Used 2006 INFINITI Q45

List Price Estimate
$3,953 - $8,049

Pros & Cons

  • Elegant and spacious interior, long list of standard luxury features, strong V8, excellent value.
  • Unnecessarily complex interior controls, small trunk capacity, not as athletic as some competitors.

Edmunds' Expert Review

Fast, luxurious and priced thousands of dollars less than most peers, the Q is a solid buy for comfort seekers with an eye on the bottom line. But if owning the best is what matters to you, drive the competition first.

Vehicle overview

The Q45 was introduced in 1989, along with the Infiniti nameplate, and was heralded as an alternative to Germany's finest. Indeed, it was a luxury car geared toward the driver, with a promise of performance and driving pleasure over opulence. As sales numbers dwindled over the years, the Q45 was redesigned and battled the Bavarians once again between 1994 and 1997, but with an emphasis on comfort over sporting capability.

For the 2002 model year, Infiniti completely redesigned its flagship with a partial return to its athletic roots. The heart of this full-size luxury sedan is a specially designed 4.5-liter V8 bursting with 340 horsepower and 333 pound-feet of torque. These kinds of numbers put the Q in good company alongside the offerings from Audi, BMW, Jaguar, Lexus and Mercedes-Benz. A standard adaptive suspension with driver-selectable modes allows owners to tailor the ride for a higher level of body control around corners or maximum comfort on the highway. Although the Q is certainly comfortable for long-distance travel, it's no match for competitors like the Audi A8, BMW 7 Series and Acura RL when the road turns twisty.

The interior of the Q is airy, light and spacious. Furnished with copious amounts of wood, brushed aluminum accents, leather and a simple instrument cluster, Infiniti presents the driver and passengers with an elegant interior. Passenger room is ample throughout. The power-adjustable driver seat never ceases to provide comfort and support, and the power-adjustable tilt/telescoping wheel accommodates various driver postures with ease. Unfortunately, many of the Q's features are controlled by a joystick that is simple in principle but difficult to use in practical situations. If the Q were the only luxury sedan you ever drove, you would never miss a thing. But if owning the best of what's around matters, make sure you drive the competition first.

INFINITI Q45 models

The 2006 Infiniti Q45 sedan originally debuted with two trim levels, base and Sport. The base Q, which was discontinued midway through the year, comes with 17-inch alloy wheels, an adaptive suspension with driver-selectable settings, a powerful set of HID headlights, a DVD-based navigation system, a 10-way power driver seat and eight-way power front-passenger seat, front seat heaters, leather upholstery, genuine wood trim, a sunroof, a voice recognition system for various controls, rain-sensing wipers, a rearview backup camera, a 300-watt Bose stereo, an in-dash CD changer and satellite radio. The Sport adds rear active steer, sport suspension and 19-inch alloy wheels. Available only on the base Q45, the Premium Package provides 18-inch wheels, adaptive cruise control, heated and cooled front seats, power-adjustable and heated rear seats, rear air conditioning controls and a power-operated rear-window shade along with manual shades for the side windows. This package also includes a Lane Departure Warning System (LDW), which works to alert the driver to any unintended movement of the vehicle out of a designated traffic lane.

2006 Highlights

The Infiniti Q45 heads into 2006 with a new Sport variant. This version of the Q includes an active rear-steer system, a more sport-oriented suspension tune and 19-inch alloy wheels. The active-steer system monitors vehicle speed and steering input and uses motor-driven control to automatically adjust the rear suspension geometry to improve handling performance. Other changes to the Q45 this year include a revised five-speed automatic transmission (wider gear spacing and a downshift rev-matching feature), standard Bluetooth connectivity and the addition of a lane departure warning system to the optional Premium Package.

Performance & mpg

The rear-drive Q45 is powered by a 4.5-liter V8 that produces 340 hp and 333 lb-ft of torque. This power is routed through a five-speed automatic transmission with a manual-shift mode and downshift rev matching.


The Q45 features a myriad of standard safety features, including dual-stage front airbags with seatbelt sensors that help tailor deployment to collision severity. Front-seat occupants get active head restraints and seat-mounted side-impact airbags. Side curtain airbags protect front and rear outboard occupants. Other features include four-wheel antilock disc brakes with BrakeAssist and Electronic Brakeforce Distribution (EBD), and stability control. Every Q45 comes with Infiniti's RearView Monitor, which helps avert parking lot mishaps by projecting the images from a rear-mounted camera to the car's center display screen whenever the transmission is in reverse.


