Infiniti G: Wikis


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Infiniti G
V36 Infiniti G35 sedan
Manufacturer Infiniti
Parent company Nissan
Production 1991–1996
Class Entry-level luxury car/
Compact executive car (1991-96, 1997–2002)
Mid-size luxury car (2003–present)

The Infiniti G is a mid-size entry-level luxury car and coupe produced by Nissan's luxury brand Infiniti. The first two generations of the Infiniti G (P10 and P11) were based on the Nissan Primera and were originally compact executive cars; however, beginning with its third generation (V35), the Infiniti G has been based on the sportier Nissan Skyline line of sedans, coupes and 2-door convertibles. The Nissan FM platform, on top of which the 3rd and 4th generations (V35 and V36) of the Infiniti G have been built, has shared components with the Infiniti M and also underpins the 350Z and the Infiniti FX models.


First generation (P10, 1991–1996)

P10 (G20)
1991–1993 G20
Also called Nissan Primera
Production 1991–1996
Assembly Oppama, Japan
Body style(s) 4-door sedan
Layout FF layout
Wheelbase 100.4 in (2,550 mm)
Length 1993-94: 174.8 in (4,440 mm)
1991-92 & 1995-96: 175 in (4,400 mm)
Width 66.7 in (1,690 mm)
Height 1993-94: 54.7 in (1,390 mm)
1991-92: 54.9 in (1,390 mm)
1995-96: 53.5 in (1,360 mm)
Curb weight 2,535 to 2,818 lb (1,150 to 1,278 kg)
Fuel capacity 15.9 US gallons (60.2 L; 13.2 imp gal)
1991–1993 G20
1993.5 G20
1994 G20

The Infiniti G20 was Infiniti's entry-level luxury car in the United States during most of the 1990s and into the 2000s. Similar to the Japanese/European market Nissan Primera sedan, the G20 offered higher levels of standard equipment. It was launched in 1991 as Infiniti's first small car as an entry-level alternative to the Q45; later advertisements emphasized its European heritage with the tag line "Born in Japan. Educated in Europe. Now Available in America." Two generations of the G20 exist in the United States, the HP10 (P10), built from 1991 to 1996, and the HP11 (P11), built from 1999 to 2002. All G20s were front-wheel drive and were built in Oppama, Japan.

The first 1991 G20 was completed on July 10, 1990. The final 1996 G20 was completed on July 19, 1996. The P10 featured the first application of Nissan's multi-link front suspension in a front-wheel-drive car, with an independent MacPherson strut setup in the rear. It came standard with a 5-speed manual transmission. The only options to begin with were an automatic transmission, leather interior, and a power glass moonroof; a Touring package (labeled G20t) was introduced in 1994 and featured a black leather interior with sport front bucket seats and fold-down rear seats, as well as a limited-slip differential in the transmission and a spoiler on the rear decklid.

Engine design

The G20 was powered by the SR20DE Inline 4-cylinder. It was a transversely mounted dual overhead cam naturally aspirated reciprocating internal combustion engine. Displacement was 2.0 litre (1998 cc) with a square (Bore × Stroke: 86.0 × 86.0 mm). This engine was also shared with the US-spec Nissan Sentra/Nissan 200SX SE-R, Nissan NX2000, and a host of non-US Nissan vehicles. The particular version used in the G20 produced 140 crank horsepower in the US at first, and 145 in '00+ editions (116 to 126 whp; stock range) and 132 lb·ft (179 N·m) or 136 lb·ft (184 N·m) torque (111 to 120 wft·lbf; stock range). These engines were also fairly high-revving with a redline of 7500 rpm for 1991 through 1996 editions, 6950 rpm for the 1999 edition, and 6750 rpm for 2000+ editions.[citation needed] Due to the SR20DE engine's flexibility, reliability, fuel economy and high power-handling capabilities, as well as a low buy-in cost, pre-owned SR-powered Sentras, 200SXs and G20s have become popular and prominent in the "tuner" or "import scene" subculture.[citation needed]

There were three major variants of the SR20DE used in the G20. The first, used from 1991 to 1993.5, was the highport, in which the injectors and fuel rail were located above the intake plenum. In 1994, due to tightening emissions restrictions, Nissan switched to a lowport design, in which the injectors and fuel rail switched places with the intake plenum. This design also featured a milder intake camshaft. (Switching it out for the highport intake cam is a popular upgrade to gain more power.) This design was used from 1994 to 1996 and again in 1999. In 2000 Nissan replaced the valvetrain with a roller-rocker arm lifter design in place of the (non roller) rocker arm previously used, but kept the lowport intake design; many performance parts are not interchangeable between roller-rocker and highport/lowport engines, most notably camshafts.


