At its 2003 introduction, the X3 offered something no one else could-a luxury-compact with the versatility and all-road capability of a sport-utility, combined with the quality, performance and handling of a BMW. Compared to the large domestic and Japanese sport-utility vehicles then dominating the market, the X3 offered a smaller, more nimble, yet in many ways equally versatile alternative. The X3 also introduced drivers to xDrive, BMW's "intelligent" all-wheel-drive system that offers near-instantaneous torque apportioning with...