BMW M3 sedan and M4 Coupe

BMW debuted this M4 concept coupe during Monterey Car Week. The car is nearly identical to the production M4, which probably will show up at the 2014 Detroit Auto Show in January.   (David Undercoffler / Los Angeles Times)

BMW debuted this M4 concept coupe during Monterey Car Week. The car is nearly identical to the production M4, which probably will show up at the 2014 Detroit Auto Show in January.   (David Undercoffler / Los Angeles Times)

BMW debuted this M4 concept coupe during Monterey Car Week. The car is nearly identical to the production M4, which probably will show up at the 2014 Detroit Auto Show in January.   (David Undercoffler / Los Angeles Times)

BMW debuted this M4 concept coupe during Monterey Car Week. The car is nearly identical to the production M4, which probably will show up at the 2014 Detroit Auto Show in January.   (David Undercoffler / Los Angeles Times)

BMW debuted this M4 concept coupe during Monterey Car Week. The car is nearly identical to the production M4, which probably will show up at the 2014 Detroit Auto Show in January.   (David Undercoffler / Los Angeles Times)

BMW debuted this M4 concept coupe during Monterey Car Week. The car is nearly identical to the production M4, which probably will show up at the 2014 Detroit Auto Show in January.   (David Undercoffler / Los Angeles Times)

BMW debuted this M4 concept coupe during Monterey Car Week. The car is nearly identical to the production M4, which probably will show up at the 2014 Detroit Auto Show in January.   (David Undercoffler / Los Angeles Times)

BMW debuted this M4 concept coupe during Monterey Car Week. The car is nearly identical to the production M4, which probably will show up at the 2014 Detroit Auto Show in January.   (David Undercoffler / Los Angeles Times)