Unclassified problem on the 2011 Mazda CX-9
4 crashes 1 injury 5 of the 14 reports for this failure mention a crash, a fire, an injury or a death. Those are the owner's words on the complaint form, not a verified finding, and one report can mention more than one.
Only 8 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 unclassified problem gets reported
Owners of the 2011 Mazda CX-9 report unclassified problem at a median of 95,000 miles. A quarter of the reports come in before 30,000 miles and a quarter after 105,000 miles, from 8 reports that carried an odometer reading.
It is the 30th most-reported problem on this model year.
The mileage distribution
The reported range runs from 10,000 miles at the tenth percentile to 115,000 miles at the ninetieth, a spread of 103,124 miles across the middle 80% of reports.
When the reports scatter this far, the mileage is telling you about how these cars were driven more than about the part itself.
25% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 11,186 miles | 29,816 miles | 95,293 miles | 104,585 miles | 114,310 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
Of these reports, 4 a crash and 1 an injury are mentioned. Owners write their own complaints and the agency does not verify them, so read this as what the reports say happened rather than as a confirmed count.
The same failure on other years
The same failure is reported on 11 model years of this car. It shows up earliest on the 2015, at a median of 1,000 miles, and latest on the 2009 at 145,000 miles.
By volume the 2008 carries the most reports, with 15; the 2011 has 14. A mode that appears across most years of a model is usually a design choice rather than a bad batch.
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.
The traction control light on my cx9 comes on and stays on, even in dry conditions in which the traction control system is not needed. Also the tcs system light is illuminated and the tcs off light is illuminated. *tr
My son age 13, weighs 105 pounds. When he sits in the front passenger seat the air bag warning light is illuminated indicating that the air bag has been disabled. It is my understanding that the recommended minimum age and weight for the front seat is 12 years and 80lbs respectively. The mazda dealer, (john kennedy ford, 1403 ridge pike, conshohocken, pa 19428) ran a check of the calibration of airbag sensors." all ok, no update needed" - they gave me a copy of service bulletin no 08-001/13. This mentions that the issue is caused by my son sitting incorrectly in the passenger seat. I have spoken to the dealer on multiple occasions and this issue is still not resolved. *tr
Tl* the contact owns a 2011 mazda cx9. The contact stated that the passenger's side air bag warning light illuminated although the passenger seat was occupied. The dealer was unable to diagnose the failure. The manufacturer was not made aware of the failure. The approximate failure mileage was 36,000.
Also reported on the 2011 Mazda CX-9
Other brake problem
Master cylinder or brake booster failure
Differential or transfer case failure
Loss of braking
Water pump failure
Airbag inflator rupture
How far this goes
This page is kept out of search results because 14 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 14 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 unclassified problem happen on the 2011 Mazda CX-9?
Across 8 owner reports that included an odometer reading, half were filed by 95,000 miles. A quarter were filed before 30,000 miles and a quarter after 105,000 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is unclassified problem on the 2011 Mazda CX-9?
14 reports have been filed with NHTSA, about 0.6 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