AI Damage2015 Infiniti Q40: common problems
Owners of the 2015 Infiniti Q40 filed 8 complaints with NHTSA, most often about air bags and electrical system. Details by component below, with sources.
Key figures
- Owner complaints
- 8
- involving a crash
- 1
What fails most often
- 1 Air bags 38% of all complaints
- 2 Electrical system 13% of all complaints
- 3 Electronic stability control 13% of all complaints
- 4 Exterior lighting 13% of all complaints
- 5 Structure 13% of all complaints
- Air bags: 3 complaints (38% of all).
- Electrical system: 1 complaints (13% of all).
- Electronic stability control: 1 complaints (13% of all), 1 of them with a crash reported by the owner.
- Exterior lighting: 1 complaints (13% of all).
- Structure: 1 complaints (13% of all).
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 3.7 L · petrol · 6 cyl
- automatic, 7-speed
Drive: RWD, AWD
Symptoms owners describe
How many of the 8 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Air bags | 3 | 0 | 0 |
| Electrical system | 1 | 0 | 0 |
| Electronic stability control | 1 | 1 | 0 |
| Exterior lighting | 1 | 0 | 0 |
| Structure | 1 | 0 | 0 |
| Other | 3 | 1 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
While in motion on a highway the vdc (auto hydroplane correct function) is suspected to have caused increase loss of control of vehicle. I was able to observe that the vdc light was flickering on and off.
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.
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; however, a diagnostic test was pending. The vehicle was not repaired. The manufacturer was not notified of the failure.
This is while she was sitting with the seat belt while the car was moving at any speed.
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 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.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 11,899 of 36,659 model years in the NHTSA data (top 32% most complained about).
On average one model year of the Q40 has 4 complaints (2 years in the data). This year has 8, above average.
What to check before buying
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Electronic stability control. ABS/ESC sensors, steering angle, codes after suspension repair.
- Exterior lighting. Headlamps, leveling, sensors and mounts after a frontal hit.
Other years of this model
Questions and answers
What are the most common problems with the 2015 Infiniti Q40?
Owner complaints to NHTSA most often mention: air bags, electrical system, electronic stability control. Total complaints: 8. The most frequent symptoms in complaint texts: A/C or heater (13%), rollaway, parking brake (13%), seat belts (13%).
How many service bulletins (TSB) were issued for the 2015 Infiniti Q40?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2015 Infiniti Q40 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2015 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-06.