The G20 featured either a 5-speed manual transmission or an optional 4-speed automatic. Stock manual transmissions are typically usable up to approximately 250 whp, while stock automatic transmissions can only handle about 155 whp.[citation needed] Most front wheel drive transmissions from other SR-powered cars can be used with few modifications. The stock transmission as well as other SR20 transmissions are often upgraded with various modifications in order to handle more power. Common manual transmission modifications include cryo treating, shot peening, transmission case welding, aftermarket limited slip differential, aftermarket axles, and upgraded clutches. Common automatic transmission modifications include built valve bodies, aftermarket torque converters, automatic transmission fluid (ATF) coolers, additional ATF filters, and aftermarket TCUs. Higher rated transmission swaps from front-wheel drive VQ or QR25DE powered cars such as the 2002–2006 Nissan Sentra SE-R Spec-V have also been performed.[1]


The G20 was a badge-engineered version of the Nissan Primera, but because Infiniti was pitched as a premium brand, it featured a high level of equipment compared to its European and Japanese relatives. The only engine available was the 2.0 litre SR20DE Inline 4-cylinder; in Europe this was the top-of-the-line engine for the Primera lineup. 5-speed manual and 4-speed automatic transmissions were both available, with the 5-speed being praised as "one of the best in the business."[2] Power windows, power locks, power mirrors, air conditioning, four-wheel disc brakes with ABS, alloy wheels, a Bose stereo, a theft-deterrent system, cruise control, floor mats, and a leather-wrapped steering wheel and gearshift knob were all standard. Leather and a power moonroof were common options, and were later offered in a package that included power seats and keyless entry. Later models also featured dual front airbags. The standard trim was called Luxury. Two major trim package upgrades were offered: Touring, badged G20t, available from model years 1994 to 1996 and 1999 to 2001, and Sport (with no badge modification) which was offered during model year 2002. These packages featured a limited-slip differential in the transmission, sportier, more highly bolstered front bucket seats and fold-down rear seats, fog lamps, and a spoiler on the rear decklid. The details of these trims varied from year to year.

P10 model refresh changes

The main changes for the P10 came as a midyear refresh in 1993 (model year 1993.5), when dual airbags replaced motorized seatbelts, leather interiors came standard with power front seats, body-colored side moldings replaced matte-black ones, the air conditioner was converted from R12 to R134a refrigerant, the audio system was upgraded to six speakers with a CD player instead of the previously-standard cassette deck, and other new options such as remote keyless entry were added. In addition, the 1994 model year was given a new chrome grille and chrome door handles, a lowport engine (replacing the original highport SR20DE, in which the intake plenum is below the fuel injectors and fuel rail), a change in the vehicle's self-diagnostic system to OBD-II, and larger 195/65R14 tires. The Touring models, introduced in 1994, featured a limited-slip differential in the transmission; 195/60R14 tires, sportier, more highly bolstered black leather front bucket seats and fold-down rear seats; fog lights; and a spoiler on the rear decklid.

The G20 was temporarily discontinued after the 1996 model year, leaving the I30 as Infiniti's lowest-priced car for the 1997 & 1998 model years.

Sales by calendar year

Calendar Year 1991 1992 1993 1994 1995 1996 Total '91-'96 CY Sales
Sales 13,929 14,592 16,545 17,248 16,818 13,467 92,599

Second generation (P11, 1999–2002)

P11 (G20)
2002 Infiniti G20
Also called Nissan Primera
Production 1999–2002
Assembly Oppama, Japan
Body style(s) 4-door sedan
Layout FF layout
Wheelbase 102.4 in (2,600 mm)
Length 177.5 in (4,510 mm)
Width 66.7 in (1,690 mm)
Height 55.1 in (1,400 mm)
Curb weight 2,913 to 2,981 lb (1,321 to 1,352 kg)
Fuel capacity 15.9 U.S. gallon (60 liter)
1999 Infiniti G20

The second-generation G20 underwent several changes, including adopting the multi-link beam rear suspension very similar to the 1995–1999 Nissan Maxima with a continued use of the independent multi-link strut front suspension of the P10 (similar to 300ZX and Skyline GT-R). Despite enthusiasts' aversion to the beam, several publications praised the handling of the updated G20,[2] and it was a technically good method of avoiding lateral suspension movement (which would compromise handling) while still offering a compliant ride.[3] The P11 has a lateral grip figure of between 0.80 and 0.94g plus a 61/39 weight distribution (61% front/39% rear). It grew in size, with a 2.7-inch (69 mm) length increase and 0.4-inch (10 mm) height increase over the P10, resulting in 1.4 inches (36 mm) more legroom for rear-seat passengers.[2] The new model's increased size and luxury options, however, added to the car's weight (which rose to 3000 pounds);[2] the stock 140-145 crank horsepower engine provided lower performance (the MY1999 automatic, for example, had a 10.9-second 0-60 mph time and did the quarter-mile in 18.4 seconds at 77 mph (124 km/h).[2]

The first second-generation 1999 G20 was completed on May 18, 1998. The final second-generation 2002 G20 was completed on January 11, 2002. All models featured a higher level of standard equipment than the P10, including automatic climate control on all but cloth-seat Luxury models, 15" 16-spoke alloy wheels, a higher-quality double-DIN Bose radio/CD/cassette player standard, keyless entry, standard power moonroof, and later, side-impact airbags. The Touring models continued to feature a limited-slip differential, but also had unique 12-spoke alloy wheels, and the upgraded sports seats were now available in beige leather and "sport cloth" (the latter as a factory-order option) in addition to the previously-offered black leather.

