Overview & Reviews

The Q45 was a car of firsts for Infiniti. As well as being one of two debut cars for this luxury brand's American introduction for 1990, the Infiniti Q45 was also the first rear-drive luxury car from a Japanese automaker to directly compete against European sports sedans. The "Q" featured firm suspension tuning, a powerful V8 engine, a quick-shifting automatic transmission, an inviting cabin and a distinctively bold demeanor. Although mostly a critical success, its sales never challenged those of its Japanese rival or the other segment leaders, as consumers were put off by odd initial advertising, muted styling and a lack of prestige associated with the brand.

Following several years of dwindling sales numbers and a questionable second-generation version that emphasized comfort over performance, Infiniti attempted to restore the car to its athletic roots for the third generation. The heart of these Q45s was a specially designed 4.5-liter V8 burbling with 340 horsepower and 333 pound-feet of torque. These numbers put the Q in good company alongside other premium luxury sedans, and a standard adjustable adaptive suspension allowed drivers to tailor the ride for more control around corners or more cushion on the highway. Although the third-gen Infiniti Q45 was certainly capable and comfortable for long-distance travel, it wasn't a match for more performance-oriented competitors when the road turned twisty.

The Infiniti Q45 was discontinued after 2006, but a fourth-generation model is rumored to be in the works. As a used model, the Q still might be worth a look, especially for shoppers interested in an alternative to the luxury sedan status quo. Sales were never great, however, and it will likely take a little extra effort to locate one of good standing.

Most recent Infiniti Q45

The third-generation Q45 was sold for the 2002-'06 model years. It featured a 340-horsepower V8 running through a more sophisticated five-speed automatic transmission. This third-generation Q45 arrived with distinctive "Gatling gun" HID headlights and much sharper styling than the previous Q.

The interior of the late-model Infiniti Q45s was airy, light and spacious. Furnished with vast tracts of wood, brushed aluminum accents, leather and a simple instrument cluster, it surrounded its occupants elegantly. Passenger room was ample throughout, and the power-adjustable driver seat never ceased to provide both comfort and support behind a power tilt/telescoping wheel that accommodated various driver postures with ease. Regrettably, though, many of the Q45's features were controlled by a joystick-based interface that must have seemed good to Infiniti's designers in principle but was clumsy to use in the real world.

Despite generally favorable reviews, however, sales remained poor over the years. In 2005, fewer than 1,200 were sold in the entire United States. For that reason, those shopping for a unique and satisfying performance luxury sedan you won't see on every block -- or any block -- are apt to find the third-gen Q an outstanding value on the used car market.

Minor evolutionary changes carried the Q45 through the years until 2005, when it received a freshening with restyled front and rear sheet metal, new headlights/foglights and LED taillights. Inside, there were new contoured, double-stitched seats, white luminescent gauges, chrome accents and dark maple trim. Underneath, there was a recalibrated transmission and new 17-inch alloy wheels.

In its final year, the 2006 Infiniti Q45 went out with a flourish: A new Sport variant featured active rear steering, performance-oriented suspension tuning and 19-inch alloy wheels. The active steering system monitored vehicle speed and steering input, and used motor-driven controls to adjust the rear suspension geometry to improve handling performance and response. Other changes this year included further revision to the five-speed automatic transmission (now with downshift rev-matching), Bluetooth connectivity and the addition of a lane departure warning system to the optional Premium Package.

Past Infiniti Q45 models

The first Q45 came to market in 1989 as a 1990 model, impressing those who valued distinctive style and performance, thanks to its 278-hp, 4.5-liter V8. In fact, it was one of the first Japanese luxury sedans to blend better-than-average performance with luxurious trimmings and simple-but-elegant styling. It's not an overstatement to say the Q helped redefine the modern luxury sedan.

The Infiniti Q45 offered two flavors initially -- base and Q45t. The Q45t touring package had chassis upgrades, a rear spoiler, BBS alloy wheels and HICAS four-wheel steering. The 1991 Q could also be had with a semiactive suspension (the Q45a). Due in part to a notoriously suspect, product-free initial advertising campaign, however, there weren't enough potential buyers turning into actual buyers. The Q45a model was dropped in 1996. (If you do find yourself looking at a Q45a, know that its active suspension components are complex and will require additional maintenance.)

In an attempt to increase sales and profitability, the second-generation Q45 adopted a more sober philosophy and moved to a new mainstream platform in 1997. Along for the ride were a more conventional appearance and a smaller, less-inspiring 4.1-liter V8 producing 266 hp. The original car's all-multilink suspension morphed to include struts up front, and was further tuned for a comfort bias. But none of this did much to help the car's sales, as they remained far below its competitors.

