BMW M4 is a version of the BMW 4 Series car developed by the BMW motorsport division, BMW M, which has been produced since 2014. As part of the change in numbering, which divides the coupe and convertible variants of the 3rd series into the 4th series. M4 replaced these variants of the BMW M3 . The upgrade compared to the standard BMW 4 Series includes an upgraded engine, suspension, exhaust system, brakes and weight reduction measures, including the wider use of carbon fibre, for example, on the roof of the car.