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{{Use American English|date=August 2024}}
{{Short description|Executive car by Infiniti (1989 - 2019)}}
{{Infobox automobile
| name = Infiniti M
| image = 2011 Infiniti M37 -- NHTSA 1.jpg
| manufacturer = [[Nissan]]
| aka = [[Infiniti Q70]] (2013–2019)<ref name="AB Q70">{{cite web |url=https://www.autoblog.com/2019/10/25/infiniti-q70-cancelled-for-2020/|title=Infiniti Q70 won't live to see 2020|work=[[Autoblog (website)|Autoblog]]|last=Palmer|first=Zac|date=25 October 2019}}</ref><br/>[[Nissan Fuga]] (SWB; 2009–2022)<br/>[[Nissan Cima]] (hybrid LWB; 2012–2022)
| caption = 2011 Infiniti M37
| production = {{ubl | 1989–1992 (M30 coupé)<br />2002–2019 (M sedan)}}
| predecessor = [[Infiniti I]]<br />[[Infiniti J30]]
| successor = [[Infiniti Q70]] (renamed to)
| class = [[Executive car]]
| body_style = 4-door [[sedan (car)|sedan]]
| platform = [[Nissan FM platform]]
}}

The '''Infiniti M''' is a line of mid-size luxury (executive) cars from the [[Infiniti]] luxury division of [[Nissan]]. From 2013 (model year 2014) on it has been marketed as the '''Infiniti Q70''', reflecting the company's later naming formula.

The first iteration was the M30 Coupé/Convertible, rebadged variants of the JDM [[Nissan Leopard]]. After a hiatus, the M nameplate was used for Infiniti's short-lived mid-luxury M45 sedan, a rebadged version of the Japanese-spec [[Nissan Gloria]] and Infiniti's subsequent  flagship M35/45 and M37/56/35h/30d, based on the JDM [[Nissan Fuga]].

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== {{anchor|F31}} First generation (1989–1992) ==
{{Infobox automobile
| name = Infiniti M30
| image = 1991 Infiniti M30 2.2.18.jpg
| production = 1989–1992
| model_years = 1990–1992
| class = [[Mid-size car]]/[[Executive car]]
| body_style = 2-door [[convertible]]<br />2-door [[coupé]]
| engine = 3.0 L ''[[Nissan VG engine#VG30E|VG30E]]'' [[V6 engine|V6]]
| transmission = 4-speed ''[[Jatco 4R01 transmission|RE4R01A]]'' [[automatic transmission|automatic]]
| related = [[Nissan Skyline#R31|Nissan Skyline R31]]<br/>[[Nissan Laurel#Fifth generation (C32) (1984–1989)|Nissan Laurel C32]]<br/>[[Nissan Cefiro#A31 (1988–1993)|Nissan Cefiro A31]]<br/>[[Autech|Autech Zagato Stelvio AZ1]]
| layout = [[Front-engine, rear-wheel-drive layout|Front-engine, rear-wheel-drive]]
| successor = [[Infiniti G37#G37 sedan, G37X coupe, G37 convertible|Infiniti G37]] Cabrio
| assembly = Japan: [[Musashimurayama, Tokyo]]
| weight = {{convert|1498|kg|lb|0|abbr=on}} (coupe)<br />{{convert|1622|kg|lb|0|abbr=on}} (convertible)
| aka = [[Nissan Leopard]]
| wheelbase = {{convert|103.0|in|mm|0|abbr=on|disp=flip}}
| length = {{convert|188.8|in|mm|0|abbr=on|disp=flip}}
| width = {{convert|66.5|in|mm|0|abbr=on|disp=flip}}
| height = {{convert|52.0|in|mm|0|abbr=on|disp=flip}}
| model_code = F31
}}
The '''Infiniti M30''' was a 2-door [[coupé]] based on the Japanese market Nissan Leopard (chassis code F31). It was launched in 1989 for the 1990 model year as a lower-priced alternative to the [[Infiniti Q45]], and was intended to be an alternative to the [[Acura Legend#First generation (1986)|Acura Legend]] coupe and to a lesser extent the [[Lexus ES 250]], as it was also a lower-priced alternative to the [[Lexus LS400]], although the ES 250 was only offered as a 4-door sedan.

Unlike its competitors that were designed with the American market in mind and were launched as brand-new models, the M30 was based on a somewhat dated platform that was originally designed for the Japanese market; when the Leopard was imported to the United States, few changes were made to the exterior but the interior was revised to better suit American tastes; a leather interior was standard in the M30, and several features in the Leopard such as a center-mounted television screen and a digital instrument cluster weren't available in the M30 as those features were perceived as gimmicks in western car markets.

The M30's angular design aesthetics and on-road performance were viewed as outdated, especially considering a redesigned [[Acura Legend]] coupe was launched in 1991. The interior came in for criticism for its outdated ergonomics and lack of room. While the Japanese-market Leopard had received a new dashboard along with the 1988 facelift, economics precluded making a left-hand-drive version of the new dashboard and the M30 was instead fitted with the LHD version of the [[Nissan Skyline#R31|R31 Skyline]]'s rectilinear dashboard, first presented in 1985.<ref name="oldmotors1">{{cite web | url =https://oldmotors.net/infiniti-m30-the-leopards-different-spots/ | archive-url = https://web.archive.org/web/20211022131146/https://oldmotors.net/infiniti-m30-the-leopards-different-spots/ | archive-date = 2021-10-22 | date = 2020-07-18 | title = Infiniti M30: The Leopard's Different Spots | work = Old Motors }}</ref>

The M30 made up for these deficiencies in its somewhat lower price; whereas the 1990 Acura Legend coupe started at $27,325 before options and the 1990 [[BMW 3 Series (E30)|BMW 325i]] started at $24,650 before options, the M30 started at $23,500, and had no factory options, per Infiniti's pricing structure used at the time. Dealerships offered an in-car cellular telephone and in-dash CD player as optional accessories, amongst other items.

