https://carbuzz.com/news/bmw-is-rena...e-model-lineup
BMW has registered trademarks for numerous names with the i, X, and iX prefixes. For example, the manufacturer has filed to protect the names iX750, X750, and i750. Similarly, there are trademarks for the names iX130 and i120. The question is what each of these trademarks is for, as multiple potential applications present themselves.
It seems that the name i750 would apply to the electric 7 Series, the i7, with a powertrain designation of 50. If we use the same logic for X750, the name could apply to the X7 SUV with a '50' powertrain. The new logic suggests that the iX750 nomenclature would refer to the forthcoming electric version of the X7 to be called the iX7. Basically, BMW will adopt its sedan naming strategy for both sedan and SUV derivatives, dropping the current sDrive and xDrive suffixes with integrated 35i, 40i, and 50i powertrain designations. Instead, we suspect xDrive will be used as a standalone suffix to denote an all-wheel drivetrain.