Most common 2009 Infiniti G37 problems
Share of the 167 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Infiniti G37 complaints by model year
Best G37 years: 2008. Years to avoid: 2009. Compare all years →
What 2009 Infiniti G37 owners say
Air bags all 88 →
The contact owns a 2009 Infiniti G37. The contact stated that the passenger's side air bag warning light was illuminated. The vehicle was taken to an independent mechanic who informed the contact that the seat needed to be replaced. The passenger's side seat wiring and sensor were faulty. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 53,000. The consumer stated he has taken is vehicle to the dealer and filed a complaint with Infiniti and both parties are stating there is nothing that they can do.
The contact owns a 2009 Infiniti G37. The contact stated that the air bag warning light was flashing, with the message "Passenger Air Bag Off 2" displayed on the instrument panel. The vehicle was taken to the dealer to be diagnosed; however, there was no electrical failure found with the POD sensors. The dealer stated that the air bag needed to be replaced. The contact researched and found information on the failure of the air bags. The manufacturer was not made aware of the failure. The failure mileage was approximately 82,000.
Engine & cooling all 23 →
I was driving at about 65 mph on the tail end of a roughly 2 hour trip. The car shut off on me completely. Fortunately there weren't many cars on the road, so I was able to force the steering wheel - since power steering went out as well, I needed to turn the wheel forcefully - to the shoulder. The brakes worked ok, but not well, again because the engine shut off, so I was forcing the brakes and they took a lot longer to work than normally. Had there been normal to heavy traffic, I'd definitely have been in a very bad crash. The vehicle is available for inspection if needed. This is the second time this situation has occurred to me in this vehicle. There was no warning lamp, message, or symptom prior to or after the incident. A dealer, manufacturer, police, insurance, nor anyone else has inspected or reproduced the problem. Various Infiniti online forums reference the same issue.
After purchasing the vehicle used, I been experiencing issues with the vehicle. The service engine soon indicator has illuminated on the dashboard after two weeks of the purchase. I took the vehicle to valvoline for the oil change service, and the light was still illuminated. Notified my personal mechanic of the issue as well as the dealer. Took the vehicle to autozone and used their free diagnostic reader, which stated the o2 sensor for bank 2 sensor 1 as the issue. Purchased the part from the dealer, took it to the mechanic for service. After I paid for the service, the same day the service engine soon light illuminated again. The next day I took it back to autozone and the diagnostic read bank 1 sensor 1. Took it to multiple mechanics to only have the run around of paying them to look at but not fix the issue. …
Transmission & drivetrain
I was driving at about 65 mph on the tail end of a roughly 2 hour trip. The car shut off on me completely. Fortunately there weren't many cars on the road, so I was able to force the steering wheel - since power steering went out as well, I needed to turn the wheel forcefully - to the shoulder. The brakes worked ok, but not well, again because the engine shut off, so I was forcing the brakes and they took a lot longer to work than normally. Had there been normal to heavy traffic, I'd definitely have been in a very bad crash. The vehicle is available for inspection if needed. This is the second time this situation has occurred to me in this vehicle. There was no warning lamp, message, or symptom prior to or after the incident. A dealer, manufacturer, police, insurance, nor anyone else has inspected or reproduced the problem. Various Infiniti online forums reference the same issue.
Between 40-50 MPH, on a busy rural highway, the car would occasionally (once in 3 months) go into limp mode. This problem is now occurring weekly! You cannot accelerate more 2,000 rpms when this happens. You can manually shift the transmission to a higher gear to get to a safe spot to pull over. However, it feels like the transmission might fall out of the car when shifting. Most of the time, when you cut the car off and restart it, it runs as normal. It's like the computer resets. As of late, I have to cut the car off and restart twice. This is beginning to happen more frequently, like once or twice a week. We have consulted with a dealer, and have tried several recommendations. We have new air filters and mas air sensors. This did not correct the problem. After further investigation, we found a dealership who admitted that they have seen or heard of this problem. …
2009 Infiniti G37 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.7L 6-cyl | 7-speed automatic | RWD | 18 / 26 / 21 |
| 3.7L 6-cyl | 6-speed manual | RWD | 17 / 25 / 20 |
| 3.7L 6-cyl | 7-speed automatic | 4WD/AWD | 18 / 25 / 20 |
EPA ratings. Class: Subcompact car.
Frequently asked questions
Is the 2009 Infiniti G37 a good car?
Based on 167 owner complaints filed with NHTSA, the 2009 G37 rates use caution: 1.8× as many complaints as a typical year of the G37 at the same age. It is one of the G37 years we suggest avoiding. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2009 Infiniti G37?
The air bags — 88 complaints, 53% of all complaints for this model year, most often about frontal › sensor/control module. Next are the engine & cooling (23) and transmission & drivetrain (18).
How many recalls does the 2009 Infiniti G37 have?
NHTSA lists no recalls for the 2009 Infiniti G37. You can still confirm with your VIN using our VIN recall check.
What are the best and worst years of the Infiniti G37?
The best years by complaints, compared at the same age, are 2008. Years to avoid or approach with caution: 2009. See the full Infiniti G37 years comparison.
At what mileage do 2009 Infiniti G37 problems happen?
The median mileage reported in complaints is about 70,000 miles; 32% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.