The 5-passenger X5 M is available in one comprehensive trim level, powered by a muscular 4.4-liter twin-turbo V8 engine that puts out 555 horsepower and 500 pound-feet of torque. A six-speed automatic transmission with Steptronic manual mode and paddle shifters is standard, along with BMW's xDrive intelligent all-wheel drive system. The X5 M boasts standard features that include an adaptive sport suspension, 20-inch alloy wheels, heated front M sport seats, leather upholstery, aluminum interior trim elements, Bluetooth wireless connectivity and a voice-activated hard drive-based navigation system, including 12 gigabytes of dedicated media storage and DVD video capability. Safety features on every X5 M include anti-lock disc brakes, Dynamic Stability Control with traction control and rollover sensor, bi-xenon adaptive headlamps, BMW Assist and front and rear parking sensors, as well as front side-impact airbags and overhead curtain airbags for both rows. All-new last year, the BMW X5 M carries over unchanged for 2011.