2003 MazdaB4000 4WD

Standard Pickup Trucks 4WD · 4-Wheel or All-Wheel Drive · 4.0 L 6-cyl

15MPGcombined

14city

17highway

A year of fuel$4,450

CO₂ from the tailpipe592.5 g/mi

Figures from the EPA label (fueleconomy.gov), the same as on the car's window sticker.

See it on fueleconomy.gov

Against the 1,156 mazda cars

Combined MPG 15 MPGbest 38 · avg 23

Annual fuel cost $4,450best $850 · avg $3,163

Bars are scaled to the best in the list; the mark shows the list average. Lower is better for fuel cost; higher is better for the rest. All figures are the EPA's.

Summary

The 2003 Mazda B4000 4WD is a gasoline pickup with four-wheel or all-wheel drive, classified by the EPA as a Standard Pickup Truck 4WD. Its 4.0 L 6-cylinder engine is paired with a 5-speed manual transmission. The listed EPA fuel economy is 14 MPG in the city, 17 MPG on the highway and 15 MPG combined. Annual fuel cost is $4,450, and tailpipe CO2 emissions are 592.47 grams per mile. The B4000 belongs to Mazda’s B Pickup family. For buyers comparing pickup running costs, the MPG ratings and annual fuel-cost figure provide direct measures of gasoline use, while the CO2 figure adds an emissions measure. The body, drive layout and transmission identify the configuration represented by these figures.

Who it is for

This pickup may fit shoppers seeking a gasoline-powered truck with four-wheel or all-wheel drive and a manual transmission. Its MPG and annual fuel-cost figures are useful for considering running costs.

What is good

Pickup body with four-wheel or all-wheel drive
4.0 L 6-cylinder engine
5-speed manual transmission
17 MPG highway rating

What to know first

14 MPG city rating
EPA annual fuel cost is $4,450
Tailpipe CO2 is 592.47 g per mile

CarCody review

2003 Mazda B4000 4WD: the full review

The B4000 4WD pairs a 4.0 L engine with a manual transmission and four-wheel or all-wheel drive. Its 15 MPG combined rating and $4,450 annual fuel cost are key figures to weigh.

Overview

The 2003 Mazda B4000 4WD is a gasoline-powered pickup in Mazda’s B Pickup family. Its EPA classification is Standard Pickup Trucks 4WD, and its listed drivetrain is four-wheel or all-wheel drive. Power comes from a 4.0-liter six-cylinder engine paired with a five-speed manual transmission.

Fuel economy is 14 MPG in city driving and 17 MPG on the highway, for a combined rating of 15 MPG. The EPA-listed annual fuel cost is $4,450, and tailpipe carbon dioxide emissions are 592.47 grams per mile. Those figures put fuel use and emissions at the center of any ownership-cost assessment.

Key features

Powertrain and classification

4.0-liter six-cylinder gasoline engine
Five-speed manual transmission
Four-wheel or all-wheel drive
Standard Pickup Trucks 4WD EPA class

Fuel economy and emissions

The B4000 4WD’s combined EPA rating is 15 MPG, with a three-MPG difference between its 14 MPG city figure and 17 MPG highway figure. Its official annual fuel-cost estimate is $4,450. The listed tailpipe CO2 rate is 592.47 grams per mile.

Who it's for

This pickup is most relevant to buyers considering a gasoline 4WD truck with a manual transmission and a six-cylinder engine. Its fuel economy figures also matter to buyers comparing day-to-day running costs: the official annual fuel-cost estimate is substantial, and the city rating is lower than the highway rating. Drivers whose priorities include fuel efficiency or lower tailpipe CO2 may want to weigh those figures carefully against their needs.

For businesses comparing vehicles for a fleet, the same EPA numbers offer a consistent starting point for fuel-cost planning. The figures do not describe every owner’s actual costs, so individual use can affect the budget.

Pros and cons

Pros: Four-wheel or all-wheel drive, a 4.0-liter six-cylinder engine, and a five-speed manual transmission are clearly specified in the listing.
Cons: The combined rating is 15 MPG, and the official annual fuel-cost estimate is $4,450. Tailpipe CO2 is listed at 592.47 grams per mile.

Alternatives

For a broader view of the marque, browse Mazda cars. The listed alternatives are newer Mazda models from different vehicle lines, rather than direct B4000 replacements: the 2026 Mazda CX-30 4WD and several Mazda 3 configurations, including the 2026 Mazda 3 4-Door 2WD, 2026 Mazda 3 4-Door 4WD, and 2026 Mazda 3 5-Door 2WD. They provide other Mazda options to consider, but the available details here do not support a direct comparison of their fuel economy or costs with the B4000.

Verdict

The 2003 Mazda B4000 4WD has a straightforward listed specification: a 4.0-liter gasoline six-cylinder, five-speed manual, and four-wheel or all-wheel drive. Its EPA fuel economy is 14 MPG city, 17 MPG highway, and 15 MPG combined. The $4,450 annual fuel-cost estimate and 592.47-gram-per-mile tailpipe CO2 figure are important tradeoffs for buyers and fleet planners to consider alongside the truck’s drivetrain and body type.