Production of the current E92 M3 Coupe will end in the middle of next year, and its successor is expected in 2014 boasting a model name change. Similar to Audi
's A4 sedan and A5 coupe, BMW
will differentiate the coupe and sedan by giving the former the M4 moniker, while the latter will retain the title of M3. Given the M3 coupe came before the sedan, you would have thought the high-performance 4-door would have adopted the new name; you'll have to ask BMW for their reasons.