Question: what are the bmw x series?
Answer: BMW X1 (SUV based on 1 Series platform)
BMW X2 (SUV based on 1 Series platform)
BMW X3 (SUV based on 3 Series platform)
BMW X4 (SUV with Coupé roofline, based on X3 platform)
BMW X5 (SUV based on 5 Series platform)
BMW X6 (SUV with Coupé roofline, based on X5 platform)
BMW X7 (SUV based on 7 Series platform)