Control module (ECM/PCM/BCM) failure on the 2009 Infiniti G37
Only 6 reports for this mode came with an odometer reading, which is too few for percentiles to mean anything. The page is here because someone linked to it; treat the figures as anecdotes, and see the full report for this year instead.
When control module (ecm/pcm/bcm) failure gets reported
There are 6 reports of control module (ECM/PCM/BCM) failure on the 2009 Infiniti G37, 6 with a mileage attached. That is too few to place the failure on the odometer with any confidence.
A part like this is normally expected to survive 92,000 miles. It is the 7th most-reported problem on this model year.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| — | — | 39,100 miles | — | — |
Read the 10th percentile as “one report in ten arrived this early”. Exact figures are shown in this table because it is the table of record; everywhere else on the site they are rounded to the precision the sample can carry.
What a percentile can and cannot tell you here
These five numbers describe the readings owners gave, in order. The median is the middle one: half the reports arrived below it. The 10th and 90th are the edges of the bulk of the distribution, and the distance between them is the part worth reading. A tight spread — say 70,000 to 95,000 miles — points at something that wears out on a schedule, and the schedule is knowable. A wide one, 20,000 to 190,000, points at a fault that hits some cars and never troubles others, which means the mileage on the listing in front of you tells you very little about your odds.
What these figures are not is a survival curve. Every reading here comes from a car whose owner filed a complaint, so the sample contains only failures: it cannot say what share of the fleet made it past 150,000 miles untouched, because those owners had nothing to report. Nor is the mileage the moment of failure — it is the odometer reading as recalled at the time of filing, which may be weeks later and is sometimes rounded to the nearest ten thousand by the person typing it.
Percentiles are shown at all only once 8 readings exist for the vehicle and mode. Below that the middle of a handful of numbers is noise wearing a decimal point, so the figures are withheld rather than dressed up.
What happens, and what it costs
Putting it right typically runs $700–$3,000 at an independent US shop. That range is an editorial estimate held in this site's failure-mode catalogue, not a figure from NHTSA, and it is a repair cost rather than a diagnosis cost.
The same failure, every year of the Infiniti G37
If one year stands out to the left, that is the year to avoid; if the whole line sits at a similar mileage, this is wear rather than a defect in one production run.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
What owners wrote
Verbatim from NHTSA complaint narratives, trimmed for length. The mileage is the one the owner gave.
Tl*the contact owns a 2009 infiniti g37. The air bag off light illuminated intermittently and remained on which meant that even if an adult was sitting in the front passenger seat the air bag would not deploy. The light illuminated more frequently while driving longer distances. The dealer was unable to duplicate the failure and stated that there was nothing to repair. He contacted the manufacturer and has not received a response. The vehicle has not been repaired. The current mileage was approximately 4,800 and the failure mileage was approximately 4,000. Updated 12/07/09 *bf the consumer also stated the vehicle had been serviced 4 times for security system malfunction and twice for air bag problems. Updated 12/07/09. *jb
Apparently on 2009 infiniti g37s, there is a programming error/deficiency in the electronic engine control module (ECM) affecting the processing of the mass flow rate sensor that will cause the engine to unexpectedly (and without a dash warning indicator) to lose power. At occurrence of the failure, the car will decelerate from highway speed to less than 35 MPH within a few seconds. Following the failure, the engine RPM will not exceed 2,400 RPM and speeds above 35 MPH are impossible (I found that 4th gear is the highest gear selectable). This failure can be dangerous in a number of traffic situations. I have learned from an infiniti service dept. That the failure will temporarily correct itself if the engine is turned off for a period of time, but that the failure could reoccur. The car's ECM was re-programmed by towbin infiniti (las vegas, nv) on august 30 and that supposedly fixes the failure. While at towbin, the service man said that infiniti knows of the problem, but is waiting to see how wide-spread the problem is. Owners have not been told of this problem. Towbin service said they have seen about 300 cases of the problem…
Apparently on 2009 infiniti g37s, there is a programming error/deficiency in the electronic engine control module (ECM) affecting the processing of the mass flow rate sensor that will cause the engine to unexpectedly (and without a dash warning indicator) to lose power. At occurrence of the failure, the car will decelerate from highway speed to less than 35 MPH within a few seconds. Following the failure, the engine RPM will not exceed 2,400 RPM and speeds above 35 MPH are impossible (I found that 4th gear is the highest gear selectable). This failure can be dangerous in a number of traffic situations. I have learned from an infiniti service dept. That the failure will temporarily correct itself if the engine is turned off for a period of time, but that the failure could reoccur. The car's ECM was re-programmed by towbin infiniti (las vegas, nv) on august 30 and that supposedly fixes the failure. While at towbin, the service man said that infiniti knows of the problem, but is waiting to see how wide-spread the problem is. Owners have not been told of this problem. Towbin service said they have seen about 300 cases of the problem…
Also reported on the 2009 Infiniti G37
Airbag warning light or occupant sensor fault
Other engine problem
Other body or interior problem
Other speed control problem
Other powertrain problem
No-start or intermittent start failure
How far this goes
This page is kept out of search results because 6 reports is not enough to publish percentiles from. It stays reachable because somebody looking at this exact car would rather see the reports than be told there are none.
Complaints are voluntary, so 6 is a floor and not a count of affected cars. Mileages are typed in by owners and cluster on round numbers. And the mode itself is assigned by software reading the complaint text, which is reliable in bulk and fallible one report at a time.
Questions this page answers
At what mileage does control module (ecm/pcm/bcm) failure happen on the 2009 Infiniti G37?
Across 6 owner reports that included an odometer reading, half were filed by 40,000 miles. A quarter were filed before — and a quarter after —. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is control module (ecm/pcm/bcm) failure on the 2009 Infiniti G37?
6 reports have been filed with NHTSA, about 10 per 1,000 vehicles. Complaints are voluntary, so this is a floor rather than a count of affected cars.
What this is and is not. These are the mileages at which owners chose to complain to a federal agency, which is not the same as the mileage at which the part fails on every car. It skews toward failures that happened outside warranty, cost real money, or frightened someone. It is still the only public dataset that carries failure mileage at all, and the shape of a few hundred readings is informative even when a single one is not. Methodology · JSON · this failure on other cars
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed