- Newest year: 2003
- Gas
- Standard SUVs
2001-2003 Infiniti QX4 MPG & Fuel Cost
3 model years · 15–16 MPG combined
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 4 of 10 standard SUV configurations, MY2003. Ranked against all rated configurations, not sales-weighted.
2001-2003 Infiniti QX4 at a glance
The 2001-2003 Infiniti QX4 covers 3 model years in the EPA database (6 configurations in all), rated 15–16 MPG combined. The newest model year, 2003, costs about $4,080 a year to fuel for its most efficient version, the QX4 3.5L 6-cyl RWD (16 MPG), at regular gasoline $4.36/gal (U.S. average, Sep 2026). EPA changed the ratings in 2002 and 2003. The best combined rating in the generation, 16 MPG, was reached in 2003.
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
2001-2003 Infiniti QX4 by model year
What the 2003 QX4 3.5L 6-cyl RWD costs to drive
Per month
$340
$4,080 a year ÷ 12
Per 25 miles
$6.80
Per 100 miles
$27.20
Five years
$20,400
5 × the yearly cost, prices held at today's level
vs the standard SUV median
Same
Class median $4,080 a year, MY2003
Based on 15,000 miles a year and regular gasoline $4.36/gal (U.S. average, Sep 2026).
2003 Infiniti QX4 MPG
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Versus 2002: The most efficient configuration moves from 15 to 16 MPG, up 1. Its annual cost goes from $4,360 to $4,080, $280 less.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| QX4 3.5L 6-cyl RWD (Most efficient) | 3.5L 6-cyl | RWD | 14 | 19 | 16 | $4,080 |
| QX4 3.5L 6-cyl 4WD | 3.5L 6-cyl | 4WD | 14 | 18 | 15 | $4,360 |
2002 Infiniti QX4 MPG
15 MPG · $4,360/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Versus 2001: The most efficient configuration stays at 15 MPG. Its annual cost stays at $4,360.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| QX4 3.5L 6-cyl RWD (Most efficient) | 3.5L 6-cyl | RWD | 14 | 18 | 15 | $4,360 |
| QX4 3.5L 6-cyl 4WD | 3.5L 6-cyl | 4WD | 13 | 17 | 15 | $4,360 |
2001 Infiniti QX4 MPG
15 MPG · $4,360/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| QX4 3.5L 6-cyl RWD (Most efficient) | 3.5L 6-cyl | RWD | 14 | 18 | 15 | $4,360 |
| QX4 3.5L 6-cyl 4WD | 3.5L 6-cyl | 4WD | 14 | 17 | 15 | $4,360 |
Fuel cost by state
Yearly cost of the QX4 3.5L 6-cyl RWD: $5,550 in California and $3,560 in Texas, a $1,990 difference.
- California $5,550
- Washington $5,150
- New York $4,080
- Florida $3,860
- Texas $3,560
Similar cars
Closest combined MPG among MY2003 standard SUV models.
Generations
- 2000
- 2001-2003
Frequently asked questions
What gas mileage does the 2001-2003 Infiniti QX4 get?
EPA rates the 2001-2003 Infiniti QX4 at 15–16 MPG combined across 6 configurations and 3 model years. The most efficient version, the 2003 QX4 3.5L 6-cyl RWD, is rated 16 MPG (14 city, 19 highway).
Which years had the best MPG in the 2001-2003 Infiniti QX4?
The QX4 3.5L 6-cyl RWD reached the generation's best combined rating, 16 MPG, in 2003. The lowest top rating, 15 MPG, was in 2001 and 2002.
Did EPA ratings change during the 2001-2003 Infiniti QX4?
Yes. Ratings changed in 2002 and 2003.
How does the 2001-2003 Infiniti QX4 compare with the previous generation?
The previous generation (2000 Infiniti QX4) is rated 15 MPG combined and costs $4,360 a year to fuel; the 2001-2003 model is rated 15–16 MPG and costs $4,080–$4,360 a year.
How much does it cost to fuel a 2003 Infiniti QX4 per year?
Driving 15,000 miles a year at regular gasoline $4.36/gal (U.S. average, Sep 2026), the QX4 3.5L 6-cyl RWD costs about $4,080 a year. Across all 2 configurations the cost runs $4,080–$4,360 a year. That is a $280 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2003 Infiniti QX4 100 miles?
About $27.20 per 100 miles for the QX4 3.5L 6-cyl RWD at regular gasoline $4.36/gal (U.S. average, Sep 2026), and between $27.20 and $29.07 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2003 Infiniti QX4 more efficient in the city or on the highway?
The QX4 3.5L 6-cyl RWD is rated 14 city and 19 highway MPG, so it is more efficient on the highway, by 5 MPG.
How does the 2003 Infiniti QX4 compare with other standard SUV configurations?
The QX4 3.5L 6-cyl RWD costs about $4,080 a year to fuel, the same as the class median of $4,080, and less than 4 of 10 standard SUV configurations. The comparison covers all 248 rated standard SUV configurations for MY2003, not weighted by sales.
Is the 2003 Infiniti QX4 different from the 2002 model?
The most efficient configuration moves from 15 to 16 MPG, up 1. Its annual cost goes from $4,360 to $4,080, $280 less. EPA lists 2 configurations for 2003 against 2 configurations for 2002. See the 2002 Infiniti QX4 for that year.