Problems · NHTSA complaints
2009 Infiniti G-Class problems
Owners filed 167 complaints about the 2009 Infiniti G-Class with NHTSA between Oct 2009 and Mar 2026. The most-cited component is air bags (88).
Complaints
167
Filed with NHTSA
Crashes
5
Reported by owners
Fires
0
Reported by owners
Injuries
1
People reported injured
Deaths
0
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Air bags88
- Engine21
- Power train18
- Electrical system16
- Seats13
- Vehicle speed control9
- Visibility/wiper6
- Structure5
- Service brakes, hydraulic5
- Steering4
- Suspension3
- Engine and engine cooling2
- Visibility1
- Fuel/propulsion system1
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Nov 13, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
5
13
4
6
3
7
7
12
18
19
33
14
7
7
7
2
2
1
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2009 | 5 |
| 2010 | 13 |
| 2011 | 4 |
| 2012 | 6 |
| 2013 | 3 |
| 2014 | 7 |
| 2015 | 7 |
| 2016 | 12 |
| 2017 | 18 |
| 2018 | 19 |
| 2019 | 33 |
| 2020 | 14 |
| 2021 | 7 |
| 2022 | 7 |
| 2023 | 7 |
| 2024 | 2 |
| 2025 | 2 |
| 2026 | 1 |
Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.
Top problems in owners’ words
Verbatim from NHTSA complaints, newest first
Air bags
88 reports2 crashes
“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
21 reports1 crash
“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.”
Power train
18 reports2 crashes
“MY CAR WAS SLOWING DOWN AND JERKED IN AND OUT OF FIRST GEAR IVE BEEN HAVING THIS PROBLEM FOR MOTNTHS I LOOKED ON INFINITI FORUM AND SEEN ITB12-027D AND INFINITI WILL NOT FIX MY CAR I ALMOST HIT SOMEONE CAR DUE TO THE CAR DRIVING REALLY WEIRD ! AND SWERVED AND HIT A CURB INSTEAD THIS IS RIDICULOUS IM ALSO REPORTING THIS TO THE BBB AS WELL BECAUSE PLENTY OF PEOPLE ARE REPORTING THIS AS AN ISSUE WITH THIS YEARS TRANSMISSION AND ENGINE AND THEY ARENT DOING ANYTHING TO FIX IT BUT THROW PRICES AT THEIR CUSTOMERS FOR THE TO FIX TEHE PROBLEM THEMSELVES”
Electrical system
16 reports
“Front passenger air bag occupancy sensor failure. Sensor is located on front passages seat and activates or deactivates passenger air bags based on occupancy and or weight. The vehicle has less than 90,000 miles. Passenger airbag/seat belt warning lamp on. Passenger airbag off indicator light remain on even when passenger seated. Repair cost estimated over $5,000. Vehicle will not pass inspection.”
Seats
13 reports
“I am the original owner of this 2009 G37 sedan with only 12K miles. This car has never been in an accident. It is perfectly maintained and sits in a garage 99% of the time. Last week the airbag light flashed on. The dealer said the error code was B1018 (Occupant Classification Sensor malfunction). The cost of the passenger seat cushion alone is $7,500. This problem was also found on the 2007 & 2008 G37 models and part of a NHTSA recall (#08V521000). I found this problem all over the internet and this NHTSA site for this model year G37. PLEASE INVESTIGATE THIS PROBLEM. Why isn't this part of the 2007/2008 recall when the sensor is bad in both instances?”
Vehicle speed control
9 reports1 crash
“I WAS DRIVING MY VEHICLE ON A STATE HIGHWAY WITH NO BREAKDOWN LANE, ONLY A 'SOFT SHOULDER' GOING ABOUT 70 MPH IN THE MIDDLE LANE. THERE WAS A VEHICLE IN FRONT OVER ME GOING ABOUT 65 MPH AND THE FURTHEST LEFT LANE WAS MOVING CLOSER TO MY SPEED. WHEN THERE WAS AN OPENING, I SIGNALED AND BEGAN CHANGING LANES WHEN THE VEHICLE BEGAN JERKING AND LOSING POWER. THERE WAS A CAR APPROACHING FAST IN THAT LEFT LANE AND ALSO THE VEHICLE THAT WAS BEHIND ME IN THE MIDDLE LANE BEGAN CLOSING IN. I NEARLY CAUSED A THREE CAR PILE UP TRYING GET OVER TO THE SOFT SHOULDER. THESE VEHICLES ARE EQUIPPED WITH A VQ37VHR MOTOR WHICH INFINITI EQUIPPED WITH A PAPER GASKET IN THE DEPTHS OF THE MOTOR CALLED A 'GALLEY GASKET'. ITS CHEAP FRAGILE DESIGN CAUSES LOSS OF POWER AND FOR THE VEHICLE TO NOT EXCEED 2500 RPMS WHICH IS VERY UNSAFE FOR HIGHWAY DRIVING AS MANY TIMES IT IS NECESSARY TO SAFELY NAVIGATE OR EVEN EXIT THE ROADWAY. THE PAPER GASKET CAUSES INEVITABLE DEMISE TO THE MOTOR ALLOWING OIL TO ENTER WHERE IT SHOULD NOT. THIS IS ALL BEFORE THE CHECK ENGINE LIGHT EVEN ILLUMINATES. ONCE THE LIGHT COMES ON, IT WILL DISPLAY A CODE 'P0011' AND/OR 'P0021' WHICH CALLS FOR THE VARIABLE VALVE…”
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 13, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.