BMW 4 series is a variety of models of coupe and convertible, fastback that are being produced since 2013. Series itself were created as a replacement for E92/E93 coupe and convertible vehicles of 3 series 5 generation. Models are characterized as a vehicles that has robust, aggresive design but also it has good technical characteristics and powerful engine.  Facelift was introduced in 2017. The most powerful car of 4 series is called M4 and it comes as a coupe or convertible model.