2018 Infiniti QX30 — Full Specifications
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The 2018 Infiniti QX30 is a hatchback powered by a 2L 4-cyl turbo premium gasoline engine. Its most fuel-efficient configuration returns around 32 mpg (UK) / 27 mpg (US EPA) combined, with 30–32 mpg (UK) across all configurations. Owners often keep a Infiniti QX30 workshop manual to hand for servicing and repairs.
Compared with the 2017 Infiniti QX30: Fuel economy is essentially unchanged at around 32 mpg (UK) combined. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine | 2L 4-cyl turbo |
|---|---|
| Transmission | Automatic (AM7) |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | Rear-Wheel Drive |
| Body Style | Hatchback |
| Passenger Volume (EPA) | 89 cu ft (2,520 L) |
| Luggage Volume (EPA) | 19 cu ft (538 L) |
| Fuel Economy (UK) | 32 combined / 29 urban / 40 extra-urban mpg |
| Fuel Economy (US EPA) | 27 combined / 24 city / 33 highway mpg |
| CO₂ Emissions | 201 g/km |
| EPA Greenhouse Gas Score | 6 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,050 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2018 Infiniti QX30, all with the 2L 4-cyl turbo engine. Combined fuel economy ranges from 25 to 27 mpg (US), or 30 to 32 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 |
|---|---|---|---|---|---|---|
| 2L 4-cyl turbo | Automatic (AM7) | All-Wheel Drive | 30 | 25 (21/30) | 225 | $3,300 |
| 2L 4-cyl turbo | Automatic (AM7) | Rear-Wheel Drive | 32 | 27 (24/33) | 201 | $3,050 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 89 cubic feet (about 2,520 litres) and luggage volume at 19 cubic feet (about 538 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2018 Infiniti QX30
Running Costs: 2018 Infiniti QX30
Covering around 8,000 miles a year in a 2018 Infiniti QX30 at 32 mpg combined, expect roughly 1,136 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,050 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.
Only need this car occasionally? See our buy vs rent comparison.
2018 Infiniti QX30 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 3 safety recall campaigns that include the 2018 Infiniti QX30 (as of 6 October 2026). Most affected areas: Back over prevention (1), Seat belts (1), Air bags (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Back over prevention — campaign 19V654000, reported 12 September 2019. Risk: The lack of an image in the back-up camera display increases the risk of a crash.
- Seat belts — campaign 18V355000, reported 30 May 2018. Risk: If the lower seat belt anchorage detaches in a crash, it can increase the risk of injury.
- Air bags — campaign 17V691000, reported 1 November 2017. Risk: If the driver air bag inadvertently deploys, it can increase the risk of injury and a crash.
Owners have filed 24 complaints with NHTSA about the 2018 Infiniti QX30. The most-reported areas are Electrical system (10), Unspecified (5), Steering (4).
Used-buyer checklist for the 2018 Infiniti QX30
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Air bags (1 recall campaign · 4 owner complaints) — Confirm any air bag inflator or module recalls were completed — enter the VIN at nhtsa.gov/recalls.
- Electrical system (10 owner complaints) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
- Seat belts (1 recall campaign) — Check every belt latches and retracts properly and that any restraint recalls were completed.
- Steering (4 owner complaints) — Check for play, noise or heavy steering, and ask whether any steering recall work was done.
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
Infiniti models in our database average about 26 mpg (UK) combined on their most efficient configuration; the 2018 Infiniti QX30's 32 mpg is 6 mpg above that make average. Its 201 g/km CO₂ figure is 62 g/km lower 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 2018 Infiniti QX30
Frequently Asked Questions
What engine does the 2018 Infiniti QX30 have?
It's fitted with a 2L 4-cyl turbo premium gasoline engine, paired with a automatic (am7) transmission.
What is the fuel economy of the 2018 Infiniti QX30?
The most efficient configuration returns around 32 mpg (UK) combined, or 27 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 30 to 32 mpg.
How much does the 2018 Infiniti QX30 cost to fuel per year?
The US EPA estimates about $3,050 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 2018 Infiniti QX30 have any recalls?
NHTSA lists 3 safety recall campaigns that include the 2018 Infiniti QX30 (as of 6 October 2026). Most affected areas: Back over prevention (1), Seat belts (1), Air bags (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 2018 Infiniti QX30?
Among the 24 owner complaints filed with NHTSA, the most-reported areas are Electrical system (10 complaints), Unspecified (5 complaints), Steering (4 complaints). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
How much interior and luggage space does the 2018 Infiniti QX30 have?
EPA measures interior passenger volume at 89 cubic feet (about 2,520 litres) and luggage volume at 19 cubic feet (about 538 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.