===Overview===
Standard equipment on the M30 included a driver's side airbag, anti-lock brakes, an anti-theft security system with an engine immobilizer, Nissan Sonar Suspension II, and leather upholstery. Other standard features include a 4 speaker Nissan-Bose audio system with satellite radio controls, a cassette player and an electric mast antenna, cruise control, power windows, power door locks, power mirrors, power moonroof, and on coupes, automatic climate control.

For the 1991 model year, the cable-type speedometer became electric, instrument cluster typeface changed to match that of the Q45, and fuel and coolant temperature gauges were switched. An illuminated entry feature was added that would light the driver's and passenger's door keyhole and the interior dome light upon pulling the outer door handle. Selective door lock logic was added that allowed unlocking of the passenger door from the driver's keyhole by turning the key twice. 

A convertible was introduced for the 1991 model year. All convertibles originated as coupe models, and were shipped to California and converted by [[American Sunroof Company|American Sunroof Corporation]] (ASC). The electric canvas top featured fully automatic push-button operation, similar to the redesigned [[Mercedes-Benz SL-Class (R129)|1990 Mercedes-Benz SL]], although the SL used a hydraulic system. Unlike the coupe, the M30 convertible use manual climate controls, and a Bose ''Active Sound'' audio system. The convertible top used a plastic rear window; as a result the rear window defroster feature used on the coupe was removed, and buttons to raise and lower the convertible top were put in place of the rear window defroster switch. The convertible model was never officially sold in Japan, and was exclusive to the US market, although convertibles have been imported to Japan in the last few years by collectors.

All 1992 models gained the addition of a central locking switch next to the Sonar Suspension II selector, and the intake plenum cover was revised and displayed the Infiniti logo, rather than the Nissan logo and the "V6 3000" script on 1990 and 1991 cars.

The M30 was discontinued after the 1992 model year following a production run of approximately 17,000 cars. It was replaced in the Infiniti lineup by the J30 sedan, which was based on the F31 Nissan Leopard's successor, the Nissan Leopard J. Ferie (chassis code Y32).

=== Technical ===
Power came from Nissan's [[VG30E]] V6, which produced {{Convert|162|hp|kW PS|0|abbr=on}} at 6000 rpm, and {{Convert|180|lbft|Nm|0|abbr=on}} of torque at 3500 rpm. All M30s had a [[Jatco]] RE4R01A 4-speed automatic transmission. The differential was a Nissan open R200 unit. Although most Nissan Leopards were equipped with a DOHC V6, offered in 2-liter, 3-liter, naturally aspirated and turbocharged variants, the M30 was only offered with the SOHC VG30E. Although it was a smooth powertrain, which Infiniti touted in its brochures for the M30, the {{Convert|3302|lb|kg|0|abbr=on}} coupe, and 3,523 lb (1,598 kg) convertible were generally received as overweight and underpowered, with a quoted 0–60 time of 9.4 and 9.7 seconds, respectively. Infiniti marketed the car as a luxury sports coupe, but its relatively low power output, comfort-oriented driving dynamics, and the absence of a manual transmission hampered its performance and sporting image.

Like the Nissan Maxima, the M30 was equipped with Nissan's [[Super Sonic Suspension|Sonar Suspension II]]. A sonar sensor mounted underneath the front bumper scanned the road surface ahead of the vehicle and instantly changed damping based on varying road surfaces, using individual actuators on all shock absorbers. A center console-mounted switch allowed drivers to choose between Comfort (soft) and Sport (firm) suspension modes. All M30s used [[MacPherson strut]]s for the front wheels, and a [[Independent suspension|semi-trailing arm]] rear suspension with coil springs for the rear.
[[File:Infiniti M30 Convertible red.jpg|left|thumb|1990–1992 M30 convertible]]
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== {{anchor|Y34}} Second generation (2002–2004) ==
{{Infobox automobile
| name = Infiniti M
| image = '03-'05 Infiniti M45.jpg
| production = 2002 – December 2004
| model_years = 2003–2004
| assembly = Japan: [[Kaminokawa, Tochigi]]
| engine = 4.5L ''[[Nissan VK engine#VK45DE|VK45DE]]'' {{Convert|340|hp|kW|0|abbr=on}} [[V8 engine|V8]]
| related = [[Infiniti Q45]]<br />[[Nissan Cima]]<br />[[Nissan Gloria]]
| aka = [[Nissan Cedric#Tenth generation Y34|Nissan Cedric]]<br>[[Nissan Gloria#Eleventh generation Y34|Nissan Gloria]]
| layout = [[FR layout]]
| transmission = 5-speed [[automatic transmission|automatic]]
| wheelbase = {{convert|110.2|in|mm|0|abbr=on|disp=flip}}<ref>{{cite web | url = https://www.automobile-catalog.com/car/2004/2159720/nissan_gloria_gran_turismo_300sv.html| title = 2004 Nissan Gloria Gran Turismo 300SV (aut. 4) (model up to April 2004 for Japan) car specifications & performance data review| access-date=December 27, 2020 | work=automobile-catalog.com}}</ref>
| length = {{convert|197.2|in|mm|0|abbr=on|disp=flip}}<ref>{{cite web | url = https://www.automobile-catalog.com/make/infiniti/m45/m45_y34/2004.html| title = 2004 Nissan Cedric 300LV VIP (aut. 4) (model up to October 2004 for Japan) car specifications & performance data review| access-date=December 27, 2020 | work=automobile-catalog.com}}</ref>
| width = {{convert|69.7|in|mm|0|abbr=on|disp=flip}}
| height = {{convert|57.6|in|mm|0|abbr=on|disp=flip}}
| weight = {{Convert|1747|kg|lb|0|abbr=on|disp=flip}}
| model_code = Y34
}} 
[[Infiniti]] M45 was designed in 2000 at the Nissan Technical Center (NTC) in Atsugi, Japan;<ref name="msn">{{cite web |title=2004 Infiniti M45 |publisher=MSN |url=http://autos.msn.com/research/vip/overview.aspx?year=2004&make=Infiniti&model=M45 |access-date=2011-11-24 |archive-url=https://web.archive.org/web/20080510063051/http://autos.msn.com/research/vip/overview.aspx?year=2004&make=Infiniti&model=M45 |archive-date=2008-05-10 |url-status=dead }}</ref> was manufactured in Tochigi, Japan;<ref name="msn"/> and is based on eleventh generation, Y34-series [[Nissan Gloria]]. In contrast to the Japanese models, which were available only with 6-cylinder engines, the M45 was powered by Nissan's [[Nissan VK engine#VK45DE|VK45DE]] [[V8 engine|V8]], producing {{Convert|340|hp|kW|0|abbr=on}} and {{convert|333|lbft|Nm|0|abbr=on}} of [[torque]], which it shared with the [[Infiniti]]'s flagship [[Infiniti Q45|Q45]].<ref>{{cite web |url=http://www.jbcarpages.com/infiniti/m/2003/ |title=2003 Infiniti M45 Review |publisher=JB car pages}}</ref>

