BMW has adapted its Spartanburg factory in the US for the production of the new X3 xDrive30e and X5 xDrive45e plug-in hybrid SUVs, which will be sold alongside existing petrol and diesel-powered versions.
The firm has doubled the size of the factory's battery assembly facility in an investment programme it says has cost US$10 million (£8 million).
The two new hybrid models will feature pure electric capability for limited distances, with powertrains that make use of plug-in electric and energy recuperation technology.
No specific powertrain details have yet been revealed, but the X3 xDrive30e reportedly uses the same powertrain as the recently introduced 330e.
The unit combines a turbocharged 2.0-litre four-cylinder petrol engine developing 181bhp with a gearbox-mounted electric motor delivering 112bhp. Total system output is 288bhp, with peak torque rated at 310lb ft.