The 2008 Mazda B-Series compact truck comes in two body styles: regular cab and extended cab (which features a pair of smaller doors to access the rear compartment). No crew cab style is offered.

There are two trim levels: base B2300, base B4000 and B4000 SE. The numbers indicate engine displacement (e.g., 2300 means 2.3 liters). The B2300 comes only as a two-wheel-drive regular cab, while the B4000 comes only as a four-wheel-drive extended cab. Standard equipment includes a sliding rear window, AM/FM stereo, air-conditioning (on B4000) and 15-inch steel wheels (16-inch on B4000).

The B4000 SE features foglights, skid plates, a limited-slip differential, 16-inch alloy wheels, upgraded upholstery, cruise control and a bedliner. Many of these features are available as options on the less expensive models.