The Q's V8 engine feels strong once it revs up a bit, though it doesn't feel as quick off the line as competitors' V8s. As you'd expect of a large luxury sedan, the ride is delightfully quiet and comfortable on the highway. The active dampening suspension system provides a nice balance between ride comfort and handling ability, but unless you order the Sport trim don't expect the sharp reflexes of an Audi A8 or BMW 7 Series.


Step inside and you're greeted with an exquisite cabin draped in soft leather and wood trim. The electroluminescent gauges are both beautiful to look at and easy to read. Passenger room is ample throughout, and the spectacular Bose stereo fills the cabin with near perfect sound reproduction. High-tech in appearance, the Q's climate and radio controls are needlessly complicated, routed as they are through a joystick-controlled LCD -- good thing voice command comes standard. Trunk capacity (13.7 cubic feet) is a bit meager compared to the competition.


Overallundefined / 5

Consumer reviews

Read what other owners think about the 2006 INFINITI Q45.

5 star reviews: 75%
4 star reviews: 25%
3 star reviews: 0%
2 star reviews: 0%
1 star reviews: 0%
Average user rating: 4.8 stars based on 4 total reviews

Trending topics in reviews

  • appearance
  • ride quality
  • road noise
  • fuel efficiency
  • engine
  • maintenance & parts
  • value
  • reliability & manufacturing quality

Most helpful consumer reviews

5 out of 5 stars, 2006 Q45s

I have owned 1993 & 1996 Q45. The 2006 Q45s ride is exemplary and far superior to the others. The vehicle allows you to feel the road like a real sports car and yet, ridding in luxury. NOT EVERYONE HAS ONE! Mileage not bad for a V8,340hp. Design allows the car to speed up without wind noise. To bad 2007 will not see one; however, I am told that in 2008 the Q is coming back with a vengeance.

5 out of 5 stars, INFINITI Q45

This car is understated elegance. It is truly a great car that has been mostly ignored by the reviewers and the buyers. I also owned a 1992 Q45. it was also a great car. i never had a problem with either cars. D.E.

4.375 out of 5 stars, Last of the Q45 line?

Motor Trend's September 2006 new car review issue did not include a snap shot of the 2007 Q45 leading me to believe that 2006 may be its last year for the US market. Sales of the 2005 models approached Rolls-Royce Phantom levels in the US (only an average of about 22 per state) and fewer still in 2006 (anyone have the US figure through June?) and the failure to even publish a 2006 sales brochure (Infiniti sent me a 2005), though they do e-mail you a four-page 2006 brochure in .pdf led me to this conclusion. The only model produced in 2006 is the Q45s. The very successful M45 might be poised to replace the Q45. If true, I might be willing to part with my showroom Q45s for the right price.

5 out of 5 stars, Q-45 is the "King of Luxury"!!
Terry Starks,

This car is the best in its class. It is pure luxury!! They need to make 20 inch chrome wheels an option for the Q!!

Write a review

See all 4 reviews

Features & Specs

Sport 4dr Sedan features & specs
Sport 4dr Sedan
4.5L 8cyl 5A
MPG 15 city / 22 hwy
Seats 5
5-speed shiftable automatic
340 hp @ 6400 rpm

See all Used 2006 INFINITI Q45 features & specs


IIHS Rating

The Insurance Institute of Highway Safety uses extensive crash tests to determine car safety.

Side Impact TestNot Tested
Roof Strength TestNot Tested
Rear Crash Protection / Head Restraint
IIHS Small Overlap Front TestNot Tested
Moderate Overlap Front Test


Is the INFINITI Q45 a good car?
The Edmunds experts tested the 2006 Q45 both on the road and at the track. You probably care about INFINITI Q45 fuel economy, so it's important to know that the Q45 gets an EPA-estimated 18 mpg. What about cargo capacity? When you're thinking about carrying stuff in your new car, keep in mind that the Q45 has 13.6 cubic feet of trunk space. And then there's safety and reliability. Edmunds has all the latest NHTSA and IIHS crash-test scores, plus industry-leading expert and consumer reviews to help you understand what it's like to own and maintain a INFINITI Q45. Learn more
Is the INFINITI Q45 reliable?
To determine whether the INFINITI Q45 is reliable, read Edmunds' authentic consumer reviews, which come from real owners and reveal what it's like to live with the Q45. Look for specific complaints that keep popping up in the reviews, and be sure to compare the Q45's average consumer rating to that of competing vehicles. Learn more
Is the 2006 INFINITI Q45 a good car?
There's a lot to consider if you're wondering whether the 2006 INFINITI Q45 is a good car. Safety scores, fuel economy, cargo capacity and feature availability should all be factors in determining whether the 2006 Q45 is a good car for you. Check back soon for the official Edmunds Rating from our expert testing team Learn more
How much should I pay for a 2006 INFINITI Q45?

