Comparatively upright in profile, the Mazda3 is built with a wide track and a relatively long (103.9-inch) wheelbase for its size. A Sport Package that includes sport bumpers, side skirts, 17-inch wheels and fog lamps is available on s sedans and standard on s hatchbacks.

Steel wheels hold 15-inch tires on the Mazda3 i sedan; the Mazda3 s sedan gets 16-inch alloy wheels, while the Mazda3 s hatchback rolls on 17-inch rubber. The wagonlike hatchback has small triangular rear quarter windows. Sedans get a short but high rear deck.