BMW presented the precursor to the X3 as a concept vehicle unveiled at the Detroit Auto Show in 2003. Dubbed the xActivity, BMW previewed a SAV based on the 3 Series platform, without windows and a vestigial roof.
BMW X3
BMW X3
BMW X3
BMW X3
BMW X3
BMW X3
As BMW used parts from the E39 5 Series in making the X5, likewise BMW engineers employed 3 Series parts with the X3, e.g., the rear suspension from the E46 330xi.
BMW X3