In addition to the difference in powertrain with the Y34 Cedric/Gloria, the Y34 M45 uses a different instrument panel design, similar to the F50 Q45 as well as a different rear multi-link suspension design. The Y34 Cedric/Gloria's rear multi-link suspension design is similar to the Nissan Z32 300ZX, and Nissan S14/S15 Silvia/200SX/240SX where the rear spring is mounted on the strut. The rear suspension design on the Y34 M45 is much like the rear suspension design on the Nissan Z33 350Z, where the spring is mounted independent of the shock/strut, and sits directly on the lower arm, in a spring cup.{{cn|date=January 2022}}

The front suspension design carries over from the Y33 Q45, with a one-piece strut/upright. In place of the stamped steel front lower arm, the Y34 M45 has a cast aluminum lower A-arm.[[File:2003 Infiniti M45 rear left side.jpg|thumb|left|2003–2004 Infiniti M45]]
The M45 broadened Nissan's use of the 4.5L V8 that had been exclusive to the [[Infiniti Q45|Q45]], allowing the company to better amortize the engine's development cost.
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=={{anchor|Y50}} Third generation (2005–2010)==
{{Infobox automobile
| name = Infiniti M
| image = 2006-07 Infiniti M35.jpg
| production = December 2004–2010
| assembly = Japan: [[Kaminokawa, Tochigi]]
| model_years = 2006–2010
| related = [[Infiniti FX]]<br />[[Infiniti G35]]<br />[[Nissan 350Z]]<br />[[Infiniti G37]]<br />[[Infiniti EX35]]
| platform = [[Nissan FM platform|FM-L "enhanced FM"]]
| engine = 3.5L {{Convert|280|hp|kW|0|abbr=on}} ''[[Nissan VQ engine#VQ35DE|VQ35DE]]'' [[V6]]<br />3.5L {{Convert|303|hp|kW|0|abbr=on}} ''[[Nissan VQ engine#VQ35HR|VQ35HR]]'' [[V6]]<br />4.5L {{Convert|325 |hp|kW|0|abbr=on}} ''[[Nissan VK engine#VK45DE|VK45DE]]'' [[V8 engine|V8]]
| aka = [[Nissan Fuga]]
| wheelbase = {{Convert|2901|mm|in|1|abbr=on}}
| layout = [[Front-engine, rear-wheel-drive layout|Front engine]], [[rear-wheel drive]] / [[All-wheel drive]]
| length = 2006–07: {{Convert|4892|mm|in|1|abbr=on}}<br />2008–2010: {{Convert|4930|mm|in|1|abbr=on}}
| width = {{Convert|1798|mm|in|1|abbr=on}}
| transmission = 5-speed [[automatic transmission|automatic]]; 7-speed [[automatic transmission|automatic]]
| height = {{Convert|1509|mm|in|1|abbr=on}} (M35 & M45)<br /> {{Convert|1511|mm|in|1|abbr=on}} (M35 & M45 Sport)<br />M35x: {{Convert|1524|mm|in|1|abbr=on}}
| designer = Michinari Chiba (2002)<ref>{{cite web |url=http://archive.cardesignnews.com/autoshows/2004/newyork/highlights/index10.html |title=New York Auto Show 2004 Highlights |access-date=2013-07-13 |url-status=dead |archive-url=https://web.archive.org/web/20070807164711/http://archive.cardesignnews.com/autoshows/2004/newyork/highlights/index10.html |archive-date=2007-08-07 }}</ref><ref>{{cite web |url=http://oami.europa.eu/RCDOnline/RequestManager |url-status=dead |archive-url=https://web.archive.org/web/20060705171238/http://oami.europa.eu/RCDOnline/RequestManager |archive-date=2006-07-05 |title=OAMI-ONLINE – RCD-ONLINE – Design consultation service – Basic search}}</ref>
| model_code = Y50
}}

Infiniti released a redesigned M for the 2006 model year, released in February 2005, and marketed in Japan as the [[Nissan Fuga]]. [[All-wheel-drive]] models, marketed as the '''M35x''' and '''M45x''', use a system ([[ATTESA-ETS]]) to send all power to the rear wheels until slip is detected. As the Q45 was no longer exported from Japan after model year 2006, the M45 became Infiniti's flagship.

[[File:'09 Infiniti M45x (Rear, MIAS).JPG|thumb|left|Infiniti M45x rear]]

The M used a more rigid version of the [[Nissan FM platform]] shared with the [[Infiniti G35|G35]]/[[Nissan 350Z|350Z]]/[[Infiniti FX|FX]] — and was available with the VQ-series {{convert|280|hp|kW|0|abbr=on}} 3.5 L [[V6]] in the '''M35''', or the [[Infiniti Q45|Q45]]'s {{convert|335|hp|kW|0|abbr=on}} 4.5 L [[V8 engine|V8]] in the '''M45'''.<ref name="2006jb">{{cite web |url=http://www.jbcarpages.com/infiniti/m/2006/ |title=2006 Infiniti M35 & M45 Review |publisher=JB car pages}}</ref> 

While shorter {{Convert|177|mm|in|1|abbr=on}} than the last [[Infiniti Q45|Q45]] at {{Convert|5069|mm|in|1|abbr=on}}, the M offered greater interior space, performance, a rear [[multilink suspension]] and front [[double wishbone suspension|double wishbone]], and improved ergonomics as well as a {{Convert|30|mm|in|1|abbr=on}} longer wheelbase. 

