2015 Infiniti QX70 — Full Specifications
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Running gear matters most — before anything else, UK: check tyre prices at TirendoUS: check wheel & tyre prices at WheelHero for this car's fitment.
The 2015 Infiniti QX70 is an SUV powered by a 3.7L 6-cyl premium gasoline engine. Its most fuel-efficient configuration returns around 23 mpg (UK) / 19 mpg (US EPA) combined, with 22–23 mpg (UK) across all configurations. Owners often keep a Infiniti QX70 workshop manual to hand for servicing and repairs.
Compared with the 2014 Infiniti QX70: Fuel economy is essentially unchanged at around 23 mpg (UK) combined. No longer listed: 5L 8-cyl.
Full Specifications
| Engine | 3.7L 6-cyl |
|---|---|
| Transmission | Automatic (S7) |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | Rear-Wheel Drive |
| Body Style | SUV |
| Length | 4865 mm |
| Fuel Economy (UK) | 23 combined / 20 urban / 29 extra-urban mpg |
| Fuel Economy (US EPA) | 19 combined / 17 city / 24 highway mpg |
| CO₂ Emissions | 284 g/km |
| EPA Greenhouse Gas Score | 4 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $4,350 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2015 Infiniti QX70, all with the 3.7L 6-cyl engine. Combined fuel economy ranges from 18 to 19 mpg (US), or 22 to 23 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 3.7L 6-cyl | Automatic (S7) | All-Wheel Drive | 22 | 18 (16/22) | 302 | $4,550 |
| 3.7L 6-cyl | Automatic (S7) | Rear-Wheel Drive | 23 | 19 (17/24) | 284 | $4,350 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
Owner Essentials for the 2015 Infiniti QX70
Running Costs: 2015 Infiniti QX70
Covering around 8,000 miles a year in a 2015 Infiniti QX70 at 23 mpg combined, expect roughly 1,581 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $4,350 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Planning a road trip? Grab a road trip packing list. Only need this car occasionally? See our buy vs rent comparison.
2015 Infiniti QX70 Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
Recalls & Owner Complaints (NHTSA)
NHTSA lists 1 safety recall campaign that include the 2015 Infiniti QX70 (as of 6 October 2026). Most affected areas: Fuel system (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Fuel system — campaign 14V683000, reported 28 November 2014. Risk: A fuel leak in the presence of an ignition source could cause a vehicle fire.
Owners have filed 9 complaints with NHTSA about the 2015 Infiniti QX70. The most-reported areas are Service brakes (3), Power train (1), Electrical system (1). Complaints include 1 reported fire.
Used-buyer checklist for the 2015 Infiniti QX70
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Fuel system (1 recall campaign) — Ask whether any fuel-pump or fuel-system recalls were completed, and watch for hard starting or stalling.
- Brakes (3 owner complaints) — Brake firmly from speed and look for pulling, vibration or a soft pedal; ask for brake service history.
- Transmission & drivetrain (1 owner complaint) — On the test drive, watch for hesitation, jerking or slipping between gears and ask for transmission service history.
- Electrical system (1 owner complaint) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
How does the Infiniti QX70 compare to similar SUVs? For context, SUVs in our database average around 27 mpg (UK) combined — this model's 23 mpg figure is 4 mpg below that average. Its 284 g/km CO₂ figure is 31 g/km higher than the 253 g/km average for SUVs on this site. This comparison is based on 1824 SUVs in our dataset.
Infiniti models in our database average about 26 mpg (UK) combined on their most efficient configuration; the 2015 Infiniti QX70's 23 mpg is 3 mpg below that make average. Its 284 g/km CO₂ figure is 21 g/km higher than the 263 g/km Infiniti average.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2015 Infiniti QX70
Frequently Asked Questions
What engine does the 2015 Infiniti QX70 have?
It's fitted with a 3.7L 6-cyl premium gasoline engine, paired with a automatic (s7) transmission.
What is the fuel economy of the 2015 Infiniti QX70?
The most efficient configuration returns around 23 mpg (UK) combined, or 19 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 22 to 23 mpg.
How much does the 2015 Infiniti QX70 cost to fuel per year?
The US EPA estimates about $4,350 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2015 Infiniti QX70 have any recalls?
NHTSA lists 1 safety recall campaign that include the 2015 Infiniti QX70 (as of 6 October 2026). Most affected areas: Fuel system (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
What are the most common problems reported for the 2015 Infiniti QX70?
Among the 9 owner complaints filed with NHTSA, the most-reported areas are Service brakes (3 complaints), Power train (1 complaint), Electrical system (1 complaint). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
Is the Infiniti QX70's fuel economy good for an SUV?
It returns around 23 mpg (UK) combined, against a same-body-style average of roughly 27 mpg among the SUVs we track.