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Infiniti Q50Model year report

2018 Infiniti Q50 Problems

Compared with other Infiniti Q50 years

Typical for this model

48/100 1.0× a typical year · 50 = typical

Nearby years with fewer complaints than typical and no open NHTSA investigation: 2019

Based only on NHTSA complaints, recalls and investigations. Not adjusted for how many vehicles were sold, and not a reliability rating. How this is calculated

Complaints
44filed with NHTSA
Median mileage
24,400miles, 18 complaints with mileage
Recalls
3campaigns on record
Trend
RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA crash rating
—no overall rating published
EPA fuel economy
23 mpgcombined, 3.0L 6-cyl RWD · 20 city / 29 hwy

Sources: NHTSA records for the 2018 Infiniti Q50 (complaints, recalls, investigations), NHTSA crash tests, EPA fuel economy. Report an error

NHTSA recorded 44 consumer complaints for the 2018 Infiniti Q50. The part named most often is engine, with 17 complaints (39% of the total), followed by air bags (9) and electrical system (6). 18 of the complaints include a mileage, and 72% of those were filed for vehicles with under 50,000 miles; the median is 24,400 miles. Of all complaints, 1 involved a crash, 1 a fire, according to the filers. NHTSA lists 3 recall campaigns and 159 technical service bulletins for this model year. Engine complaints overlap with 6 technical service bulletins filed under the same part. Air bags complaints overlap with 5 technical service bulletins filed under the same part. Compared with the other 5 Infiniti Q50 model years that have at least 25 complaints and are old enough to compare, this one scores 48 out of 100, where 50 is a typical year for the model (typical for this model). The comparison allows for the era and for how long each year has had to collect complaints, but not for how many vehicles were sold.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Also reported: Vehicle speed control (2), Electronic stability control (1), Exterior lighting (1), Lane departure (1), Seat belts (1), Seats (1), Steering (1), Body and structure (1).

Example complaints

Engine: “On 6/13/2020 the drive belt shredded while driving under 30mph, under light acceleration. At first, the battery light illuminated on the instrument cluster, followed the check engine light. White smoke began to come from the engine. Thankfully, I was nearby my house and made it there safely. Furthermore, the engine overheated due to a coolant hose being knocked off by the shredded belt. Additionally, the water pump and A/C compressor failed. The pulley tensioner assembly and belt were replaced under manufacturer's warranty, along with the aforementioned failed components. …”

NHTSA complaint #11351917, filed 2020-08, 8,660 miles

Air bags: “Airbag light turn on, on my dashboard, I checked it with a professional OBD2 scanner and shows a code which indicates a fault in the Occupant Detection System (ODS), which the scanner says it is very common for my vehicle. This puts my passengers at risk due to an airbag system fault. My vehicle has not been in an accident, nor has my passenger seat been messed with. I have spoken to other individuals with the same vehicle, also checked the forums for my specific vehicle and almost all of them have the same issue with the ODS, with no recalls or warranty resolution from the dealership. …”

NHTSA complaint #11691027, filed 2025-10

Electrical system: “Odometer Fraud. The contact purchased a 2018 Infiniti Q50. It was discovered that there were three separate mileage discrepancies. The vehicle was a dealer sale. At the time of purchase, the vehicle mileage was 50,370; however, at the time of registration, it was discovered that the mileage had been rolled back from 54,000 to 28,630 miles. The mileage before the vehicle was purchased was 47,650.”

NHTSA complaint #11725568, filed 2026-03, 54,000 miles

Fuel system: “Filing this complaint regarding a safety-related defect involving the turbocharger system on my 2018 INFINITI Q50. The vehicle has approximately 46,000 miles and is 8 years old. INFINITI/Nissan has acknowledged through its own Technical Service Bulletins (TSBs) that turbocharger failure on 2016–2018 Q50 3.0T vehicles is a known defect. …”

NHTSA complaint #11709489, filed 2026-01

Mileage when problems were reported

72% of the 18 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 8,700 and 54,000 miles.

28%0–1022%10–2522%25–5011%50–756%75–10011%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (18 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 24,400 miles.

Complaints by year filed

Trend: rising. Complaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.

2018201920202022202320242025102026
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Crash test ratings

NHTSA's 5-Star Safety Ratings for the 2018 Infiniti Q50. Frontal results are shown driver / passenger; rollover shows the star rating and NHTSA's estimated risk of rolling over in a single-vehicle crash.

VersionOverallFrontalSideSide poleRollover
Q50 · sedan AWDnot rated———5 · 9.7% risk
Q50 · sedan RWDnot rated———5 · 9.7% risk
Q50 Hybrid · sedan AWDnot rated———5 · 9.7% risk
Q50 Hybrid · sedan RWDnot rated———5 · 9.7% risk

Driver aids listed by NHTSA for the 2018 model year: forward collision warning optional, lane departure warning optional, automatic emergency braking not available.

Source: NHTSA New Car Assessment Program (5-Star Safety Ratings), nhtsa.gov/ratings.

Fuel economy and running cost

EPA ratings for each 2018 Infiniti Q50 version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
Q50 RWD2.0L 4-cyl7-speed automatic233025$3,300
Q50 RWD3.0L 6-cyl7-speed automatic202923$3,550
Q50 AWD2.0L 4-cyl7-speed automatic222824$3,400
Q50 AWD3.0L 6-cyl7-speed automatic192722$3,750
Q50 Red Sport RWD3.0L 6-cyl7-speed automatic202622$3,750
Q50 Red Sport AWD3.0L 6-cyl7-speed automatic192622$3,750
Q50 Hybrid RWD3.5L 6-cyl · hybrid7-speed automatic273229$2,850
Q50 Hybrid AWD3.5L 6-cyl · hybrid7-speed automatic263028$2,950

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

Recall details for the 2018 Infiniti Q50 → · Check a VIN at nhtsa.gov/recalls

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 159 on record; the latest 10 are shown.

See all 159 bulletins →

Other model years of the Infiniti Q50

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
20238—0—23—Too new
2021644,0003—23—Not enough data
2019303,0001—2328 · FewerFalling
20184424,4003—2348 · TypicalRising
20176329,0004—2352 · TypicalRising
20163933,5004—2338 · TypicalRising
201512626,614352392 · MoreRising
20141707,4905523100 · MoreStable

All Infiniti Q50 model years · Best and worst years by complaints

Frequently asked questions

How many NHTSA complaints does the 2018 Infiniti Q50 have?

NHTSA recorded 44 consumer complaints for the 2018 Infiniti Q50 as of Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2018 Infiniti Q50 is reported most often?

Engine is named most often, in 17 complaints (39% of the total), followed by air bags with 9.

Has the 2018 Infiniti Q50 been recalled?

NHTSA lists 3 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2018 Infiniti Q50 get?

The EPA rates the 2018 Infiniti Q50 (Q50, 3.0L 6-cyl) at 23 mpg combined, 20 city and 29 highway, with an estimated annual fuel cost of $3,550 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2018 Infiniti Q50 reported?

Among the 18 complaints that include a mileage, the median is 24,400 miles and the middle half falls between 8,700 and 54,000 miles; 72% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Crash ratings are from NHTSA’s New Car Assessment Program. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.