===Reception===
The automotive press the Y50 Infiniti M several praised the M35 and M45's driving involvement and handling dynamics vs the GS and E-Class while having superior ergonomics to the 5 Series; furthermore the M was equipped and priced competitively against its German rivals,<ref>{{cite news |url=https://www.nytimes.com/2005/06/26/automobiles/26AUTO.html |work=The New York Times |title=2006 Infiniti M35 and M45: The Japanese Take the Driver's Seat |first=Michelle |last=Krebs |date=2005-06-26}}</ref><ref>{{cite web |url=http://www.motortrend.com/roadtests/sedans/112_0511_sideways/index6.html |title=2005 BMW 545i vs. 2005 Cadillac STS V8 vs. 2006 Infiniti M45 Sport vs. 2005 Mercedes-Benz E500 – Road Test |publisher=Motor Trend |access-date=2011-10-11}}</ref> while the M35 also received strong reviews.<ref>{{cite web |url=http://motortrend.automotive.com/89321/112-0503-luxury-sport-comparison/2005-infiniti-m35.html |title=2005 Infiniti M35 &#124; Infiniti M45 Enthusiast Article at Automotive.com |publisher=Motortrend.automotive.com |access-date=2011-10-11 |url-status=dead |archive-url=https://web.archive.org/web/20111005013040/http://motortrend.automotive.com/89321/112-0503-luxury-sport-comparison/2005-infiniti-m35.html |archive-date=2011-10-05 }}</ref> Despite entering a very crowded, competitive segment in which almost every member has been recently redesigned, the M managed to claim several key distinctions. The M is near or at the top of its class of every interior dimension, actually breaking into the [[United States Environmental Protection Agency]] "large" category depending on which option packages are selected.<ref>{{cite web |url=http://www.edmunds.com/infiniti/m45/review.html |title=Infiniti M45 Review |publisher=Edmunds}}</ref><ref>{{cite web |url=http://www.edmunds.com/infiniti/m35/review.html |title=Infiniti M35 Review |publisher=Edmunds}}</ref><ref>{{cite web |url=http://usnews.rankingsandreviews.com/cars-trucks/2009-Infiniti-M/ |title=2009 Infiniti M Reviews |publisher=U.S. News}}</ref> The '''[[Infiniti M#Third generation (2005–2010)|M35x]]''' won ''[[Consumer Reports]]'' top luxury car pick for 2006, taking the top spot from the 2005 [[Lexus LS|Lexus LS 430]].

The Infiniti M did not gain a significant share in the mid-luxury market. The [[Infiniti G]]37 sedan and coupe, competing in the entry-level luxury sport category, accounted for half of the marque's sales as of 2009.<ref name="Ulrich">{{cite news |url=https://www.nytimes.com/2010/06/20/automobiles/autoreviews/20WHEEL.html |work=The New York Times |title=Zen and the Art of Image Maintenance |first=Lawrence |last=Ulrich |date=2010-06-18}}</ref> Out of that year's 81000 Infiniti cars sold, only 10000 were of the M nameplate.<ref name="caranddriver.com">{{cite web |url=http://www.caranddriver.com/reviews/car/10q1/2011_infiniti_m37_m56-first_drive_review |title=2011 Infiniti M37 / M56 – First Drive Review – Auto Reviews |publisher=Car and Driver |access-date=2010-10-11 |url-status=dead |archive-url=https://web.archive.org/web/20101126135334/http://www.caranddriver.com/reviews/car/10q1/2011_infiniti_m37_m56-first_drive_review |archive-date=2010-11-26 }}</ref> Furthermore, the 2009 update left M35 and M45 in awkward positions of the Infiniti lineup, as though they were the flagships of the marque, they were out-powered by the [[Nissan VQ engine#VHR series|VQ37VHR]] engines fitted in the [[Infiniti G#Fourth generation (V36, 2007-present)|2009 G37 coupe and sedan]]. For that model year while the G Series received 7-speed automatic transmissions across the lineup, only the M35 RWD was upgraded to a 7-speed automatic while the rest of the nameplate retained the aging 5-speed automatic.<ref>{{cite web |url=http://www.caranddriver.com/reviews/car/10q2/2011_infiniti_m37-short_take_road_test |title=2011 Infiniti M37 – Short Take Road Test – Auto Reviews |publisher=Car and Driver |access-date=2011-10-11 |url-status=dead |archive-url=https://web.archive.org/web/20110904024022/http://www.caranddriver.com/reviews/car/10q2/2011_infiniti_m37-short_take_road_test |archive-date=2011-09-04 }}</ref>

===2008/2009 Mid-generational refresh===
[[File:2008 Infiniti M35X.jpg|thumb|left|2008 Infiniti M35x]]
For the 2008 model year, the Infiniti M received a [[Facelift (automobile)|facelift]], receiving optional all wheel drive (M45x), revised front and rear fascias, revised tail lights, and redesigned blue-highlighted gauges, previously orange. Infiniti also offered an S type version for the M45/M45x similar to the previous Sport model. Other new features on the 2008 model include touch screen hard drive based navigation, iPod integration, and a music hard drive.

