DecodedCars2006 Infiniti QX56
Trims, performance, features, fuel economy, safety and known problems — with the pros and cons against similar 2006 models.
- Class
- Sport Utility Vehicle - 2WD
- Body styles
- 4dr SUV 4X4
- Engines
- 5.6L 8-cyl
- Drivetrain
- Rear-Wheel Drive, 4-Wheel or All-Wheel Drive
- Fuel
- Regular Gasoline
- MPG (best)
- 14 combined · 12 city / 18 hwy
- Length
- 207.5 in
- Curb weight
- 5,662 lb
- NHTSA rating
- Not rated
- Recalls
- 2 campaigns
Pros & cons
What's good
- AWD / 4WD available
Watch out for
- Below-average fuel economyBest version gets 14 MPG combined, 23% below the 2006 SUV - average of 18.3 MPG.
Calculated from EPA, NHTSA and vPIC data against 5 similar 2006 models — not a review. How we calculate this →
Overview
The 2006 Infiniti QX56 is a SUV - offered with a 5.6L 8-cyl engine and rear-wheel drive and 4-wheel or all-wheel drive.
It measures about 208 inches long and 79 inches wide on a 124-inch wheelbase, with a curb weight of roughly 5,662 lb.
EPA rates its most efficient version at 14 MPG combined (12 city / 18 highway), 23% worse than the 2006 SUV - average of 18.3 MPG, for an estimated $4,800 a year in fuel.
It has 2 recall campaigns on file and owners have filed 35 complaints with NHTSA since 2015, most often about the service brakes.
What changed for 2006
No changes to engines, powertrains, drivetrains, size, EPA ratings or NHTSA crash rating compared with the 2005 QX56 — a carry-over year in the data.
Compared with 2005; trim, feature and price changes aren't covered. See the 2005 QX56 →
Dimensions & weight
| Body | Length | Width | Height | Wheelbase | Track F / R | Curb weight | Weight F/R |
|---|---|---|---|---|---|---|---|
| 4dr SUV 4X4 | 207.5 in | 78.7 in | 78.7 in | 123.6 in | 66.9 / 66.9 in | 5,662 lb | 52/48 |
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 |
|---|---|---|---|---|---|---|---|
| QX56 2WD | 5.6L 8-cyl | Automatic 5-spd | Rear-Wheel Drive | 12 / 18 / 14 | -23% | $4,800 | 635 |
| QX56 4WD | 5.6L 8-cyl | Automatic 5-spd | 4-Wheel or All-Wheel Drive | 12 / 17 / 14 | -18% | $4,800 | 635 |
EPA estimates; "vs. class" is combined MPG against the 2006 EPA class average. How we calculate this →
Safety ratings & technology
NHTSA has not published 5-Star ratings for the 2006 Infiniti QX56 under the current (2011+) test program.
Similar 2006 SUV -s
| Model | Best MPG / range | NHTSA overall | Recalls |
|---|---|---|---|
| 2006 Infiniti QX56 (this car) | 14 MPG | Not rated | 2 |
| 2006 Mercedes-Benz G-Class | 12 MPG | Not rated | 0 |
| 2006 Cadillac Escalade | 14 MPG | Not rated | 0 |
| 2006 Lincoln Navigator | 13 MPG | Not rated | 0 |
| 2006 Mercedes-Benz ML-Class | 16 MPG | Not rated | 0 |
| 2006 Mercedes-Benz R-Class | 16 MPG | Not rated | 0 |
Recalls (2)
Engine And Engine Cooling · Oct 28, 2010
NHTSA campaign 10V517000 · 747,480 vehicles
- Problem
- NISSAN IS RECALLING CERTAIN MODEL YEAR 2004-2006 ARMADA, TITAN, INFINITI QX56 AND MODEL YEAR 2005-2006 FRONTIER, PATHFINDER AND XTERRA VEHICLES. THE INTELLIGENT POWER DISTRIBUTION MODULE (IPDM) ASSEMBLY CONTAINS AN ENGINE CONTROL MODULE (ECM) RELAY THAT HAS A DIODE FOR ELECTRICAL CURRENT NOISE REDUCTION. THE ECM RELAY MAY ALLOW SILICON VAPOR TO FORM AND, OVER TIME, THE SILICON EVAPORATES FROM THE DIODE MOLDING WHICH CAUSES SILICON OXIDE TO DEVELOP ON THE ECM RELAY CONTACT DUE TO ARCING.
- Risk
- THIS COULD CAUSE ENGINE STALLING INCREASING THE RISK OF A CRASH.
- Fix
- DEALERS WILL REPLACE THE ECM RELAY INSIDE THE IPDM ASSEMBLY. THIS SERVICE WILL BE PERFORMED FREE OF CHARGE. THE SAFETY RECALL BEGAN ON DECEMBER 6, 2010. OWNERS MAY CONTACT NISSAN AT 1-800-647-7261.
Fuel System, Other › Storage › Fuel Gauge System · Mar 3, 2010
NHTSA campaign 10V074000 · 340,000 vehicles
- Problem
- NISSAN IS RECALLING CERTAIN MODEL YEAR 2005-2009 TITAN, ARMADA, AND INFINITI QX56 VEHICLES. THE INSTRUMENT PANEL FUEL GAUGE MAY INACCURATELY DISPLAY THAT THE VEHICLE STILL HAS SOME FUEL, TYPICALLY ABOUT ONE QUARTER TANK, WHEN THE FUEL TANK IS EMPTY.
- Risk
- THIS COULD CAUSE THE VEHICLE TO RUN OUT OF GAS AND STALL ON THE HIGHWAY, WHICH COULD CAUSE A CRASH.
- Fix
- DEALERS WILL REPLACE THE FUEL SENDER UNIT INSIDE THE FUEL TANK WITH A NEW IMPROVED SENDER CARD. THIS SERVICE WILL BE PERFORMED FREE OF CHARGE. THE SAFETY RECALL BEGAN ON MARCH 22, 2010. OWNERS MAY CONTACT NISSAN AT 1-800-647-7261.
Not every 2006 Infiniti QX56 is affected — only a VIN check confirms your car.
Owner-reported problems
Unverified owner reports; best-sellers collect more.
Used 2006 Infiniti QX56 buyer's checklist
- Run the VIN at nhtsa.gov/recalls. 2 recalls this year — ask for proof of repairs.
- Service Brakes — 21 owner reports. Brake firmly from speed; check for pulling, pulsing pedal or ABS warning light.
- Electrical System — 6 owner reports. Test every window, lock, light, screen and USB port; check the battery age.
- Engine — 5 owner reports. Cold-start the engine, listen for knocking, and watch for warning lights or hesitation on acceleration.
- Mileage to watch. Owners typically reported problems around 123,500 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 2006 Infiniti QX56. Not a substitute for a professional inspection.
Other QX56 years
Compare all years →Sources: EPA, NHTSA, Transport Canada, Wikimedia Commons. Not affiliated with NHTSA, the EPA or Infiniti. How we calculate this →