The 2022 BMW M340 is available as a 4-door, 5-seat sedan. Starting at $54,700, the 2022 BMW M340 RWD is powered by a 3.0LL , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 23-mpg in the city and 32-mpg on the highway. The top of the line 2022BMWM340(NA) AWD , priced at $ 56,700 , is powered by a 3.0LL , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 23-mpg in the city and 32-mpg on the highway.