Spy photos of BMW's electric 3 series, referred to as a Tesla Model 3 fighter, have surfaced in Europe.
Although the vehicle looks like a conventional internal combustion engine 3 series, it has an "Electric Test Vehicle" sticker on the side and a closed-off twin kidney grille.
The range for the electric 3 series is unknown, but it should deliver 400-480 km (250 to 300 miles) on a full charge if it expects to compete with the Model 3.
European sales of the 3 series have dropped 20 percent through June this year to 57,257, according to data from JATO Dynamics.
The new 3 series, code-named G20, will ride on a variant of BMW's flexible, lightweight CLAR cluster architecture for rear-wheel-drive vehicles. It will have a lower center of gravity and lighter curb weight.
The redesigned 3-series sedan, expected to be revealed in October at the Paris auto show, will go on sale in 2019. An M performance version likely will appear a year later.
It's unclear when BMW will launch the full-electric variant of the 3 series, but it is part of the company's ambitious electrification plans.
The automaker expects to roll out a dozen full-electric vehicles by the middle of the next decade. BMW will introduce the iNEXT battery-electric crossover and the i4 four-door electric coupe in 2021. A battery-electric variant of the X3 crossover will go into production in 2020.