2003 Infiniti Q45
The Verdict
Worst problem area
Engine
Engine leads by volume: 7 of 12 complaints (58%) mention it. Complaints mentioning Brakes include more reported injuries (1) than those mentioning any other identified area.
Complaints filed fell from 20 in 2002 to 12 in 2003.
Data last changed . Sources: NHTSA complaints and recalls, EPA fuel economy data. Methodology
Cost, Fuel Economy & Complaint History
| Category | 2001 | 2002 | 2003 | 2004 | 2005 | vs. 2003 Large Cars |
|---|---|---|---|---|---|---|
| Annual fuel cost ($) | 4,300 | 4,300 | 4,300 | 4,300 | 4,300 | |
| Combined MPG | 18 | 18 | 18 | 18 | 18 | |
| City / Highway MPG | 16 / 21 | 16 / 23 | 16 / 22 | 16 / 22 | 16 / 22 | |
| CO₂ tailpipe (g/mi) | 494 | 494 | 494 | 494 | 494 | |
| Complaints filed | 5 | 20 | 12 | 7 | 4 | |
| Recalls issued | 1 | 1 | 1 | 2 | 3 | |
| Crash-involved complaints | 1 | 1 | 1 | 0 | 1 | |
| Fire-involved complaints | 0 | 0 | 0 | 0 | 0 | |
| Injuries reported | 0 | 1 | 1 | 0 | 1 | |
| Deaths reported | 0 | 0 | 0 | 0 | 0 | |
| Configurations compared | 1 | 1 | 1 | 1 | 1 |
Not compared: this database has no vehicle sales or registration figures, so a raw count mostly reflects how many were sold, not how safe the vehicle is.
Common questions
How many recalls does the 2003 Infiniti Q45 have?
1 NHTSA recall campaign as of Sep 16, 2026. Check your VIN with NHTSA to see whether one applies to your car.
What is the most common complaint about the 2003 Infiniti Q45?
Engine: 7 of 12 NHTSA complaints (58%) mention it.
What gas mileage does the 2003 Infiniti Q45 get?
EPA rates it 18 MPG combined.
How much does it cost to fuel a 2003 Infiniti Q45?
EPA estimates $4,300 a year in fuel costs, using EPA's assumptions.
Similar Vehicles
EPA-Rated Configurations (1)
| Configuration | Transmission | Cylinders | Displacement | Drivetrain | Fuel Type | Vehicle Class | City | Highway | Combined | Annual Fuel Cost | CO₂ |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Configuration 1 | Automatic (S5) | 8 | 4.5L | Rear-Wheel Drive | Premium | Large Cars | 16 mpg | 22 mpg | 18 mpg | $4,300 | 494 g/mi |
Complaints by Category
| Category | Complaints | Crash-Involved | Fire-Involved | Injuries | Deaths |
|---|---|---|---|---|---|
| Engine | 7 | 0 | 0 | 0 | 0 |
| Transmission & Drivetrain | 1 | 0 | 0 | 0 | 0 |
| Fuel System | 0 | 0 | 0 | 0 | 0 |
| Electrical | 3 | 0 | 0 | 0 | 0 |
| Brakes | 3 | 1 | 0 | 1 | 0 |
| Steering | 3 | 0 | 0 | 0 | 0 |
| Suspension, Wheels & Tires | 0 | 0 | 0 | 0 | 0 |
| Airbags & Restraints | 1 | 0 | 0 | 0 | 0 |
| Driver Assistance & Speed Control | 1 | 0 | 0 | 0 | 0 |
| Body, Seats & Latches | 0 | 0 | 0 | 0 | 0 |
| Visibility & Lighting | 0 | 0 | 0 | 0 | 0 |
| Other | 0 | 0 | 0 | 0 | 0 |
A complaint that names more than one category is counted in each, so the rows can add up to more than the total number of complaints.
Recalls (1)
AIR BAGS:SIDE/WINDOW · Campaign 12V079000 · Feb 29, 2012
Defect: NISSAN IS RECALLING CERTAIN MODEL YEAR 2003-2005 INFINITI Q45 VEHICLES. A WIRING CONNECTOR FOR THE SEAT MOUNTED AIRBAG MAY EXPERIENCE INCREASED ELECTRICAL RESISTANCE, RESULTING IN THE NON-DEPLOYMENT OF THE SIDE AIR BAGS.
Consequence: NON-DEPLOYMENT OF SIDE AIR BAGS COULD INCREASE THE RISK OF PERSONAL INJURY.
Remedy: NISSAN WILL NOTIFY OWNERS, AND DEALERS WILL MODIFY THE WIRING CONNECTOR, FREE OF CHARGE. THE SAFETY RECALL BEGAN ON MARCH 19, 2012. OWNERS MAY CONTACT NISSAN CUSTOMER SERVICE AT 1-800-647-7261.