For 2009, the M35 received a new V6 engine producing {{Convert|303|hp|0|abbr=on}} and {{Convert|262|lbft|0|abbr=on}} of torque and a 7-speed automatic transmission. The 2009 M35x, M45, and M45x retained the five-speed automatic.<ref>{{cite web |url=http://www.jbcarpages.com/infiniti/m/2009/ |title=2009 Infiniti M35 & M45 Review |publisher=JB car pages}}</ref>

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== {{anchor|Y51}} Fourth generation (2010–2019) ==
{{Infobox automobile
| name = Infiniti M / Q70
| image = Infiniti M37 S (Y51) – Frontansicht, 28. Mai 2011, Düsseldorf.jpg
| caption = Infiniti M37 S (Europe)
| production = December 2009–2019
| model_years = 2011–2019 (USA & Canada)<ref name="AB Q70"/>
| platform = [[Nissan FM platform|FM-L "enhanced FM"]]
| assembly = Japan: [[Kaminokawa, Tochigi]]; <br /> Russia: [[Saint Petersburg]] (SKD, 2012–2014)<ref>{{cite web |url=http://wroom.ru/en/news/2272 |title=Infiniti cars are not assembled in Russia any more |author=<!--Staff writer(s); no by-line.--> |date=9 June 2014 |website=Wroom.ru |publisher=30 June 2014 |url-status=dead |archive-url=https://web.archive.org/web/20140725012225/http://wroom.ru/en/news/2272 |archive-date=25 July 2014 }}</ref>
| related = [[Infiniti FX]]<br />[[Infiniti G35]]<br />[[Infiniti G37]]<br />[[Infiniti EX35]]<br />[[Nissan 370Z]]<br />[[Nissan 350Z]]<br />[[Nissan Cima#Y51|Nissan Cima]]
| engine = 2.5L V6 ''[[Nissan VQ engine#VQ25HR|VQ25HR]]''<br />3.0L V6 ''[[V9X engine|V9X]]'' [[turbo diesel]]<br />3.5L V6 ''[[Nissan VQ engine#VQ35HR|VQ35HR]]'' [[Hybrid electric vehicle|hybrid]]<br />3.7L V6 ''[[Nissan VQ engine#VQ37VHR|VQ37VHR]]''<br />5.6L V8 ''[[Nissan VK engine#VK56VD|VK56VD]]''
| motor = 68PS Nissan HM34 high-response Motor (3.5 L models only)
| aka = {{unbulleted list
  | [[Nissan Fuga#Second generation (Y51, 2009)|Nissan Fuga]]/[[Mitsubishi Proudia#Series BY51 (2012–2016)|Mitsubishi Proudia]]/[[Infiniti Q70]] 
  | [[Nissan Cima#Fifth generation (Y51; 2012)|Nissan Cima]]/[[Mitsubishi Dignity#Series BHGY51 (2012–2016)|Mitsubishi Dignity]]/[[Infiniti Q70|Infiniti Q70L]] (LWB)
  }}
| wheelbase = {{Convert|2900|mm|in|1|abbr=on}}<br />{{Convert|3051|mm|in|1|abbr=on}} (Q70L)
| layout = [[Front-engine, rear-wheel-drive layout|Front engine]], [[rear-wheel drive]] / [[All-wheel drive]]
| length = {{Convert|4945|mm|in|1|abbr=on}}<br />{{Convert|5131|mm|in|1|abbr=on}} (Q70L)
| width = {{Convert|1845|mm|in|1|abbr=on}}
| transmission = 7-speed [[automatic transmission|automatic]]
| battery = 1.4 kWh [[lithium-ion battery|Li-ion]]
| drivetrain = [[Hybrid vehicle drivetrain#Parallel hybrid|Intelligent Dual Clutch Control]]
| height = {{Convert|1509|mm|in|1|abbr=on}}
| designer = Hideo Komuro (2007, 2008)
| model_code = Y51
}}

{{Multiple image | align = left | direction = vertical | width =
| image1 = Infiniti M30d S (Y51) – Heckansicht (1), 26. März 2011, Ratingen.jpg
| caption1 = Infiniti M30d S (Germany)
| image2 = Infiniti M35 Hybrid - Flickr - David Villarreal Fernández.jpg
| caption2 = Interior
}}

The Y51, designed by Hideo Komuro during 2006 and 2008 under the supervision of [[Shiro Nakamura]], took on a more fluid look,<ref name="Ulrich"/><ref name="caranddriver.com"/><ref>{{cite web |url=http://www.thetruthaboutcars.com/review-2011-infiniti-m37/ |archive-url=https://web.archive.org/web/20100530102520/http://www.thetruthaboutcars.com/review-2011-infiniti-m37/ |url-status=dead |archive-date=May 30, 2010 |title=Review: 2011 Infiniti M37 |date=28 May 2010 |publisher=The Truth About Cars |access-date=2010-10-11 }}</ref> recalling the [[coke bottle styling]] of a 1960s and 1970s.

The 2011 Infiniti M debuted at the 59th Annual [[Pebble Beach Concours d'Elegance]],<ref>{{cite web |last=Lavrinc |first=Damon |url=http://www.autoblog.com/2009/08/14/monterey-2009-2011-infiniti-m-makes-virtual-reveal-in-pebble/ |title=Monterey 2009: 2011 Infiniti M makes virtual reveal in Pebble |publisher=Autoblog.com |date=2009-08-14 |access-date=2010-10-11}}</ref> and at a media event in [[Beverly Hills, California]] in December 2009, to coincide with the [[LA Auto Show]] in Los Angeles.<ref>{{cite web |url=http://www.nissannews.com/newsrelease.do?id=970&mid=1 |title=Nissan/Infiniti News Room |publisher=Nissannews.com |access-date=2010-03-07 |url-status=dead |archive-url=https://web.archive.org/web/20100212142822/http://www.nissannews.com/newsrelease.do?id=970&mid=1 |archive-date=2010-02-12 }}</ref> The production version went on sale globally starting in the spring of 2010, as a 2011 model — and in the US on March 1, 2010. It was launched in Europe at the [[Geneva Motor Show#2010|2010 Geneva Motor Show]].

A driving mode selector was included on all models, situated below the transmission gear lever and between the heated and ventilated front seat controls, providing four selections labeled "Standard", "Sport", "Eco", and "Snow", allowing the 7-speed transmission, engine and various systems to optimize driving in varying conditions. To minimize intrusion of exhaust noise in the passenger compartment, the M included a noise cancelling system marketed as ''Active Noise Control''. Double-piston shock absorbers, developed by Kayaba Industry Company, have replaced those previously supplied by [[Hitachi]].

