The SR5 and Limited trims are available in rear- or four-wheel drive. A new Trail Edition with rear locking differential, crawl control, rock rails and moonroof is only available in four-wheel drive. Each trim has a five-speed automatic transmission and a 270-hp 4.0-liter V6 engine. A rear-wheel drive SR5 with a 157-hp four-cylinder engine and four-speed automatic transmission is expected to have late availability. An optional third-row seat expands the passenger capacity to seven. Stability control, traction control, 12 airbags and roll-over sensors are standard. The Toyota 4Runner is redesigned for 2010.