2004 BMW xActivity Concept Photo Gallery

The xActivity show car has no roof, no B- or C-pillars, and no rear glass, but still bears a striking resemblance to the forthcoming X3.

Despite a one-inch shorter wheelbase, the xActivity has more cargo space than an X5 (17.7 cubic feet versus 16.4).

Rear styling is clean if not uninspiring. Taillights use light-emitting diodes, while the white center stripe do double duty as turn indicators and reverse lights.

Trademark BMW cues like the double-kidney grill and four round headlamps are easy to recognize.

Two bikes fit in the back when the rear seats are folded down.