The 5.6L V8 [[Nissan VK engine#VK56VD|VK56VD]] in the Infiniti M56 was competitive with other V8 mid-luxury (executive) cars such as the BMW 550i and Mercedes-Benz E550.<ref>{{cite web |last=Monticello |first=Mike |url=http://www.insideline.com/bmw/5-series/2011/2011-bmw-550i-vs-2011-infiniti-m56-comparison-test.html |title=2011 BMW 550i vs. 2011 Infiniti M56 Comparison Test |work=Insideline |publisher=Insideline.com |date=2010-12-28 |access-date=2011-10-11}}</ref><ref>{{cite web |last=Riches |first=Erin |url=http://www.insideline.com/mercedes-benz/e-class/2010/2011-infiniti-m56-vs-2010-mercedes-benz-e550-comparison-test.html |title=2011 Infiniti M56 vs. 2010 Mercedes-Benz E550 Comparison Test |work=Insideline |publisher=Insideline.com |date=2010-04-05 |access-date=2011-10-11}}</ref><ref>{{cite web |url=http://www.roadandtrack.com/tests/video/2011-infiniti-m56-vs.-2010-mercedes-benz-e550 |title=2011 Infiniti M56 vs. 2010 Mercedes-Benz E550 – Exclusive Comparison Video at |work=Road & Track |date=2010-11-15 |access-date=2011-10-11 |url-status=dead |archive-url=https://web.archive.org/web/20111012145359/http://www.roadandtrack.com/tests/video/2011-infiniti-m56-vs.-2010-mercedes-benz-e550 |archive-date=2011-10-12 }}</ref> The 5.6L V8 is not shared with its Japanese domestic market counterpart, the [[Nissan Fuga#Y51|Nissan Fuga]], as Nissan opted instead to have the hybrid version as the performance option. The extended length version of the Fuga, known as the [[Nissan Cima#Y51|Cima]], is offered as the Infiniti Q70L beginning from model year 2015.

The M37 and M56 will have [[ATTESA|all-wheel drive]] optional, badged as M37x and M56x, respectively.

Safety technology included [[Lane Departure Prevention]], which uses a small camera mounted above the rearview mirror to gauge distance from the lane markers, and would lightly deploy selected brakes to help ease the car into the correct lane. It allowed for unimpeded lane changes when the turn signal is used and yields control to the driver at all times. [[Blind Spot Intervention System]] used sensors to provide a visual warning in the side view mirror. If the car sensed movement toward an obstacle, it provided an audible warning and applied opposite side brakes to guide the vehicle to the correct lane.

===Safety===
The third generation Infiniti M models were given a "Top Safety Pick" by the [[Insurance Institute for Highway Safety]] (IIHS) by earning a "Good" score for all four IIHS crash tests while also featuring standard stability control to help avoid accidents altogether.

===Engines===
{|class="wikitable sortable collapsible"
|+Gasoline engines
!Model!!Years!!Type/code!!Power, torque@rpm
|-
|M25||2011–||{{convert|2495|cc|cuin||abbr=on}} V6 24-valve ([[Nissan VQ engine#VQ25HR|VQ25HR]])|| {{Convert|218|hp|kW PS|0|abbr=on}} @ 6,400, {{Convert|186|lbft|Nm|0|abbr=on}} @4,800
|-
|M37||2010–||{{convert|3696|cc|cuin||abbr=on}} V6 24-valve [[VVEL]] ([[VQ37VHR]])|| {{Convert|330|hp|kW PS|0|abbr=on}}@ 7,000, {{Convert|270|lbft|Nm|0|abbr=on}} @5,200
|-
|M56||2010–||{{convert|5552|cc|cuin||abbr=on}} V8 32-valve [[VVEL]] [[gasoline direct injection|direct injection]] ([[Nissan VK engine#VK56VD|VK56VD]])|| {{Convert|420|hp|kW PS|0|abbr=on}} @ 6,000, {{Convert|417|lbft|Nm|abbr=on}} @4,400
|-
|rowspan=2|M35h||rowspan=3|2011–||{{convert|3498|cc|cuin||abbr=on}} V6 24-valve ([[Nissan VQ engine#VQ35HR|VQ35HR]])||{{convert|303|hp|kW PS|0|abbr=on}} @ 6,800, {{convert|358|Nm|lbft|0|abbr=on|order=flip}} @ 4,800
|-
|electric motor||{{convert|59|PS|kW PS|0|abbr=on}}@? {{convert|270|Nm|lbft|0|abbr=on|order=flip}} @?
|}
{|class="wikitable sortable collapsible"
|+Diesel engines
!Model!!Years!!Type/code!!Power, torque@rpm
|-
|M30d||2010–2014||{{convert|2993|cc|cuin||abbr=on}} V6 24-valve [[turbodiesel]] ([[V9X Engine|V9X]])||{{Convert|237|hp|kW PS|0|abbr=on}} @ 3,750, {{Convert|406|lbft|Nm|0|abbr=on}} @ 1,750–2,500
|}

===M35h (Hybrid version) (2011–2019)===
The Infiniti M Hybrid, sold as the [[Nissan Fuga#Second generation (Y51, 2009–present)|Nissan Fuga Hybrid]] in Japan where it was the top performance trim, introduced Nissan's first in-house developed electric hybrid technology, and the carmaker claimed it doubles the [[fuel economy in automobiles|fuel economy]] of its gasoline-powered version.<ref name=NissanHybrid>{{cite news |url=https://www.reuters.com/article/idUSTOE66407E20100706 |title=Nissan's 1st hybrid aims to almost double mileage |work=Reuters |first=Chang-Ran| last = Kim |date=2010-07-06 |access-date=2010-07-09}}</ref> Nissan also announced that the Nissan Infiniti/Fuga Hybrid, together with the [[Nissan Leaf]], included its new [[Vehicle Sound for Pedestrians]] system to alert pedestrians, the blind and others to their presence when the hybrid is operating at low speeds in [[all-electric mode]].<ref name=NissanNoise>{{cite web |url=http://www.nissan-global.com/EN/NEWS/2010/_STORY/100611-01-e.html |title=Nissan demonstrates the affordable, 100% electric, zero-emission Nissan LEAF |publisher=[[Nissan]] |date=2010-06-11 |access-date=2010-07-09 |url-status=dead |archive-url=https://web.archive.org/web/20100614103425/http://www.nissan-global.com/EN/NEWS/2010/_STORY/100611-01-e.html |archive-date=2010-06-14 }}</ref><ref name=AutoBlogNoise>{{cite web |url=http://www.autoblog.com/2010/06/14/nissan-leaf-will-break-the-ev-silence-with-a-digital-whistle-w/#continued |title=Nissan Leaf will break the EV silence with a digital whistle [w/video] |publisher=[[Autoblog.com|Autoblog]] |date=2010-06-14 |access-date=2010-07-09}}''The article has a video with the Leaf warning sounds.''</ref>