P11 model refresh changes

Several noteworthy changes for the P11 came as a refresh in the 2000 model year, when the 145 crank horsepower roller rocker variant of the SR20DE engine was implemented, newer automatic and manual transmission variations were introduced, anti-theft immobilizer circuitry was added, anti-glare side mirrors became standard, and a remote trunk release was added to the keyless entry fob. In 2002, the G20t was dropped and a Sport model was introduced. In addition to the prior G20t's limited slip differential and decklid spoiler, this model featured two-tone leather/suede sport seats, 16" wheels, and a variety of minor cosmetic modifications. The 2002 base G20 received the 12-spoke Touring alloy wheels as standard.

Sales by calendar year

Calendar Year 1999 2000 2001 2002 Total '99-'02 CY Sales
Sales 16,108 13,095 11,512 5,760 46,475

End of production

The G20 was discontinued in favor of 2003's rear wheel drive G35, a badge engineered export version of the JDM V35 Nissan Skyline which was introduced in Japan in 2001. The G35 received significant praise from the automotive press and became a sales success for Infiniti despite being priced approximately USD$5,000 above the G20's average MSRP of $23,000. The G35, significantly larger and more powerful than the G20, was aimed more at the entry level luxury-sports sedan market instead of the G20's luxury-sport compact market. The Nissan Primera was continued outside the United States as the slightly restyled HP11-144 and the significantly restyled HP12 markets with a final end to all production in 2006 as a 2007 model.

Performance modifications to G20 (P10 & P11)

The SR20DE responds very well to modifications. Forced induction (primarily turbocharging) is often used to upgrade G20s to higher power levels, as much as 200 to 300 whp. Because the turbocharged SR20DET has a very similar design to the SR20DE, many components from the former can easily be used with the latter. SR20DET engine swaps are also common, and high levels of over 400 whp are possible. Factory turbocharged SR20VET Neo-VVL swaps are possible but rare, and output is difficult to estimate. The naturally aspirated SR20VE Neo-VVL can also be used in an engine swap which can (with bolt-ons) generate around 190 whp and can also be turbocharged. The SR20VE head can also be attached to the SR20DET block, in order to take advantage of the lower compression ratio and stronger crankshaft and rods of the SR20DET. Front-wheel drive VQ35DE swaps have been performed on other SR20-powered Nissans, and successfully attempted on the G20 at least once.[4]

Third generation (V35, 2003–2006)

2004–2005 Infiniti G35 sedan
Also called Nissan Skyline
Production 2003–2006 (sedan)
2003–2007 (coupe)
Assembly Tochigi, Tochigi, Japan
Body style(s) 4-door sedan
2-door coupe
Layout Front engine, rear-wheel drive / four-wheel drive
Platform Nissan FM platform
Engine(s) 3.5 L 190 kW (260 hp) V6
3.5 L 210 kW (280 hp) V6
3.5 L 222 kW (298 hp) V6
Wheelbase 2,850 mm (112 in)
Length 4,630 mm (182 in)(coupe)
4,735 mm (186.4 in) (sedan)
Width 1,815 mm (71.5 in) (coupe)
1,750 mm (69 in) (sedan)
Height 1,390 mm (55 in) (coupe)
1,465 mm (57.7 in) (sedan)
Fuel capacity 75 litres (19.8 US gal; 16.5 imp gal)
Related Infiniti FX
Infiniti M
Nissan 350Z
2003 Infiniti G35 coupe

The third generation G (V35) was introduced to North America for the 2003 model year, as a G35, being the replacement for the Infiniti G20. It is known as the Nissan Skyline 350GT in Japan and is available in sedan and coupe forms.

G35 sedan

The G35 is based on the Nissan FM platform shared with the Nissan 350Z coupe and roadster sports car and Infiniti FX crossover SUV. The FM platform stands for "front midship" design where the engine is moved back towards the rear of the engine bay which in turn improves the weight distribution. The G35 was Motor Trend's Car of the Year for 2003 and has been well-received by both the media and customers as a viable alternative to other luxury cars. The G35 was also nominated for the North American Car of the Year award that year and was on Car and Driver magazine's Ten Best list for 2003 and 2004.

