The 2012 Nissan Xterra is a four-door, five-passenger SUV that's offered in three trim levels. The X comes standard with 16-inch steel wheels; rear privacy glass; roof rack side rails; keyless entry; air-conditioning; cloth upholstery; a 60/40 split-folding rear seat; power windows, locks and mirrors; cruise control; tilt-only steering wheel and a six-speaker CD stereo. Stepping up to the S gets you 16-inch alloy wheels, off-road tires, a driver seat with adjustable height and lumbar, a first aid kit and a cargo organization system. Four-wheel-drive S models also get a roof rack with crossbars and a gear basket.