the e84 x1 is the first-generation model and was originally presented as the bmw concept x1 at the paris motor show in 2008. it is based on the same platform as the e91 3 series touring, and features similar dimensions including the same wheelbase. it was not introduced to the united states until 2012. in 2013, the e84 x1 underwent a facelift, featuring restyled exterior and interior design elements, as well as the integration of bmw efficientdynamics on all models. the original x1 sold 820,529 units.