DecodedCars2005 Infiniti Q45
Trims, performance, features, fuel economy, safety and known problems — with the pros and cons against similar 2005 models.
- Class
- Midsize Cars
- Body styles
- 4dr Sport/Premium
- Engines
- 4.5L 8-cyl
- Drivetrain
- Rear-Wheel Drive
- Fuel
- Premium Gasoline
- MPG (best)
- 18 combined · 16 city / 22 hwy
- Length
- 201.6 in
- Curb weight
- 3,845 lb
- NHTSA rating
- Not rated
- Recalls
- 1 campaign
Pros & cons
What's good
Nothing stands out against similar models in the data.
Watch out for
- Below-average fuel economyBest version gets 18 MPG combined, 13% below the 2005 midsize car average of 20.6 MPG.
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
Calculated from EPA, NHTSA and vPIC data against 10 similar 2005 models — not a review. How we calculate this →
Overview
The 2005 Infiniti Q45 is a midsize car offered with a 4.5L 8-cyl engine and rear-wheel drive.
It measures about 202 inches long and 72 inches wide on a 113-inch wheelbase, with a curb weight of roughly 3,845 lb.
EPA rates its most efficient version at 18 MPG combined (16 city / 22 highway), 13% worse than the 2005 midsize car average of 20.6 MPG, for an estimated $4,550 a year in fuel.
It has 1 recall campaign on file and owners have filed 1 complaint with NHTSA since 2015, most often about the vehicle speed control.
Dimensions & weight
| Body | Length | Width | Height | Wheelbase | Track F / R | Curb weight | Weight F/R |
|---|---|---|---|---|---|---|---|
| 4dr Sport/Premium | 201.6 in | 72.4 in | 58.7 in | 113 in | 61.8 / 61.4 in | 3,845 lb | 53/47 |
Transport Canada CVS (Open Government Licence – Canada), Canadian-market figures.
Will it fit your garage? Check with your measurements →Engines, MPG & running costs
| Version | Engine | Transmission | Drive | City / Hwy / Comb | vs. class | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|---|---|
| Q45 | 4.5L 8-cyl | Automatic (S5) | Rear-Wheel Drive | 16 / 22 / 18 | -13% | $4,550 | 494 |
EPA estimates; "vs. class" is combined MPG against the 2005 EPA class average. How we calculate this →
Safety ratings & technology
NHTSA has not published 5-Star ratings for the 2005 Infiniti Q45 under the current (2011+) test program.
Similar 2005 midsize cars
| Model | Best MPG / range | NHTSA overall | Recalls |
|---|---|---|---|
| 2005 Infiniti Q45 (this car) | 18 MPG | Not rated | 1 |
| 2005 BMW 5 Series | 21 MPG | Not rated | 2 |
| 2005 Mercedes-Benz E-Class | 27 MPG | Not rated | 0 |
| 2005 Audi A6 | 19 MPG | Not rated | 3 |
| 2005 Lexus LS | 18 MPG | Not rated | 0 |
| 2005 Jaguar XJ | 19 MPG | Not rated | 0 |
| 2005 Maserati Quattroporte | 12 MPG | Not rated | 1 |
Recalls (1)
Air Bags › Side/Window · Feb 28, 2012
NHTSA campaign 12V079000 · 1,349 vehicles
- Problem
- 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.
- Risk
- NON-DEPLOYMENT OF SIDE AIR BAGS COULD INCREASE THE RISK OF PERSONAL INJURY.
- Fix
- 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.
Not every 2005 Infiniti Q45 is affected — only a VIN check confirms your car.
Owner-reported problems
Unverified owner reports; best-sellers collect more.
Used 2005 Infiniti Q45 buyer's checklist
- Run the VIN at nhtsa.gov/recalls. 1 recall this year — ask for proof of repairs.
- Vehicle Speed Control — 1 owner reports. Ask the seller and mechanic specifically about this system.
- Mileage to watch. Owners typically reported problems around 87,000 miles; ask what was repaired near that point.
- Before you pay: service records, a history report and an independent inspection.
Generated by DecodedCars from NHTSA recalls and owner complaints for the 2005 Infiniti Q45. Not a substitute for a professional inspection.
Other Q45 years
Compare all years →| Year | MPG (best) | Length | Overall | Recalls | Complaints |
|---|---|---|---|---|---|
| 2006 Q45 | 18 | 201.6 in | Not rated | 0 | 0 |
Sources: EPA, NHTSA, Transport Canada, Wikimedia Commons. Not affiliated with NHTSA, the EPA or Infiniti. How we calculate this →