The least-expensive 2006 INFINITI Q45 is the 2006 INFINITI Q45 Sport 4dr Sedan (4.5L 8cyl 5A). Including destination charge, it arrives with a Manufacturer's Suggested Retail Price (MSRP) of about $58,100.

Other versions include:

  • Sport 4dr Sedan (4.5L 8cyl 5A) which starts at $58,100
Learn more
What are the different models of INFINITI Q45?
If you're interested in the INFINITI Q45, the next question is, which Q45 model is right for you? Q45 variants include Sport 4dr Sedan (4.5L 8cyl 5A). For a full list of Q45 models, check out Edmunds’ Features & Specs page. Learn more

More about the 2006 INFINITI Q45

Used 2006 INFINITI Q45 Overview

The Used 2006 INFINITI Q45 is offered in the following submodels: Q45 Sedan. Available styles include Sport 4dr Sedan (4.5L 8cyl 5A).

What do people think of the 2006 INFINITI Q45?

Consumer ratings and reviews are also available for the 2006 INFINITI Q45 and all its trim types. Overall, Edmunds users rate the 2006 Q45 4.8 on a scale of 1 to 5 stars. Edmunds consumer reviews allow users to sift through aggregated consumer reviews to understand what other drivers are saying about any vehicle in our database. Detailed rating breakdowns (including performance, comfort, value, interior, exterior design, build quality, and reliability) are available as well to provide shoppers with a comprehensive understanding of why customers like the 2006 Q45.

Edmunds Expert Reviews

Edmunds experts have compiled a robust series of ratings and reviews for the 2006 INFINITI Q45 and all model years in our database. Our rich content includes expert reviews and recommendations for the 2006 Q45 featuring deep dives into trim levels and features, performance, mpg, safety, interior, and driving. Edmunds also offers expert ratings, road test and performance data, long-term road tests, first-drive reviews, video reviews and more.

Our Review Process

This review was written by a member of Edmunds' editorial team of expert car reviewers. Our team drives every car you can buy. We put the vehicles through rigorous testing, evaluating how they drive and comparing them in detail to their competitors.

We're also regular people like you, so we pay attention to all the different ways people use their cars every day. We want to know if there's enough room for our families and our weekend gear and whether or not our favorite drink fits in the cupholder. Our editors want to help you make the best decision on a car that fits your life.

What's a good price for a New 2006 INFINITI Q45?

Which 2006 INFINITI Q45s are available in my area?

Shop Edmunds' car, SUV, and truck listings of over 6 million vehicles to find a cheap new, used, or certified pre-owned (CPO) 2006 INFINITI Q45 for sale near. Simply research the type of car you're interested in and then select a car from our massive database to find cheap vehicles for sale near you. Once you have identified a used vehicle you're interested in, check the AutoCheck vehicle history reports, read dealer reviews, and find out what other owners paid for the 2006 INFINITI Q45.

Can't find a new 2006 INFINITI Q45s you want in your area? Consider a broader search.

Find a new INFINITI Q45 for sale - 8 great deals out of 15 listings starting at $25,107.

Find a new INFINITI for sale - 5 great deals out of 5 listings starting at $9,068.

Why trust Edmunds?

Edmunds has deep data on over 6 million new, used, and certified pre-owned vehicles, including rich, trim-level features and specs information like: MSRP, average price paid, warranty information (basic, drivetrain, and maintenance), features (upholstery, bluetooth, navigation, heated seating, cooled seating, cruise control, parking assistance, keyless ignition, satellite radio, folding rears seats ,run flat tires, wheel type, tire size, wheel tire, sunroof, etc.), vehicle specifications (engine cylinder count, drivetrain, engine power, engine torque, engine displacement, transmission), fuel economy (city, highway, combined, fuel capacity, range), vehicle dimensions (length, width, seating capacity, cargo space), car safety, true cost to own. Edmunds also provides tools to allow shopper to compare vehicles to similar models of their choosing by warranty, interior features, exterior features, specifications, fuel economy, vehicle dimensions, consumer rating, edmunds rating, and color.

Should I lease or buy a 2006 INFINITI Q45?

Is it better to lease or buy a car? Ask most people and they'll probably tell you that car buying is the way to go. And from a financial perspective, it's true, provided you're willing to make higher monthly payments, pay off the loan in full and keep the car for a few years. Leasing, on the other hand, can be a less expensive option on a month-to-month basis. It's also good if you're someone who likes to drive a new car every three years or so.

Check out INFINITI lease specials