BMW is set to introduce a range-extender (REx) drivetrain in its sixth-generation X5 SUV, offering extended electric driving capabilities without relying on extensive charging infrastructure. The decision to revisit REx technology comes as a response to the growing demand for such models, especially in markets like China where charging networks are still developing. The REx drivetrain is expected to provide electric ranges of over 600 miles between refuelling, with plans to expand to other popular models like the X3 and X7. This move signals a change in BMW's strategy, as CEO Oliver Zipse previously highlighted concerns over the technology's cost. The company is also advancing its electric drivetrain technology by incorporating elements of ZF's newly developed range-extender system and leveraging experience from the iX5 Hydrogen programme. BMW's upcoming Neue Klasse EVs are expected to feature significant technological advancements, including a new type of NMC battery with cylindrical cells that offer increased range, efficiency, faster charging, and reduced production costs. The decision to reintroduce the range-extender is influenced by the success of Chinese car maker Li Auto, which has seen significant growth with its range-extender models. BMW's partnership with ZF for the REx system and development of NMC battery technology indicate a shift towards more versatile and efficient electric drivetrains in the automotive industry. Overall, BMW's focus on innovation and adapting to market demands underscores its commitment to sustainable mobility and technological advancement.