Sporting the ubiquitous VQ35DE engine, the Infiniti G35 uses a front-midship engine, rear-wheel drive layout (all-wheel drive is available for the G35x sedan) to achieve a 52% front/48% rear weight distribution. Both body styles are available with either a 5-speed automatic or 6-speed manual transmission, although the automatic is the only transmission available for the AWD sedan.

A 6-speed manual transmission became available in 2003 as a 2003 model on the sedan (the coupe always had the option). For the 2003-04 model years, the V6 produced 195 kW (265 PS; 261 hp) and 350 N·m (258 lb·ft) of torque in the sedan, 210 kW (286 PS; 282 hp) and 365 N·m (269 lb·ft) in the coupe. However, owners of various G35 enthusiast groups have shown that the engine in the sedan produces nearly the same amount of power as the coupe. In the 2005 and 2006 model years, those with automatic transmissions (both sedan and coupe) produced 210 kW (286 PS; 282 hp) and 365 N·m (269 lb·ft) of torque, while those with manual transmissions produced 222 kW (302 PS; 298 hp) and 350 N·m (258 lb·ft) of torque (again, both in sedan and coupe form). There is speculation that the output did not actually change, and that Infiniti was simply taking advantage of the outdated SAE standard of rating horsepower. The G35 is assembled in Tochigi, Tochigi, Japan, and the first G35 was built on March 12, 2002 as a 2003 model.

The AWD model of the G35 sedan is called the G35x in the United States and the Angelax elsewhere. Although the automatic transmission for the G35x is manufactured by Aisin-Warner, the AWD technology uses Nissan's proprietary ATTESA E-TS AWD system. The system will make the car 100% rear wheel drive when driving at a steady speed. When the driver uses the throttle to accelerate from a stop or constant speed, the AWD system can send up to 50% of torque to the front wheels. When the car's speed becomes steady again, the drivetrain will return torque to the rear wheels. The AWD system will also transfer torque to the front wheels if the system detects loss of traction. The process is made by the system in a matter of milliseconds. This technology was first used in the 1989 Nissan Skyline GT-R, and has since been used in subsequent Skylines, and other vehicles in Japan and overseas, including the Nissan Bluebird, and Nissan Stagea. There are few differences between the 2003 & 2004 G35 coupes. Both '03 & '04 six-speed manual models had the option of Brembo brakes and the Performance Tire and Wheel Package. On the 2005 coupes, three new colors, 'Athens Blue', 'Lakeshore Slate', and 'Serengeti Sand', replaced 'Twilight Blue', Caribbean Blue, and 'Desert Platinum' respectively; also, Willow Cloth interior was removed, and Stone became available.

2005 refresh

2006 Infiniti G35 coupe
2006 Infiniti G35 sedan

The G35 was refreshed inside and out in 2005. The interior was given sportier gauges with better backlighting and higher quality trim and knobs. Genuine aluminum trim replaces "tinted" interior trim, and the dash and center console layout were revised. Rosewood trim becomes available as a package on the 2005 models. MP3/WMA playback was added to the now standard 6 disc in-dash CD player, and the cassette player was removed. Brembo brakes were removed for the 2005 and 2006 models, and the brakes were redesigned with larger discs and a different caliper design. This was partly in response to a number of complaints about the previous years' brakes, which included a class action lawsuit filed in California related to premature wear on 2003–2004 models[5][6]. A sport-tuned suspension package was standard on all six-speed manual equipped models, which included a viscous limited slip differential and the higher output VQ35de "Rev-UP" engine. The 2006 models received minor updates. On the exterior there were new headlights, taillights, spoiler, sport side sills, and front bumper.[7] Bluetooth capability was added to the interior for hands-free phone use. Rear active steering was an option for the '06 coupe.

Fourth generation (V36, 2007–present)

G35 and G37
Infiniti G sedan
Also called Nissan Skyline
Production 2006–present (sedan)
2007–present (coupe)
2009–present (convertible)
Model year(s) 2007–present (sedan)
2008–present (coupe)
2010–present (convertible)
Assembly Tochigi, Tochigi, Japan
Class Mid-size entry-level luxury sedan
Body style(s) 2-door coupe
4-door sedan
2-door convertible
Layout Front engine, rear-wheel drive / all-wheel drive
Platform Nissan FM platform
Engine(s) 3.5 L VQ35HR V6 306 hp (228 kW) (2007–2008 sedan)
3.7 L VQ37VHR V6 330 hp (250 kW) (2008–present coupe)
3.7 L VQ37VHR V6 328 hp (245 kW) (2009–present sedan)
Transmission(s) 6-speed manual
5-speed automatic (2007–2008 sedan, 2008 coupe)
7-speed automatic (2009–present)
Wheelbase 112.2 in (2850 mm)
Length 183.1 in (4651 mm) (coupe)
187.0 in (4750 mm) (sedan)
183.3 in (4656 mm) (convertible)
Width 72.9 in (1852 mm) (convertible)
71.8 in (1824 mm) (coupe)
69.8 in (1773 mm) (sedan)
Height Convertible
55.1 in (1400 mm)
54.8 in (1392 mm) (AT)
54.9 in (1394 mm) (MT)
57.2 in (1453 mm) (RWD)
57.8 in (1468 mm) (xAWD sedan) & 57.6 in (1463 mm)
Related Nissan 350Z
Nissan 370Z
Infiniti FX
Infiniti M

