The BMW 4 Series Convertible is an open-top variant of the BMW 4 Series, produced by the German manufacturer BMW. Designed to combine sporty driving dynamics with open-air motoring, the Convertible version features a retractable roof system while maintaining the performance characteristics of the 4 Series lineup.

Depending on generation, the model has been equipped with either a folding hardtop or a fabric soft-top roof. It typically seats four passengers and is powered by turbocharged four- or six-cylinder gasoline engines, with performance-focused variants available under BMW’s M division. Rear-wheel drive is standard, with all-wheel drive offered in select configurations.

The BMW 4 Series Convertible incorporates modern digital instrumentation, infotainment systems, and driver-assistance technologies. It is positioned within the premium convertible segment, offering a balance of dynamic handling, comfort, and the versatility of open-top driving.