Photo: Wikimedia Commons (CC)
Every generation
Power
Combined, EPA 2019
What owners say
Our take, from owner reports
Mixed to positive sentiment, heavily dependent on engine choice and model year.
8 problems reported (3 very frequent, 2 recurrent, 3 isolated) · high confidence
Problems owners report
- Very frequentOutdated and problematic infotainment system
Described as overly complicated, slow, and a generation behind; Bluetooth connectivity issues with multiple phones.
- Very frequentUnresponsive 7-speed automatic transmission
Significant lag and delay in kick-down, especially in default and Eco modes; harsh, noticeable shifts; described as having a "dead spot" and being sluggish.
- Very frequentPoor fuel economy
Consistently reported as a downside for both the 3.7L V6 and 5.6L V8 engines.
+ 5 more issuesShow fewer
- RecurrentCatalytic converter failure (5.6L V8)
Can clog around 100,000 miles; requires engine removal for replacement, leading to very high repair costs (~$3,000+ for labor alone).
- RecurrentTransmission valve body/TCM failure
Can cause limp mode (P0720/P0717 codes), harsh shifting, and requires expensive replacement; electrical issues in the harness can mimic this failure.
- IsolatedBrake system issues
Intermittent hard brake pedal, particularly in cold weather; potential vacuum or booster issue.
- IsolatedEngine misfires and bottom-end wear (3.7L V6)
Isolated reports of misfires leading to diagnosed engine wear or failure around 128,000 miles; potential crankshaft/pulley noise issues.
- IsolatedCooling system leaks
Reports of cracked hoses leading to overheating, though not model-specific.
The version owners recommend
2014 and newer Q70 with the 5.6L V8. This recommendation is based on mechanical quality-of-life updates that addressed known issues from the preceding M56 generation, such as the timing chain and rear-wheel steering. The V8 is celebrated for its power and character. For those prioritizing proven reliability, the 3.7L V6 models from 2014 onward are also highly recommended, as most issues with the VQ engine were eliminated by 2015. The long-wheelbase (L) model is noted for offering more rear legroom.
Competitors to consider
Owners compare it most often with the Lexus GS, Lexus ES, BMW 5 Series, Audi A6 and Mercedes-Benz E-Class.
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Overall sentiment
Mixed to positive sentiment, heavily dependent on engine choice and model year. The naturally aspirated 3.7L V6 (VQ37VHR) and 5.6L V8 (VK56VD) engines are widely praised for their strong power, reliability, and longevity, with the 3.7L noted as being "rock solid" and the V8 described as "fun as shit to drive." The vehicle is appreciated for its handsome looks, comfortable and capable handling on both back roads and interstates, and spacious interior, particularly in the long-wheelbase (L) models. Significant and consistent criticism is directed at the outdated, overly complicated, and slow infotainment system and gauge cluster, which is described as feeling a generation behind competitors. The 7-speed automatic transmission is frequently criticized for sluggish, laggy, and unresponsive behavior, especially in default and Eco modes, with noticeable delays in kick-down and harsh shifts. Fuel economy is consistently reported as poor for both engine options. Sentiment is positive for well-maintained, later-model examples purchased at a significant value discount, but negative regarding the vehicle's aging technology and specific costly repair items.
Positioning vs competitors
Positioned as a high-value, performance-oriented full-size luxury sedan with superior reliability (for NA engines) but inferior technology and refinement compared to German rivals. It is frequently compared to the BMW 5 Series and Audi A6 in size and performance, though owner feedback indicates it can feel less refined, with worse transmission tuning and more dated interiors. It is considered a bargain on the used market, offering V8 power and luxury features at a significantly lower cost than contemporary German V8 sedans. Within the Infiniti lineup, it is viewed as nicer and more luxurious than the Q50 and G37 but shares their reliable powertrains.
Recommended configurations
AWD (for improved traction, though RWD V8 models are also common). Meticulous review of service records is mandatory, with specific emphasis on transmission and differential fluid changes every 30,000 miles. A pre-purchase inspection is strongly advised. For V8 models, confirming the timing chain service (a known issue pre-2014) is critical. Avoid pre-2014 M56/V8 models due to timing chain and rear-wheel steering failure risks. Opt for later production years (2017-2020) for the most refined examples of a mature platform.
General recommendations
Suitable for buyers seeking a powerful, reliable, and spacious luxury sedan at a steep discount on the used market. Ideal for owners who prioritize driving dynamics, engine performance, and proven mechanical longevity over cutting-edge infotainment and cabin technology. NOT recommended for buyers who value modern tech interfaces, responsive transmission behavior, or good fuel economy. Essential to verify complete service history, specifically for transmission, differential, and (on V8s) timing chain maintenance. Budget for higher repair costs when issues arise due to low production volume and imported parts. Purchase price should reflect the vehicle's age and technology deficit compared to peers.
Remarks
The model underwent a name change from Infiniti M to Q70 for the 2014 model year, with corresponding mechanical updates. The 5.6L V8 was discontinued after the 2019 model year, and the 3.7L V6 was discontinued after 2020, making the Q70 a rare sight. A hybrid variant was mentioned as being "quietly axed" due to poor sales. The platform is a stretched version of the FM platform shared with the G37, 370Z, and Q50, allowing for some parts interchangeability. Dealer inventory and community discussion volume for this model are low, reflecting its niche status and discontinuation. Analysis based on approximately 24 substantive owner discussions and mentions.