Infiniti redesigned the G sedan and coupe for the 2007 and 2008 model years, respectively. The fourth generation G sedan launched in November 2006 as a 2007 model with a heavily revised 3.5 L VQ35HR engine and a 5-speed automatic as the standard transmission, a 6-speed manual was also available. The redesigned second generation G coupe launched in August 2007 as a 2008 model with a larger 3.7 L VQ37VHR, the first Nissan engine to feature VVEL. It too came with either a 5-speed automatic or 6-speed manual. All manual G models include a sport package. The 2009 model convertible G37 launched in June 2009. The 2009 model G sedan followed suit using the same VQ37VHR engine. Also for 2009 the 5-speed automatic was replaced with an all-new 7-speed and both the sedan and coupe gained a self-healing paint finish from the EX 35. The V36 platform continues for 2010 with numerous interior changes and upgrades as well as a mid-product cycle exterior update for the sedan.


2007–2008 G35 sedan

The G35 sedan underwent a major revision for the 2007 model year. This 2nd generation front-mid (FM) platform underpinning the new G is shared in part with the Infiniti M and has several structural reinforcements around the engine and rear floor area. Along with three times more laser welding and 16 percent more spot welds than the old version, overall body stiffness was improved by 40 percent. Single-pivot lower control arms in front replace the 1st gen model's twin lower links. The G35x sedan uses an ATTESA E-TS all-wheel drive system.

Along with these chassis refinements sport package equipped models get firmer rear shocks, bigger front brake calipers, and larger 13-inch (330 mm) rotors all around (up from 12.6/12.1-inch front/rear). Sport package equipped cars also get a viscous limited slip differential. An all-new Active Steering package can be ordered for sport package equipped models. It features a planetary gearset on the steering shaft (similar to BMW), that varies the steering ratio between 12.0:1 and 18.5:1. A rear-wheel steering system that induces up to one degree of rear steer is also included in this package. The Active Steering package includes even stiffer shocks than the sport package at all four corners and the ride has been repeatedly reported as being too stiff for most customers except the most "enthusiastic" drivers. Base and Journey model 17-inch (430 mm) tires bump up from 215s to 225s, while the 18-inch (460 mm) upgrade (included in sport or wheel package) with 225/50-ZR18 front and 245/45-ZR18 rear is now a size smaller in front and larger in back than the 1st gen model's all-around 235/45R18s.

The updated VQ35HR is more powerful (306 hp (228 kW) at 6,800 rpm and 268 ft·lbf (363 N·m) at 4,800 rpm), more fuel efficient, and more responsive than the previous VQ35DE. The "HR" stands for "High Revolution" or "High Response". A dual-path intake (two air cleaners, throttle bodies, etc.) lowers intake tract restriction by 18 percent and new equal-length exhaust manifolds lead into mufflers that are 25 percent freer flowing. The intake is said to benefit from a ram-air effect adding three horsepower at 60 mph. Electrically actuated variable valve timing is new on the exhaust cams which broadens the torque curve. The new engine block maintains the same bore and stroke, but the connecting rods were lengthened and the block deck was raised by 8.4 mm to reduce piston side-loads. 80% of the internal components have been strengthened or redesigned to handle the increased 7,500 rpm red line, along with the use of larger crank bearings with main bearing caps reinforced by a rigid ladder-type main cap girdle. With an increase in compression ratio from 10.3:1 to 10.6:1 these changes add 26 more horsepower. Torque is down 2 foot-pounds force (2.7 N·m) from the old DE engine (268 vs. 270). The engine now sits 15 mm lower in the chassis for a lower center of gravity.

Although the horsepower rating increases only 8 hp compared to the latest version of the previous "DE" engine, the real horsepower difference was much greater due to Nissan adopting the 2006 SAE hp measurement guidelines for horsepower ratings in 2007. According to Consumer Reports an Infiniti G35 Journey sedan with a 5-speed Automatic transmission can reach 0–60 mph (0–97 km/h) in 5.4 seconds, and the 1/4 mile (~400 m) 13.8 seconds. According to the also newly revised EPA guidelines, fuel economy is estimated at 17 mpg-US (14 L/100 km; 20 mpg-imp) in the city and 24 mpg-US (9.8 L/100 km; 29 mpg-imp) on the highway.[8] Fuel economy is virtually identical between generations, with the second generation earning a 1-mile-per-US-gallon (0.43 km/L; 1.2 mpg-imp) edge in highway driving (both measured using EPA 2008 guidelines)[9].

