Bolt pattern and center bore are shared over most (all?) the models of late, and many 19" wheels we sell for X5 will work on X3. The X3 shares many fitments with E46 but not all. I tend to shy away from sweeping generalizations, however, so I can't give you the green light to look at any E46 wheel. We sell what we can guarantee to fit each individual model, and unless the supplier you are dealing with can promise that as well........