Generation by generation
Owner insights per generation and US complaint/recall records (NHTSA).
Complaints and recalls by model yearWorst year: 2015. Years to avoid: 2015Source: NHTSA (US)Show table
Each year graded against the model's other years: Year Score. See all Infiniti Q70 years to avoid
| Year | Complaints | Recalls | Most-reported area |
|---|---|---|---|
| 2018 | 4 | 1 | air bags |
| 2017 | 2 | 1 | unknown or other |
| 2016 | 6 | 1 | visibility/wiper |
| 2015 | 32 | 2 | power train |
| 2014 | 2 | 5 | air bags |
Complaint counts come from owner reports filed with the US National Highway Traffic Safety Administration. Higher-selling years naturally accumulate more complaints.
Recall notices10 on record · Source: NHTSA (US)Show recalls
2018 · power train:driveline:driveshaftcampaign 24V470000
Nissan North America, Inc. (INFINITI) is recalling certain 2011-2013 M56, 2012-2013 M35 Hybrid, 2014-2018 Q50, Q70 Hybrid, 2014-2019 Q70, and 2015-2019 Q70L two-wheel drive vehicles. The driveshaft can fatigue and break.
2017 · power train:driveline:driveshaftcampaign 24V470000
Nissan North America, Inc. (INFINITI) is recalling certain 2011-2013 M56, 2012-2013 M35 Hybrid, 2014-2018 Q50, Q70 Hybrid, 2014-2019 Q70, and 2015-2019 Q70L two-wheel drive vehicles. The driveshaft can fatigue and break.
2016 · power train:driveline:driveshaftcampaign 24V470000
Nissan North America, Inc. (INFINITI) is recalling certain 2011-2013 M56, 2012-2013 M35 Hybrid, 2014-2018 Q50, Q70 Hybrid, 2014-2019 Q70, and 2015-2019 Q70L two-wheel drive vehicles. The driveshaft can fatigue and break.
2015 · power train:driveline:driveshaftcampaign 24V470000
Nissan North America, Inc. (INFINITI) is recalling certain 2011-2013 M56, 2012-2013 M35 Hybrid, 2014-2018 Q50, Q70 Hybrid, 2014-2019 Q70, and 2015-2019 Q70L two-wheel drive vehicles. The driveshaft can fatigue and break.
2015 · engine and engine cooling:enginecampaign 14V583000
Nissan North America, Inc. (Nissan) is recalling certain model year 2013-2014 Infiniti M35 hybrid vehicles manufactured April 7, 2012, to September 9, 2013, 2014 Infiniti Q50 hybrid vehicles manufactured December 10, 2012, to July 15, 2014, and 2014-2015 Infiniti Q70 hybrid vehicles manufactured April 9, 2010, to May 7, 2014. Due to a software error, In the affected vehicles, if the signal is lost from one of the two throttle position sensors (TPS), the engine control module (ECM) will go into a fail-safe mode, partially closing the throttle chamber. Should the lost signal be restored, the throttle chamber may open, regardless of the position signal from the TPS.
2014 · power train:driveline:driveshaftcampaign 20V755000
Nissan North America, Inc. (Nissan) is recalling certain 2011-2013 Infiniti M56, 2012-2013 M35 Hybrid, and 2014 Q70 and Q70 Hybrid vehicles. These models, equipped with 2WD and with a hybrid or VK56 powertrain, have a driveshaft that may break.
2014 · power train:driveline:driveshaftcampaign 24V470000
Nissan North America, Inc. (INFINITI) is recalling certain 2011-2013 M56, 2012-2013 M35 Hybrid, 2014-2018 Q50, Q70 Hybrid, 2014-2019 Q70, and 2015-2019 Q70L two-wheel drive vehicles. The driveshaft can fatigue and break.
2014 · engine and engine cooling:enginecampaign 14V583000
Nissan North America, Inc. (Nissan) is recalling certain model year 2013-2014 Infiniti M35 hybrid vehicles manufactured April 7, 2012, to September 9, 2013, 2014 Infiniti Q50 hybrid vehicles manufactured December 10, 2012, to July 15, 2014, and 2014-2015 Infiniti Q70 hybrid vehicles manufactured April 9, 2010, to May 7, 2014. Due to a software error, In the affected vehicles, if the signal is lost from one of the two throttle position sensors (TPS), the engine control module (ECM) will go into a fail-safe mode, partially closing the throttle chamber. Should the lost signal be restored, the throttle chamber may open, regardless of the position signal from the TPS.
2014 · power train:automatic transmissioncampaign 14V582000
Nissan North America, Inc. (Nissan) is recalling certain model year 2014 Infiniti Q50 hybrid vehicles manufactured October 16, 2013, to January 27, 2014, and Infiniti Q70 hybrid vehicles manufactured November 7, 2013, to December 10, 2013. The affected vehicles may have been assembled with transmissions whose housings were damaged during their manufacturing.
2014 · hybrid propulsion systemcampaign 14V581000
Nissan North America, Inc. (Nissan) is recalling certain model year 2014 Infiniti Q50 hybrid vehicles manufactured December 10, 2012, to June 25, 2014, and Infiniti Q70 hybrid vehicles manufactured November 7, 2013, to May 7, 2014. Due to a software error, the electric motor may stop working while the vehicle is being driven using the electric motor only.
Specifications
5.6 V8
5.6L 8-cylinder · 420 hp · AWD · automatic
Built 2014–2018