[[File:NISSAN FUGA HYBRID powertrain.jpg|250px|thumb|left|Nissan Fuga & Infiniti M Hybrid Powertrain]]

The hybrid includes one electric motor and two clutches to allow the 3.5L V6 ({{convert|302|hp|0|abbr=on}} and {{convert|258|lbft|Nm|0|abbr=on}}) gas engine and electric motor to drive the rear wheels simultaneously. The [[lithium-ion battery]] pack comes from the [[Infiniti Essence]].<ref>{{cite web |last=Lavrinc |first=Damon |url=http://www.autoblog.com/2009/03/23/report-infiniti-m-hybrid-coming-in-2010/ |title=REPORT: Infiniti M hybrid coming in 2010 |publisher=Autoblog.com |date=2009-03-23 |access-date=2010-10-11}}</ref> The VQ35HR 3.5 L V6 Hybrid utilizes the [[Atkinson cycle]]. The electric motor, installed in parallel between the engine and the transmission, produces {{convert|68|PS|kW bhp|0|abbr=on}} from 1.3kWh lithium-ion batteries that are expected to have a service life of 10 years. The batteries are installed upright behind the rear seats. The main sacrifices are that the luggage compartment space is reduced, the hybrid's rear seats are fixed in place and cannot fold down, and [[ATTESA|all-wheel drive]] is not available.<ref name=NissanHybrid/> One benefit of the battery placement though, is that it leaves the hybrid with a 51/49 front to rear weight distribution.

The combined power output of the M35H's hybrid power-train is {{Convert|360|hp|kW PS|0|abbr=on}} at 6500 rpm, and an estimated {{Convert|391|lbft|Nm|0|abbr=on}} of torque at 2000 rpm.<ref>{{Cite web|url=http://www.automobile-catalog.com/bigcurve/2012/2168765/infiniti_m35h_hybrid.html|title=Horsepower and Torque curve for 2012 Infiniti M35h Hybrid offered since mid-year 2011 for North America}}</ref>

Reviewers have considered the 2012 Infiniti M35h, along with the 2011 [[Porsche Panamera]] S Hybrid which also debuted in the same calendar year, as among the best executed hybrid performance luxury cars. The M35h and Panamera S Hybrid are the first hybrid gasoline-electric vehicles with an automatic transmission to return frugal fuel economy figures ''and'' retain the acceleration/handling characteristics of its gasoline-only counterparts. Earlier hybrids such as the Lexus 2007 GS 450h used a CVT for fuel economy at the cost of driving dynamics, while the 2010 BMW ActiveHybrid 7 which has an automatic transmission did not feature significantly improved mileage over its gasoline counterpart.<ref>{{cite web |last=Magrath |first=Mike |url=http://blogs.insideline.com/roadtests/2011/08/il-track-tested-2011-infiniti-m56-vs-2012-infiniti-m35h.html |title=IL Track Tested: 2011 Infiniti M56 vs. 2012 Infiniti M35h |work=Insideline Long-Term Road Tests |publisher=Blogs.insideline.com |date=2011-08-06 |access-date=2011-10-11}}</ref><ref>{{cite web |url=http://www.caranddriver.com/reviews/car/10q3/2012_infiniti_m35h_m_hybrid-prototype_drive |title=Infiniti M Review: 2012 Infiniti M35h Hybrid First Drive – Car and Driver |publisher=Caranddriver.com |access-date=2011-10-11 |url-status=dead |archive-url=https://web.archive.org/web/20110925081330/http://www.caranddriver.com/reviews/car/10q3/2012_infiniti_m35h_m_hybrid-prototype_drive |archive-date=2011-09-25 }}</ref> The M35h's fuel economy is superior to the M37, and it is almost as fast as the M56 while providing a more balanced, near 50/50, front/rear weight distribution.<ref>{{cite web |url=https://nationalpost.com/cars/Preview+2012+Infiniti+M35h/4883226/story.html |title=Preview: 2012 Infiniti M35h |work=National Post |date=2011-06-02 |access-date=2011-10-11 }}{{dead link|date=October 2025|bot=medic}}{{cbignore|bot=medic}}</ref>

On August 23, 2011, the Infiniti M35h set an official [[Guinness Book of World Records|Guinness world record]] for the world's fastest accelerating production full hybrid. The feat took place at the United Kingdom's [[Santa Pod Raceway]], where [[CAR magazine]] journalist Tim Pollard drove the vehicle down the quarter-mile [[dragstrip]] in 13.896 seconds. The M35h averaged 13.9031 seconds for all runs, reaching speeds over {{convert|100|mph|km/h|abbr=on}}. Guinness adjudicators were present to witness the run and certify the record.<ref name="torquenews">{{cite web |url=http://www.torquenews.com/1067/2012-infiniti-m35h-sets-2013-guinness-book-world-fastest-infiniti-hybrid |title=2012 Infiniti M35h sets Guinness Book Record for world's fastest hybrid |publisher=torquenews.com |date=2011-09-21 |access-date=2011-10-11}}</ref><ref>{{cite web |url=http://www.kbb.com/car-news/all-the-latest/infiniti-m35h-sets-guinness-acceleration-mark-for-hybrid-cars/ |title=Infiniti M35h sets Guinness acceleration mark for hybrid cars |publisher=kbb.com |access-date=2011-10-11 |date=2011-09-22}}</ref> The official claimed 0–{{convert|100|km/h|mph|0|abbr=on}} time for the Infiniti M35h is 5.5 seconds.

