2009 Infiniti G37 Engine Problems

Mileage when the problem started

• Under 25k
  525%
• 25k–50k
  210%
• 50k–75k
  420%
• 75k–100k
  00%
• 100k–150k
  630%
• 150k+
  315%

Owner reports

Selected complaints filed with NHTSA by 2009 Infiniti G37 owners, lightly cleaned up (personal details are redacted by NHTSA).

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. …

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. …

Nissan and Infiniti oil gallery gasket problem* it's ridiculous how Nissan and Infiniti have not come forward with a statement about this notorious problem. It's an utter shame how a company does not recognize their failures in their cars. Some Nissan and Infiniti vehicles are equipped with a paper material gallery gasket that tends to fail at any given moment it does not matter the mileage nor the age of the vehicle it's bound to happen regardless. Nissan/Infiniti silently changed the gallery gasket in some pre-2012 production cars to a more reinforced gallery gasket made out of metal part # of gasket: 13533-jk21b - small lower gasket, 13533-jk21a - large upper gasket. Vehicles affected 350z 370z g35 G37 fx35 fx45. Moreover, this problem is inevitable!! Cars equipped with the faulty part can put many at risk of an accident of any sort. …

Rear galley gasket failure, vehicle is out of warranty, but only has 56K miles on the engine. Is daily driven and not used for any driving outside of the day to day routine. Contacted the dealership and while they see these gasket failures often they were unable to do any type of work on the vehicle due to it being outside of the warranty. The fix will be to replace the gasket which will be a 4,000$ repair, on a car that is only 9 years old and has low miles. This failure occurred while my wife was driving and instantly threw the car into limp mode, because of the lowered oil pressure reading, which resulted in a car unable to continue highway speeds and without knowledge of what limp mode was and what was occurring this could be a very dangerous situation that appears to be a common failure in the vq37vhr engine. I was surprised this isn't already a recall issue.

I was coming out from the freeway at the traffic light the car completely shutdown, and it will not start. First I called for aaa to tow it, once he came the driver checked the battery and he told me the battery was fine, then he told me the engine is gone. And then I called the dealer to check if this is a recall, or anything and I was told the power train was expired. I have no indication of any heating, or any engine lights, everything was working fine. I do the maintenance as recommended by infinity book. The this vehicle has low mileage 2009 year made and I don't drive much. I searched online and there are so many people suffer exactly like me.

My 2009 Infiniti G37, third owner, has always had its scheduled maintenances through Infiniti. Took the car in because of a rattle sound coming from the undercarriage. Dealership diagnosed it as "internal engine damage." no indication from the vehicle that their is a problem with the engine. There has never been a check engine light detected or any other symptom - other than the "rattle" sound - that would discern an engine problem when driving the vehicle. Infiniti consumer affairs will not help me, and say that I have no recourse. Now, the car is at Infiniti of west chester, pa and I need a brand new engine! The car has less than 60,000 miles.

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

Vehicle's engine stalled (shuttered, acceleration lost, felt like choking) at highway speeds, about 50-60 MPH, creating a dangerous situation and I needed to pull over onto the shoulder immediately as the car decelerated to under 30 within seconds. The check engine light came on soon after. Searched "2009 Infiniti G37 engine sputtering" with hundreds of similar results, somehow Infiniti dealerships were never able to reproduce the defect. This car is extremely dangerous and Infiniti needs to start placing human lives over their sales.

I have 38 pages of service regarding a starting problem. When the car is started with the ac on, it cranks but will not start. There have been 6 battery replacements, one 6 months after the car was purchased and 5 in the last 5 years. Within the last week and a half it has needed 4000 in repairs. A valve assembly, control and now an engine control module. The car was brought in dozens of times and the problem never fixed. Would be happy to provide all of the paperwork.

Engine complaints in other G37 years