The Nissan Xterra is a mid-size SUV that was produced by the Japanese automaker Nissan from 1999 to 2015. It was designed for off-road performance and featured a rugged body-on-frame construction. The Xterra was powered by a variety of engines, including a 4.0-liter V6 and a 2.4-liter four-cylinder. It was available in both two-wheel and four-wheel drive configurations. The Xterra was well-received by critics and consumers alike, and it remains a popular choice among off-road enthusiasts.