===M30d (Diesel version) (2010–2014)===
In 2010, at the [[Geneva Motor Show#2010|Geneva Motor Show]], the [[Infiniti]] M was introduced with a diesel engine for the first time. It was sold across Europe starting in September 2010. The [[V9X Engine|V9X]] diesel engine produces {{Convert|240|hp|kW|0|abbr=on}} and {{Convert|406|lbft|Nm|0|abbr=on}} of torque at 2,500 rpm. In western Europe, this V6 performance diesel was offered as a high performance option in lieu of the M56 V8. The M30d was not sold in the US or Canada.<ref>{{cite press release|url=http://www.nissannews.com/newsrelease.do?id=836&mid=1|title=2011 Infiniti M Makes Virtual Debut at Concours d'Elegance|publisher=Nissan|archive-url=https://archive.today/20090818145836/http://www.nissannews.com/newsrelease.do;jsessionid=F5E31EE924B0A30B5DDD82332E9357D2?mid=1&id=836|archive-date=August 18, 2009|access-date=September 23, 2009|url-status=dead}}</ref>

==Discontinuation==
In 2019, Nissan confirmed that the Infiniti Q70, Q70L, Q30, and QX30 models would be discontinued after model year 2019 due to poor sales and a buyer shift in the [[United States]], [[Canada]], and [[Mexico]] to [[crossover (automobile)|crossover]]s and [[SUV]]s instead of [[sedan (automobile)|sedan]]s, [[hatchback]]s, [[Station wagon|wagons]], [[convertible]]s, and [[coupe]]s. Another reason for the discontinuation was Nissan's plans to withdraw the Infiniti brand from the [[Australia]]n, [[New Zealand]], [[South Korea]]n, [[Hong Kong]], [[Macau]], [[Vietnam]]ese, [[Indonesia]]n, [[Malaysia]]n, [[Singapore]]an, and [[West Europe]]an markets by the end of 2020, with Nissan already withdrawing the Infiniti brand from the [[South Africa]]n market in 2017 due to losses and poor sales. Nissan has no plans of abandoning sedans entirely and plans on possibly introducing an Infiniti EV vehicle in 2021 for the 2022 model year based from QS Inspiration concept.<ref>{{Cite web|url=https://www.autoblog.com/2019/10/25/infiniti-q70-cancelled-for-2020/|title = Infiniti Q70 to exit after 2019 model year| date=25 October 2019 }}</ref><ref>{{Cite web|url=https://www.caranddriver.com/news/a29609588/infiniti-q70-dead-q50-lineup-2020/|title=Infiniti Pares Down Sedan Lineup for 2020, Dropping Q70 and Base Version of Q50|date=28 October 2019}}</ref>

==Awards and recognition==
* 2010 [[Ward's|Ward's Auto]] Interior of the Year<ref>{{cite web | url=http://www.infiniti.com/global/en/home#/infiniti-world/news-events/archive/2010-06-01-interior-award |title= Interior Award | work = Infiniti Global Official Site |publisher=Infiniti.com | date = 2010-06-01 | url-status=dead |archive-url=https://web.archive.org/web/20101011041735/http://www.infiniti.com/global/en/home#/infiniti-world/news-events/archive/2010-06-01-interior-award |archive-date=2010-10-11 }}</ref>
* 2011 ''[[Popular Mechanics]]'' Automotive Excellence Award- "Top 10 Cars of 2011" (Top Luxury Pick).<ref>{{cite web |url=http://www.popularmechanics.com/cars/news/industry/2011-automotive-excellence-awards |title=Best 2011 Cars – 2011 Auto Excellence Awards |publisher=Popular Mechanics |date=2010-07-30 |access-date=2011-10-11}}</ref>
* 2011 Infiniti M received [[Insurance Institute for Highway Safety]] Top Safety Pick.
* 2011 Infiniti M35h sets official Guinness record for world's fastest production hybrid (certified by the 2013 Guinness Book of Records edition)<ref name="torquenews"/>

== Sales by calendar year ==
{| class="wikitable"
|-
! Year 
! U.S. Sales<ref name="Sales Figures">{{cite web|url=http://www.goodcarbadcar.net/2014/01/infiniti-q70-sales-figures-usa-canada.html|title=Infiniti Q70 Sales Figures|publisher=Good Car Bad Car|date=27 January 2014|access-date=25 March 2018}}</ref>
! Canada Sales<ref name="Sales Figures"/>
|-
| 2002 
| 1,010
| n/a
|-
| 2003 
| 4,755
| n/a
|-
| 2004 
| 2,090
| 31
|-
| 2005 
| 24,000
| 1,111
|-
| 2006 
| 25,658
| 1,083
|-
| 2007 
| 21,884
| 550
|-
| 2008 
| 15,618
| 410
|-
| 2009 
| 8,501
| 217
|-
| 2010 
| 14,618
| 550
|-
| 2011 
| 10,818
| 408
|-
| 2012 
| 9,130
| 320
|-
| 2013 
| 5,283
| 249
|-
| 2014 
| 5,034
| 128
|-
| 2015 
| 8,449
| 217
|-
| 2016 
| 5,872
| 156
|-
| 2017 
| 5,772
| 66
|-
|}

==See also==
* [[Infiniti]]

==References==
{{reflist|colwidth=30em}}

==External links==
* [http://www.infinitiusa.com/ Official Infiniti USA site]
* [https://web.archive.org/web/20060428184229/http://infiniti.ca/en/models/m35_45/overview.html Official Canadian site]

{{Infiniti vehicles}}
{{Infiniti}}
{{Commons category|Infiniti M}}

[[Category:Infiniti vehicles|M45]]
[[Category:All-wheel-drive vehicles]]
[[Category:Cars introduced in 1989]]
[[Category:Convertibles]]
[[Category:Coupés]]
[[Category:Executive cars]]
[[Category:Flagship vehicles]]
[[Category:Hybrid electric vehicles]]
[[Category:Luxury vehicles]]
[[Category:Mid-size cars]]
[[Category:Rear-wheel-drive vehicles]]
[[Category:Sports sedans]]
[[Category:Vehicles with four-wheel steering]]