Owners have filed 8 complaints on the Infiniti Q40, covering 2015–2015. The system named most often is Air Bags (3 reports). Worst years by volume: 2015; cleanest: 2015. 1 reports describe a crash. On average the car was 4.7 years old when the problem happened.
What breaks on Infiniti Q40
Grouped by the system owners named — percentages are shares of all 8 Q40 complaints. Open any row for the full reports in owners' own words.
Air Bags 3 Read
Since I bought car at 96 miles and now at 3000 miles the passenger "air bag off" light is always on whenever my wife, who weighs 105 to 109 lbs, is a passenger - she does not have airbag protection. I took car to the service department of two independent dealerships 4 months apart..they both kept it overnight, tested…
The passenger airbag off light stays on while an adult weights more than 120 pound sitting on the passenger seat. The light won't go off while the car is moving
Since I bought car the passenger "air bag off" light is always on whenever my wife, who weighs 165 lbs, is a passenger - she does not have airbag protection. We normally do not have a passenger in the front seat, and never even knew if that was an option until my wife just sat in the passenger seat and pointed it out…
Structure 1 Read
The contact owns a 2015 Infiniti Q40. The contact stated while parked, a water leak coming from the driver’s side floor was discovered. The contact also noticed that there was an abnormal odor coming from inside the vehicle that became more pronounced with the A/C unit activated. The vehicle was taken to a dealer;…
Electrical System 1 Read
A common issue found in the Infiniti Q40/G37 lineage, the sunroof drain became clogged leading to an influx of moisture underneath the flooring and within the panels of the right half of the vehicle. Due to the fault, electrical components such as the BCM and ECM were exposed to moisture, leading to numerous issues
Q40 years to avoid — and the clean ones
Complaints per model year. More reports usually means more cars on the road as well as more trouble, so read the crash and fire columns alongside the count.
| Model year | Complaints | Top system | Crashes | Fires |
|---|---|---|---|---|
| 2015 | Air Bags | 1 | — |
The same model year, different builds
Every complaint carries the first 11 characters of the VIN — plant, year, body and engine. That is a production series, and complaints are spread across them very unevenly.
| Measure | Value |
|---|---|
| Distinct production series | 7 |
| Average complaints per series | 1.1 |
| Worst single series | 2 complaints |
| Average age at failure | 4.7 years |
A model average of 1.1 hides a worst series at 2. Enter a VIN above to see the numbers for that exact build instead of the model as a whole.
Owners reported these. Find out if yours is one of them.
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How we count
Every figure here comes from complaints owners filed with NHTSA — 1,100,006 of them, covering 1,982 models built between 1981 and 2026.
A complaint is an unverified report: someone wrote down what happened to their car. It is not a confirmed defect and not a recall. What makes the volume useful is the pattern — when thousands of owners of the same build describe the same failure, that is a signal no marketing brochure will give you.
Two things we do that the source does not. First, we compute the age of the car at the moment of failure from the incident date and the model year. Second, we group complaints by the first 11 characters of the VIN — the production series — so a bad plant run does not disappear into a model-wide average.
Frequently asked questions
What are the worst years for the Q40?
By complaint volume, 2015 drew the most owner reports. Bear in mind that popular years put more cars on the road, so check the crash and fire columns too.
Which Q40 years are the cleanest?
2015 have the fewest complaints on file. For recent years that can simply mean the cars are young.
How many complaints does the Infiniti Q40 have?
8 owner complaints filed with NHTSA, covering 2015–2015. Of those, 1 describe a crash and 0 a fire.
Are these complaints verified?
No. They are unverified reports from owners. NHTSA publishes them as filed and investigates only a fraction. The value is in the pattern, not in any single report.
Can I check complaints for one specific car?
Yes — enter its VIN above. We match the first 11 characters, which identify the plant, year, body and engine, so you get complaints on that exact production series rather than the whole model.