Second generation G35 performance: According to Motor Trend[10] and Automobile Magazine,[11] a previous model 2005 G35 6MT sedan reached 0-60 mph in 5.7 seconds and the 1/4 mile in 14.1 seconds. This gives the new 2nd gen G35 V36 sedan a solid 0.4 and 0.3 second performance advantage respectively. Five Speed automatics are on par with manual transmission cars from a performance perspective. In a 2008 Road & Track comparison test with the new 2008 Cadillac CTS a 5-speed auto transmission equipped G35 sedan achieved a 0-60 time of 5.3 seconds, a 0-100 time of 13.1 seconds and a 1/4 mile time of 13.8 seconds at 102.9 mph (165.6 km/h). Generally a V36 G35 reaches 60 mph in the low 5 second range; 100 mph in around 13 seconds and runs the quarter mile in about 13.8 seconds. The 200 lbs. heavier all wheel drive versions are only approx. 0.3 seconds behind in each of these measurements.

Models (including the 2009–present G37):

  • G35/G37 - 3.5/3.7 L V6, 306 hp (228 kW) / 328 hp (245 kW)
  • G35/G37 Journey - 3.5/3.7 L V6, 306 hp (228 kW) / 328 hp (245 kW)
  • G35x/G37x AWD - 3.5/3.7 L V6, 306 hp (228 kW) / 328 hp (245 kW) 4WD
  • G35/G37 Sport 6MT - 3.5/3.7 L V6, 306 hp (228 kW) / 328 hp (245 kW)

Infiniti Coupe Concept (2006)

It was a concept vehicle that became the basis of V36-based G coupe. It included a full-length glass panel roof, modulated front fenders and hood, deep front spoiler and large projector headlights, polished bare metal-look paint, compact camera outside rearview mirrors, hidden door handles and large 20-inch, 9-spoke painted aluminum-alloy wheels.

The vehicle was unveiled in 2006 North American International Auto Show.[12]


2008 G37 coupe

2008 Infiniti G37 Sport coupe

In 2007, the redesigned G coupe was unveiled at the 2007 New York International Auto Show[13] and was available for sale as a 2008 model.[14] Unlike the 2007 and 2008 G sedan it was given the new 3.7 L 330 hp (250 kW) V6 VQ37VHR engine but for this one model year still paired with the 5-speed automatic transmission and was named the "G37." In Japan, the G37 joined the updated G Sedan under the Nissan Skyline (V36) nameplate.[15] This also marks the first use of Nissan's VVEL (Variable Valve Event and Lift) system on a production vehicle in the US market.

2009 G37 Sedan and Coupe

G35/37 transmission gear ratios.

For the 2009 model the G35 sedan was replaced by the G37 sedan. The G37 sedan was first unveiled at the Geneva Motor Show for the European market.[16] Exterior, interior and options remain identical to the 2008 G35 model range but the sedan now also sports the 3.7-liter VQ37VHR "VVEL" V6, rated 328 hp (245 kW) at 7,000 rpm and 269 ft·lbf (365 N·m) at 5,200 rpm that was previously introduced in the G37 Coupe. Although the engine gains only 0.2 kg·m (2 N·m; 1 ft·lbf) peak torque over the VQ35HR and this torque value arrives at a later 5,200 rpm vs. 4,800 in the VQ35HR, the torque curve itself is improved and flattened across the rpm range via Nissan's new VVEL (Variable Valve Event and Lift) variable valve timing resulting in better throttle response and low rpm torque. The G37's VQ37VHR engine has been touted by car magazines and reviewers as an improvement over the VQ35HR engine mostly adding much refinement and smoother engine operation, especially at high rpm where the VQ35HR engine was frequently criticized for NVH and sounding strained, harsh and loud. The often criticized too aggressive clutch engagement, notchiness of the 6-speed manual in the G35 and engine vibrations transferred through the shifter and pedals in the G35 6MT cars was also addressed in the new G37 models.

Infiniti G37 convertible
Infiniti G37 cabrio

All 2009 models came standard with Infiniti's new 7-speed automatic transmission that was also introduced on the 2009 FX35 and FX50. A much welcomed improvement over the previous 5-speed box. As before to equip your G sedan with the optional 6-speed manual transmission the Sport 6MT model must be specified. Base, Journey and X models cannot be ordered with manual transmissions, however the Sport Package including all sport options of the 6MT model (except the manual trans) can be added to the Journey and X models.