The sedan's appearance evolved again in 1999 with restyled sheet metal, HID headlights up front and an analog clock again gracing the dash; 17-inch wheels and an electronically adjustable suspension were standard on the Q45t. All Q45s of this era included a leather-lined cabin with exotic wood grain trim, Bose/CD audio and driver-seat/steering wheel position memory; a sunroof and heated seats were also available. The 2000 Q45 Anniversary Edition trim level was the flagship of the line, and the anniversary model was replaced by a Luxury trim in 2001.

At the time, we said that the second-generation Infiniti Q45 offered luxurious appointments, stylish sheet metal and a relatively low price. A Q of this vintage will probably work best for those drivers primarily interested in a luxury sedan that can provide a quiet and comfortable highway ride.

User Reviews:

• 

  DO NOT overlook the Q45 - superior !! - 2002 Infiniti Q45
  By JRow - July 6 - 9:20 pm

  We looked at all the competitors - BMW 7 series, Mercedes 500, Lexus 430, the Infiniti Q45 outperforms in all aspects: fit & finish, 340 HP engine, birds view navigation, voice recognition, rear seat reclines! and rear seat controls, you must see and drive this car before you make a decision.

• 

  Terrific Luxury Ride - 1998 Infiniti Q45
  By Nicolo - March 10 - 10:00 am

  This car feels like it was built from a solid piece of steel. In my 20,000 miles, nothing has hinted at going wrong. Absolutely silent and smooth at idle, with a BMW growl when you push a little, comfortable seats and a sensible list of accessories make for the best of the 40-odd cars I have owned, especially dollar for dollar.

• 

  2005 Infiniti Q45 (A pretty good car) - 2005 Infiniti Q45
  By G - March 2 - 8:26 am

  Has a very solid feel, if you need HP to get up and go, no problem, lots of power, lots of interior toys (a bit cumbersome at first to use). I personally do a bit of hgwy driving and this is a pretty good car to be in. (Great cruise control feature)

• 

  2004 Q4 - Dislike the ICC - 2004 Infiniti Q45
  By AZScott - November 12 - 3:16 am

  Love the car, hate the Intelligent Cruise. Every time you pass a semi or medium to large truck the car slams on the brakes. At 75-85 mph or more, not fun. Nav system is poor, in the middle of a 20 yr old freeway it just goes awol and shows you driving in the middle of the desert. Passenger seat has no lumbar support. Purchased a used $10K Mercury Montego for my mom that has a much superior touch screen nav and passenger seat lumbar. Its generally fun to drive and quiet, but Im not as impressed as I hoped Id be with it.

• 

  Smooth, but oil leak problems - 2000 Infiniti Q45
  By RBI - November 1 - 10:00 am

  Great riding car, super comfort, large boat-like plush ride. Awesome as family car or cross country cruiser, but had problems with oil leak. Thank goodness I purchased under warranty.

• 

  best of both - 2000 Infiniti Q45
  By elder1j@aol.com - November 1 - 10:00 am

  Best of both, lots of luxury with sporty features and performance.

• 

  Q45 - 2002 Infiniti Q45
  By Southern Illinois - October 27 - 10:00 am

  When I took delivery of car there were several recalls or service upgrades that the dealer had not addressed. It had a defective wheel(out of round) which dealer refused to warrant. Rear sunshade broke at 33,000 miles. Electronics malfunction occasionally requiring you to turn off car and reset. Easier to use manual controls rather than voice as I cant remember exact wording and everyone must stop talking. Car magazine tests show about 6.5 to 60. Fast but a long way from 5.9. Needs switch to turn off traction control. My last car was Lexus LS400 which was superior in quality, dealer service and workmanship. Not holding value.

• 

  Fun to Drive Luxury - 2003 Infiniti Q45
  By W.Kahrs - October 25 - 1:43 am

  Best valued luxury car ever. Dealer support is excellent. Have achieved 21 MPG on commutes after learning what works, but expect 17 if you like to experience the 340 hp. This car never fails to impress passengers who comment on the excellent ride. Loves to run at higher speeds

• 

  Why does this car not hold its value? - 2000 Infiniti Q45
  By WmTrap - September 8 - 12:20 am

  I have had NO problems with my car. I think it is a very eye-catching vehicle with very nice interior appointments. My only complaint is the size of the truck which is due to the positioning of the gas tank. This definitely should have been changed before 2001. Why does this vehicle lose its value so precipitously? I am considering purchasing the car when the lease expires but am afraid it is one of the worst automobile investments I can make.

• 

  The Best V8 - 2003 Infiniti Q45
  By devinkw - September 4 - 5:43 pm

  This is a wonderful car with so much horsepower it is unreal excellent 0 to 60 time and good quarter of a mile time to. I taken this car to the track and it blew away almost every car out there I love it.