The design of the new BMW X3 conveys elegance, agility and ruggedness. Up front, the forward-slanting BMW kidney grille and large headlight assembly combine with a powerful-looking front apron and hood boasting six contour lines sweeping down to meet at the kidney grill, giving the BMW X3 a bold presence. The twin round headlights combined with the round fog lamps form the triangular light pattern that is characteristic of BMW SAV design. The upper edge of the headlight assembly sports an accentuating chrome trim, creating the focused design typical of BMW vehicles. BMW's signature "Corona Rings" are again illuminated to function as the daytime running lights. When equipped with the optional Xenon headlights, the Corona Rings and daytime running lights are illuminated by bright white LEDs.

The profile of the new BMW X3 is also characterized by a unique interpretation of typical BMW X design features. Powerfully flared wheel arches and the short front and rear overhangs emphasize the robust character of a BMW Sports Activity Vehicle. The dynamic appearance of the silhouette is accentuated by three characteristic lines. The new BMW X3's brand-typical upper contour line at door handle level rises steeply at first within the front wheel arch area, then flows gently to the rear. Two additional subtle lines follow this contour line above the wheel arches.

The rear is characterized by horizontal lines, underlining the new BMW X3's robust character. Precise lines and expressively modeled surfaces create attractive light and shadow effects. The taillights, which are located far to the outside, have a distinctive T-shape that is characteristic of the BMW X3. LED light bars create a distinctive BMW night-time design signature.

Dimensionally, compared to its predecessor the new X3 is a half-inch (12mm) taller, 3.36-inches (83mm) longer, 1.1-inches (28mm) wider, and features a half-inch (12mm) more ground clearance. It rides on a wheelbase which is 0.6-inches (15mm) longer, at 110.6 inches (2810mm).