The 2009 sport package (standard on Sport 6MT cars, optional on Journey and X models) now also included larger sport brakes with 4-piston front/2-piston rear calipers and large 14-inch (360 mm) front and 13.8-inch (350 mm) rear rotors and a new 18-inch (460 mm) sport wheel design. The G37 Sedan is available as G37, G37 Journey, G37S 6MT and G37x AWD models. Major option packages remain to be the Premium Package, Sport Package, Nav Package, Tech Package. All 2009 models come standard with self healing "Scratch Shield" paint which employs a soft polymer top coat that can self heal small scratches and swirl marks.

Even though the final drive ratio for vehicles equipped with the 7-speed auto has been (numerically) reduced from 3.69 to 3.36, the new auto has much lower first through fourth gear overall ratios than the old 5-speed auto and the 6-speed manual in the 6MT cars (which retain the old 3.69 final drive ratio). Giving it closer gear ratios in all gears to match engine rpm better with power demand and with the 7th gear being an overdrive to reduce highway cruising rpm and improve fuel mileage. The new 7-speed automatics retain the Drive Sport (DS) shift mode and Downshift Rev Matching (DRM) feature of the 5-speed auto.[17] The new engine/transmission combo did add some weight the car (3,590 lb. for the G37 vs. 3,508 for the G35 in identical trim).

G37x Coupe uses an ATTESA E-TS all-wheel drive system.

G37 coupe and sedan were set on sale in September 2008 as 2009 models.[18]

G37x Coupe and G37 sedan were unveiled in 58th annual Pebble Beach Concours d'Elegance.[19] Pictures of G37 convertible was first shown in Monterey, while the vehicle itself would be unveiled in 2008 Los Angeles Auto Show in November.[20]

The 2009 Infiniti G37 Anniversary Art Project Vehicle - This is a version of G37 Sport Coupe inspired by Cirque du Soleil to commemorate Infiniti's 20th anniversary. The vehicle was designed by Montreal artist Heidi Taillefer. The vehicle was set on tour at various Cirque du Soleil shows and other events, with eventual vehicle sale at charity auction.[21]

2009 G37 Convertible

G37 Convertible was introduced in June 2009 Media Release as a 2009 model on the V36 FM platform and is only from a design perspective based on the G Coupe.

The new G Convertible comes equipped with a standard 325-horsepower 3.7-liter V6, backed by a choice of a 7-speed automatic transmission with available magnesium paddle shifters or a responsive close-ratio 6-speed manual transmission – offering buyers the same high levels of performance as the G37 Sedan and G37 Coupe, along with the wide-open exhilaration of top-down driving.

2010 Infiniti G37

The 2009 Infiniti G37 Anniversary Art Project Vehicle

In January 2010, the 2010 G37 Coupe and Sedan went on sale. Changes include a new grill for the sedan, a new optional navigation system for both the coupe and sedan (revised from the optional system available with the 2008 and 2009 G37's), and other minor changes. A couple items that were options on the 2008 and 2009 G37's are now standard on the 2010 G37's also. The convertible has yet to be released as a 2010 model.


1991–1996 1999–2002 2003–2004 2005–2006 2007 2008 2009
Generation P10 P11 V35 V36 (sedan) V36
V35 (coupe)
Engine SR20DE 2.0 L (120 cu in)
140 bhp (100 kW)
132 ft·lbf (179 N·m) I4
SR20DE 2.0 L (120 cu in)
145 bhp (108 kW)
136 ft·lbf (184 N·m) I4
VQ35DE 3.5 L (210 cu in)
261 bhp (195 kW)
258 ft·lbf (350 N·m) V6
282 bhp (210 kW)
269 ft·lbf (365 N·m)
VQ35DE 3.5 L (210 cu in)
298 bhp (222 kW)
258 ft·lbf (350 N·m)
282 bhp (210 kW)
269 ft·lbf (365 N·m)V6
VQ35HR 306 bhp (228 kW)
268 ft·lbf (363 N·m) V6
VQ37VHR 3.7 L 328 hp (245 kW) 269 ft·lbf (365 N·m) V6
VQ35DE 298 bhp (222 kW)
269 ft·lbf (365 N·m) V6
VQ37VHR 3.7 L 330 hp (250 kW) 270 ft·lbf (370 N·m) V6
Transmission 5-speed Manual, 4-speed Automatic 6-speed Manual, 5-speed Automatic 6MT, 7AT
Curb Weight 2,535 lb (1,150 kg)-2,818 lb (1,278 kg)
(depending on options)
2,913 lb (1,321 kg)-2,981 lb (1,352 kg)
(depending on options)
Wheelbase 100.4 in (2,550 mm) 102.4 in (2,600 mm) 112.2 in (2,850 mm)
Length 000 in (0 mm) 177.5 in (4,510 mm) Sedan: 186.5 in (4,740 mm) Sedan: 187.0 in (4,750 mm)
Coupe: 182.2 in (4,630 mm) Coupe: 183.1 in (4,650 mm)
Width 66.7 in (1,690 mm) Sedan: 69.0 in (1,750 mm) Sedan: 69.8 in (1,770 mm)
Coupe: 71.5 in (1,820 mm) Coupe: 71.8 in (1,820 mm)
Height 000 in (0 mm) 55.1 in (1,400 mm) Sedan: 000 in (0 mm) Sedan: 000 in (0 mm)
Coupe: 000 in (0 mm) Coupe: 000 in (0 mm)


