The 2018 BMW 340 is available as a 4-door, 5-seat sedan. Starting at $48,950, the 2018 BMW 340 RWD is powered by a 3.0L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 32-mpg on the highway. The top of the line 2018 BMW 340 w/South Africa AWD, priced at $50,950, is powered by a 3.0L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 31-mpg on the highway.