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2003 Infiniti

Q45

Auto (S5), 8 cyl, 4.5 L

Infiniti Q45: best and worst years

Overview

Body
Midsize CarsEPA, from EPA, last updated 6/22/2026
Drivetrain
Rear-Wheel DriveEPA, from EPA, last updated 6/22/2026
Transmission
Automatic (S5)EPA, from EPA, last updated 6/22/2026
Powertrain
GasEPA, from EPA, last updated 6/22/2026
Fuel
PremiumEPA, from EPA, last updated 6/22/2026

Engine & performance

Cyl
8EPA, from EPA, last updated 6/22/2026
Aspiration
Naturally aspiratedEPA, from EPA, last updated 6/22/2026

Efficiency

MPG Hwy
22 mpgEPA, from EPA, last updated 6/22/2026
MPG City
16 mpgEPA, from EPA, last updated 6/22/2026
MPG Comb
18 mpgEPA, from EPA, last updated 6/22/2026
Fuel $/yr
$4,300EPA, from EPA, last updated 6/22/2026
Elec. Range
0 miEPA, from EPA, last updated 6/22/2026

Dimensions & capacity

Pass. Vol
107 ft³EPA, from EPA, last updated 6/22/2026
Cargo Vol
14 ft³EPA, from EPA, last updated 6/22/2026

Warranty manufacturer terms, by make

Basic
4 yr / 60k mi
Powertrain
6 yr / 70k mi
Roadside assistance
4 yr
Maintenance
3 yr

Information is gathered on a best-effort basis from public sources, may be incomplete or out of date, and is not purchasing or financial advice. Verify with the manufacturer or dealer before buying.

2003 Infiniti Q45 Auto (S5), 8 cyl, 4.5 L · Trimslate