The current generation of the G features standard dual front airbags, front and rear side curtain airbags, and front side torso airbags. It was rated "Acceptable" by the IIHS. However, an Insurance Institute for Highway Safety's Status Report, released in 2007, ranked the 2003-4 Infiniti G35 as the safest car in the Luxury Mid-size category and the second safest vehicle Overall, based on its observed fatal-accidents rate.[22]


The G has earned many automotive awards over its lifespan:

  • Car and Driver: 1991 (April & September) High marks for suspension and value.
  • IntelliChoice: 1993 “Best Overall Import Car Value Over $13,000” and “Best Value in Compact Class Over $16,000.”[23]
  • J.D. Power and Associates: 1996 Top Score in Customer Satisfaction Index.[24]
  • J.D. Power and Associates: 1997 Second Highest Scorer in Customer Satisfaction Index.
  • IntelliChoice: 1999 G20 and G20t “A Best Overall Value - Compact Sedan Over $15,000.”[25]
  • Consumer Reports First Place: Top 10 Cars (upscale sedan category) for 2007 and 2008
  • CAR Magazine: Rated One of the Top 10 Best Handling Cars in the World (P11)
  • Car and Driver "10 Best Cars" list.[26]


  1. ^ "Auto to 6spd Starts". 2007. 
  2. ^ a b c d e Winfield, Barry (1998). Infiniti G20 (September 1998 ed.). Car and Driver. 
  3. ^ Coleman, Dave (1998). Technobabble: Multilink and the Beam (November 1998 ed.). Sport Compact Car. 
  4. ^ "Stay Tuned" auto modifiers of New York City, as posted on
  5. ^ Consumer complaints about Infiniti Brakes
  6. ^ The Improved 2005 Infiniti G35 Still Has Room for Improvement - 2005 Infiniti G35 -
  7. ^ "Infiniti Announces Pricing on 2005 G35 Sedan and Coupe". Motor Trend. October 2004. Retrieved 2008-05-03. 
  8. ^ Error Page
  9. ^ 2008 Fuel Economy Tests
  10. ^ Reynolds, Kim (June 2005). "Road Test: Rear Drive vs. Front Drive vs. All-Wheel Drive". Motor Trend. Retrieved 2008-05-05. 
  11. ^ Lorio, Joe (August 2005). "2005 BMW 330i, 2005 Cadillac CTS, and 2005 Infiniti G35". Automobile Magazine. Retrieved 2008-05-05. 
  12. ^ UPDATE: Infiniti Coupe Concept - official photos and press release
  13. ^ "2007 New York Auto Show Preview: Curvaceous 2008 Infiniti G37 Coupe To Debut". Inside Line. May 3, 2007. Retrieved August 2, 2007. 
  14. ^ "Infiniti Announces Pricing on 2008 G37 Coupe". Nissan • Infiniti News Bureau. August 1, 2007. Retrieved August 2, 2007. 
  15. ^ "Nissan Skyline Coupe Announced In Japan". Serious Wheels. April 24, 2007. 
  16. ^ 2008 Infiniti G37 Sedan
  17. ^ "2009 Infiniti G37x Coupe Review". 
  18. ^ Nissan confirms G37 Sedan, G37 Convertible and G37x Coupe
  19. ^ Monterey 2008: Infiniti releases G37x coupe, G37 sedan, revised M35
  20. ^ Infiniti G37 Convertible revealed ahead of L.A.
  21. ^ Hand-painted G37 Coupe inspired by Cirque du Soleil commemorates Infiniti's 20th Anniversary
  22. ^ Drivers deaths by make and model: fatality risk in one vehicle versus another Insurance Institute for Highway Safety, Status Report, Vol. 42, No. 4, April 19, 2007.
  23. ^ Infiniti History and Highlights: Inception to 2004. Concept Carz. 2004.,0/makeHistory.aspx. 
  24. ^ Infiniti Ranked #1 Carline in the 1996 J.D. Power and Associates Customer Satisfaction Study. Nissan & Infiniti News Bureau. 1996. 
  25. ^ Infiniti G20 and QX4 Named “A Best Overall Value”. Nissan & Infiniti News Bureau. 1999. 
  26. ^


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