The 2006 Mazda Mazda3 is available as a 4-door, 5-seat sedan. Starting at $13,710, the 2006 Mazda Mazda3 i (M5) Sedan is powered by a 2.0L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 28-mpg in the city and 35-mpg on the highway. The top of the line 2006MazdaMazda3Grand Touring (A5) Hatchback , priced at $ 20,115 , is powered by a 2.3L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 25-mpg in the city and 31-mpg on the highway.