BMW i4 Convertible: an electric drop-top for 2028, with range as the trade-off

BMW has not officially unveiled the electric i4 Convertible, so neither the launch date nor the specifications can be treated as final. According to BMWBLOG, the convertible carrying the internal codename NA3 is due in 2028, with four seats and a folding fabric roof.

The car is expected to join the Neue Klasse family and to be engineered as an EV from the outset. That should allow a longer wheelbase and smarter use of cabin space, although dropping the fixed roof calls for a reinforced body. The extra hardware adds mass, so the figures quoted for the BMW i3 sedan cannot be carried over directly to the future convertible.

The new i3 officially comes with an 800-volt architecture, a battery built around Gen6 cylindrical cells, charging at up to 400 kW and a preliminary WLTP range of up to 900 km. Ten minutes at a fast charger are enough to put roughly 400 km back into the pack. Cell energy density, BMW says, has grown by more than 20% over the previous generation.

Even with the same battery, the i4 Convertible is likely to use more energy than the sedan: the reinforced structure, the less favourable aerodynamics of an open-top body and the extra mass all take their toll. Boot space will shrink as well, because the folding mechanism for the soft top eats into the volume.

BMWBLOG claims the electric convertible will be built alongside the petrol BMW 4 Series Convertible of the G23 generation, whose production, according to the same sources, runs until mid-2029. BMW has never confirmed those timings.

The current i4 Gran Coupé is still in the range and picked up another round of equipment updates in the summer of 2026, but according to BMWBLOG it leaves production as early as next year. After that the i4 badge goes on hiatus — right up to 2028.

Pricing, drivetrain variants, battery capacity and the opening of order books all remain unknown.