The 2003 Mazda B3000 is available as a 2-door, 3-seat regular side. Starting at $18,885, the 2003 Mazda B3000 (M5) Cab Plus is powered by a 3.0L , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 19-mpg in the city and 23-mpg on the highway. The top of the line 2003MazdaB3000(A5) Cab Plus 4 , priced at $ 20,215 , is powered by a 3.0L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 22-mpg on the highway.