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Infiniti QX
2004-07 Infiniti QX56
Manufacturer Infiniti
Parent company Nissan
Production 2004–present (QX56)
1997–2003 (QX4)
Successor Infiniti FX (QX4)
Body style(s) 5-door SUV

The Infiniti QX is a luxury SUV built by Nissan and originally sold in North America. The first generation received its naming inspiration from the recognized four wheel drive terminology "4X4" with Infiniti adding a "Q" at the beginning to suggest it was a luxurious "4X4", borrowed from the Q45. The first generation also had a briefly available Japanese version called the Nissan Terrano Regulus. Consecutive generations are much larger, and the naming convention adheres to the current trend of using a numeric designation derived from the engine's displacement.

Infiniti has continued adding an "X" in the alphanumeric identification to all vehicles currently offered denoting that the particular vehicle has all-wheel-drive technology, based on Nissan's ATTESA system.

First generation series JR50 (1997-2003)

Infiniti QX4
1997-2000 Infiniti QX4
2001 Nissan Terrano Regulus
Manufacturer Nissan
Also called Nissan Terrano Regulus
Production 1997–2003
Assembly Kyūshū, Japan
Body style(s) 5-door SUV
Layout Front engine, rear-wheel drive / four-wheel drive
Engine(s) VG33E 3.3 L V6
VQ35DE 3.5 L V6
Transmission(s) 4-speed automatic
Wheelbase 106.3 in (2700 mm)
Length 1997-2000: 183.9 in (4671 mm)
2001-03: 183.1 in (4651 mm)
Width 72.4 in (1839 mm)
Height 70.7 in (1796 mm)
Fuel capacity 21.1 US gallons (79.9 L; 17.6 imp gal)
Related Nissan Pathfinder

The Infiniti QX4 is a mid-size sport utility vehicle (SUV) introduced in 1997 as a rebadged Nissan Pathfinder. It was released a year after Acura's introduction of the SLX and Lexus's larger LX 450. The QX4 was Infiniti's first entry into the SUV market segment.

In the North American market, it was marketed as the "Infiniti QX4" while in Japan it was sold as the Nissan Terrano Regulus. Major differences between these vehicles and the Pathfinder include a more advanced four wheel drive system, a more upscale interior, and unique styling. Although marketed as a luxury vehicle, it is capable off-road service due to its low-range four wheel drive system and 8.3 inches (211 mm) of ground clearance.

The QX4 received its first major update in 2001, with a completely new VQ series engine (also in G35 and FX35) increasing its power from a relatively weak 168 horsepower (125 kW) to a comparative 240 hp (179 kW) V6 engine. The displacement went from 3.3 L to 3.5 L. The timing belt was replaced with a timing chain, and the more reliable ignition distributor was replaced with a problematic individual coil ignition system.

This 2001 facelift also gave the QX4 an updated exterior and interior body style, including features such as a new dash with integrated analog clock, 17-inch (423 mm) alloy wheels and xenon HID headlamps. In Japan, the Terrano Regulus trim package was no longer offered. Also, a rear-wheel drive model was added (1997 through 2000 were only available in 4WD).

Year to Year Changes

2002 Infiniti QX: Cruise control designed to maintain a set distance from other traffic was the main addition for 2002. The QX4 shared Nissan's Intelligent Cruise Control with Infiniti's flagship Q45 sedan. Employing laser sensors, the system was designed to automatically speed or slow the QX4 to keep it a constant distance from cars ahead. Also new for 2002 was a revised audio system, plus audio controls for the available leather/wood steering wheel. The optional rear-seat video entertainment system offered a choice of VCR or DVD player.

2003 Infiniti QX: Additional standard equipment for 2003 included curtain-type side airbags, available for the first time. Several new standard features had previously been part of the Premium Package, including 17-inch wheels, a driver-seat memory system, and a leather/woodgrain steering wheel with audio controls. Options included heated front/rear seats and a videotape or DVD rear-seat entertainment system, as well as a power moonroof.

The QX4 is essentially a dressed-up Nissan Pathfinder, and it competes against such rivals as the Jeep Grand Cherokee, Lexus RX 300 and Mercedes-Benz M-Class. Just one trim level is available. Nissan’s BirdView navigation system gives a panoramic view of the road ahead or a conventional video map, and this feature remains optional. Infiniti sold 18,735 QX4s during 2001, according to Automotive News.

Exterior: The most notable design element of the QX4 is its unique and assertive front end, which is led by a twin-slot upper grille with a massive air intake below. Square xenon high-intensity-discharge headlights and fog lights in the front fascia help define the bold picture. Otherwise, the QX4 is conventional in SUV appearance.

The QX4 measures 183.1 inches long overall and is slightly longer than the RX 300 and M-Class. Infiniti’s SUV rides on a 106.3-inch wheelbase, measures 72.4 inches wide and stands 70.7 inches tall to the top of its roof rack. The vehicle sits high off the ground and requires a steep climb into the passenger compartment. Narrow rear doors can make it difficult for backseat passengers to get in and out. The QX4 is also equipped with standard running boards, and its alloy wheels hold 16-inch tires.

Interior: The QX4 seats five occupants and features power front seats and a reclining split-folding backseat. Folding down the rear seat creates 85.5 cubic feet of cargo space, and a covered bin below the cargo floor adds a little more storage area.

Luxury amenities include leather upholstery, wood interior trim, automatic climate control, heated power mirrors and a Bose sound system with a cassette/CD player. Electrofluorescent gauges face the driver, and the power front windows have one-touch automatic up/down operation. Heated front and rear seats and a moonroof are among the few options. A rear-seat video entertainment system is also available.

