The BMW M6 (E63) is a high performance coupé variant of the E63/E64 BMW 6 Series and the successor to the BMW M635CSi and 850CSi. It is powered by a S85 V10, BMW's first V10 engine for their production cars, which was also used in the E60 M5. The most noticeable traits of the M6's exterior are the carbon-fibre roof and five spoke wheels. Until the car's production end in 2010, over 14,000 exemplars were sold.