For 2003, the six-cylinder engine got a boost in horsepower, but other than that, the Nissan Frontier stayed largely the same for the model year. 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, 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 2003 Nissan Frontier because its reliable and affordable. Drivers also say it is good looking, and with the Supercharged option it is very fun to drive as well. Some drivers find the interior to be unpolished and rather tight.