Xterra X (4x2 and 4x4)
X offers the core equipment: a powerful 261-hp engine, 6-speed manual transmission, 2- or 4-wheel Limited Slip (ABLS), 4-wheel Anti-lock Braking System, Vehicle Dynamic Control, [2] a tubular roof rack with air dam, and power door locks and windows. 

Xterra S (4x2 and 4x4)
Adds hard-core style and comfort: 16" 5-spoke aluminum-alloy wheels, 8-way manual adjustable driver's seat, cargo net, first-aid kit, tubular step rails, roof rack crossbars and covered gear box and Easy Clean cargo area with Utili-track Cargo Channel System.

Xterra Off Road (4x4 only)
Rock crawlers, just strap in and go: Bilstein® off-road performance shocks, skid plates, 16" 6-spoke aluminum-alloy wheels, electronic locking rear differential, hill start assist, hill descent control, clutch start/cancel, roof-rack-mounted off-road lights and fog lights.

Xterra SE (4x2 and 4x4)
The most Xterra you can get: 17" aluminum-alloy wheels, satin chrome/black front bumper, body-color exterior accents, trip computer, leather-appointed seats and titanium-tinted gauge accents.