So when our intrepid spy shooters caught this oddly modified 7 Series with ActiveHybrid badging, the wheels of speculation began spinning.
Ignore for a second the misshapen front and rear fenders and direct your attention at the thin front wheels. The bits behind the spokes and brakes look remarkably close to hub-mounted motors, and it looks like there could be a set in the back as well.
BMW has made it clear that the i brand will spawn a number of models in the coming years and if there's any segment ripe for mass consumption, it's a sedan. So with the Tesla Model S due to arrive next year and the Fisker Karma continuing to get press, BMW needs its own EV sedan. And if it's packing a range extending engine, all the better.