Under the Hood: Like the engine in the Pathfinder, the 240-horsepower, 3.5-liter V-6 works with a four-speed-automatic transmission and either rear-wheel drive (RWD) or four-wheel drive (4WD). A console switch operates the 4WD system, which allows three selections: RWD, automatically engaging 4WD, or permanent 4WD with the power split evenly between the front and rear wheels.

Safety: Antilock brakes and side-impact airbags are standard. Intelligent cruise control uses laser sensors to keep the vehicle at a constant distance from the cars ahead.

Driving Impressions: Performance from the 240-hp engine is satisfying and energetic, but it’s not quite record setting. The QX4’s ride quality is even more noticeable. Except for an occasional thud at the rear end when hitting an especially nasty bump, the ride is easy and enjoyable on the highway and almost as pleasing on rougher two-lane roads.

Xenon high-intensity-discharge headlights produce an outstanding view of the road ahead. Marred only by difficult backseat entry due to the narrow doors and limited headroom in the rear, the QX4 is an appealing road machine.

As of model year 2002, the Regulus was no longer available in Japan.

The QX4 was discontinued in 2003, and its position in price was taken by the larger G35/M35/M45-based FX35/45 crossover SUV. The last QX4 was manufactured during November 2002.

Second generation series JA60 (2004-present)

Infiniti QX56
2008 Infiniti QX56
Manufacturer Nissan
Production 2004–2010
Assembly Canton, Mississippi, United States
Body style(s) 5-door SUV
Layout Front engine, rear-wheel drive / four-wheel drive
Platform Nissan F-Alpha platform
Engine(s) 5.6 L V8 VK56DE
Transmission(s) 5-speed automatic
Wheelbase 123.2 in (3129 mm)
Length 206.9 in (5255 mm)
Width 2008-2010: 79.5 in (2019 mm)
2004-07: 78.8 in (2002 mm)
Height 2005-2010 2WD: 77.0 in (1956 mm)
2004 & 2008-2010 4WD: 78.7 in (1999 mm)
2005-07 4WD: 77.8 in (1976 mm)
Curb weight 5,597 lb (2,539 kg)
Related Nissan Titan
Nissan Armada
Nissan Frontier
Nissan Xterra

The Infiniti QX56 is a full-size sport utility vehicle (SUV) sold under the Nissan-owned Infiniti luxury brand. It is based on the Nissan Armada full-size SUV, and shares the F-Alpha platform with the Nissan Titan pickup truck. The QX56 is currently unique to the United States, Canada, Russia, Bahrain, UAE, Kuwait and Saudi Arabia. It is also the first Infiniti built in the United States.

The rear door handles are installed on the "C" pillar as a Nissan design tradition started with the 1986 Nissan Pathfinder. When the four door Pathfinder was introduced, Nissan chose to conceal the door handles as a part of the "C" pillar trim to visually make it appear like a two door truck with a camper shell, with conventional door handles on the front doors.

The truck is propelled by a 5.6 L VK56DE V8 engine (315 hp [227 kW] @ 4,900 rpm and 390 lb·ft (529 N·m) torque @ 3,600 rpm) and a 5-speed automatic transmission with an overdrive. Each cylinder in the engine is lined with cast iron. The valvetrain is a DOHC design with four valves per cylinder. Infiniti designed the QX56's throttle responsiveness to correspond to specific drivetrain modes: when the driver selects all-wheel drive, the throttle becomes less sensitive, presumably to allow easier regulation of acceleration when off-road.

The Infiniti QX56 has around 9,000 lb (4082 kg) of towing capacity. Mileage at peak performance drain is 12 miles per US gallon (20 L/100 km; 14 mpg-imp). It comes in one trim level, with only key options such as: DVD entertainment system, 4WD/2WD, and a bench instead of captain chairs as the second row. Other features which come standard are a ten-speaker Bose system, DVD-based navigation system, leather trim for all seats, dual-climate control, 18-inch chrome alloy wheels, and an adaptive cruise control system. A precrash system is a novelty in the market as well.

Since the demise of the Q45 (which was priced above the QX56) after 2006, the QX56 is the most expensive Infiniti in North America, and is Infiniti's only full-size vehicle. For 2008, the Infiniti QX56 received a minor facelift which included more standard equipment and standard 20-inch chrome wheels.

As with the Armada, the QX56 was very unreliable in Consumer Reports' surveys mainly due to problems with the brakes. However, the 2008 model had all the brake problems solved, and the QX56 now has an average rating in CR's surveys. For 2009 the QX56 received auto locking doors and deep garnet metallic was added as a new color. For 2010 the MSRP was increased by $1000, 4WD versions now cost $60,000 and some colors were deleted. The 2010 model is the last year for the QX56 and a Japanese-built replacement based on the 2010 Nissan Patrol will be sold instead[1]. In September 2009, spy shots previewed a new QX56 version of the Patrol, which is slated go on sale in North America in 2010[2].

Third generation

The QX56 is expected to debut at the 2010 New York Auto Show as it shares the same platform with the newly redesigned 2010 Nissan Patrol. It is expected to get the Nissan VK56VD (5.6) V8 engine with Variable Valve Event and Lift producing 420 hp. Here is link of spy shots of 2011 Infiniti QX56


  1. ^ "Spy Shots: 2010 Nissan Patrol" from (December 8, 2008)
  2. ^ "2011 Infiniti QX Preview" From (September 10, 2009)

External links


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