Based on the 5 Series' platform, the 6 Series is BMW's grand touring luxury sport coupe/convertible (E63/E64). A 2-seater roadster and coupe which succeeded the Z3 , the Z4 (E85) has been sold since 2002. BMW X3 SUV (F25) The X3 (E83), BMW's second crossover SUV (called SAV or "Sports Activity