With a 340-hp 4.6-liter V8 making 350 pound-feet of torque underfoot, plenty is special about the ground-pounding X5 4.6is. Originally shown at the 2001 North American International Auto Show, the 4.6is was delayed a few months and, as a result, incorporates several changes made to all 2002 X5 models.

Sixty mph comes up in about 6.5 seconds, thanks in part to a recalibrated Steptronic automanual transmission that provides sportier shifting. Keeping this X5 glued to the ground is a sport suspension with the third-generation of BMW's Dynamic Stability Control and exclusive 20-inch alloy wheels shod with 275/40 tires up front and 315/35 skins in the back squatting under flared wheel arches. So concerned were engineers about the handling prowess of their new baby, they insured a low center of gravity by routing the driveshaft for the front wheels through the oil sump to keep the engine mounted as low as possible.

Exclusive interior colors and materials, unique exterior colors and special exterior trim all call attention to the fact that the 4.6is is the flagship BMW SUV. The body-color front air dam with lower air intake scoops and side wind splitters sits beneath standard xenon headlights. In back, a body-color rear air dam with wind splitters on the side is punctuated by dual chrome exhaust pipes.

All X5s get an enhanced Hill Descent Control (HDC) system and a new trailer stability control system. HDC acts as a reduction gearbox when the vehicle is traveling forward or backward, limiting speed regardless of the angle of descent. The new system allows speed changes when in HDC mode by pressing the "+" or "-" cruise control buttons on the multi-function steering wheel. This keeps the driver's feet away from the pedals and allows her to add speed input much more carefully than before.

Trailer stability control recognizes the natural tendency for a trailer to sway as it is towed and rapidly brakes the X5 to bring the swinging trailer under control. Engine torque is reduced at the same time.

Finally, a self-leveling suspension became optional this summer, allowing the X5 to be heightened and lowered for loading/unloading and entry/exit. An inch of extra ground clearance is also available when off-roading.

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