gets about 20/24 mpg in the standard cab and 18/21 for the extended cab. The Crew Cab came standard with the 3.4-liter, 170-horsepower V6, which got 15/19 mpg and which was optional in the KingCabs. The Supercharged model came with a 3.3-liter 210-horsepower V6, getting about 15/18 mpg.
The 2003 Frontier comes in four trims: the XE, the Desert Runner, the fully loaded SE, and the Supercharged model. The trims came in a variety of body styles, including an extended cab (KingCab), the Crew Cab, a short bed, and 4WD. Most Frontiers, except the Crew Cab and Supercharged, came standard with a 2.4-liter, 143-horsepower four-cylinder engine that gets about 20/24 mpg in the standard cab and 18/21 for the extended cab. The Crew Cab came standard with the 3.4-liter, 170-horsepower V6, which got 15/19 mpg and which was optional in the KingCabs. The Supercharged model came with a 3.3-liter 210-horsepower V6, getting about 15/18 mpg.
Drivers like the 2004 Nissan Frontier for its good looks, reliability, and affordable price tag. Some drivers complain that the cab can feel a bit cramped, and some find the four-cylinder engine to  lack sufficient power.