The 1999 BMW M3 is available as a 2-door, 5-seat coupe. Starting at $39,700, the 1999 BMW M3 Coupe is powered by a 3.2L , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 19-mpg in the city and 26-mpg on the highway. The top of the line 1999BMWM3(A5) Convertible , priced at $ 45,900 , is powered by a 3.2L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 25-mpg on the highway.