2012 Mazda CX-9 Fuel system Problems
- Complaints
- 4about this part
- Share
- 2%of 221 total for the year
- Median mileage
- 33,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the fuel system of the 2012 Mazda CX-9, 2% of the 221 complaints for this model year. Where a mileage was given, the median is 33,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I am unsure of the first date of occurrence, but the following have been happening since I purchased this vehicle new with 12 miles on it. And the dealer can't find anything wrong with it. 1. The AC always comes on. Even when it's below zero outside. 2. It fails to go when pushing on the accelerator frequently, and especially in reverse, from a stopped position, until you really push hard on the accelerator causing it jump. 3. Last friday 2/21/2014 as I was on a ramp moving from one interstate to another, the engine continued to rev up even after I let off the gas, and pushed the brake. …”
NHTSA complaint #10566281, filed 2014-02, 4,000 miles“Multiple trips to the dealership and an independent mechanic and the check engine light (cel) comes on with a diagnosis of evaporating system / loose gas cap. Multiple diagnostics fees, a gas tank pressure test and 3 gas caps later and the problem has not been fixed. I noticed a few online forums with several others complaining of the same issue across a wide rage of years and Mazda models. There is a design problem with mazada evaporating, fuel and emissions systems. The dealer cannot identify the problem. Beyond replacing the gas cap and collecting a diagnostic fee.”
NHTSA complaint #11032254, filed 2017-10, 40,000 miles“The contact owns a 2012 Mazda CX-9. While driving 20 MPH, there was a loud metal to metal noise coming from the rear of the vehicle. In addition, the gears failed to shift correctly and the oil and engine indicators illuminated. The dealer diagnosed that the brakes needed to be changed. The brakes were replaced, but the failure recurred and worsened. The contact also smelled fuel coming from the vehicle and the vehicle had trouble accelerating. The manufacturer was notified. The failure mileage was 33,000.”
NHTSA complaint #10899636, filed 2016-08, 33,000 milesRelated service bulletins
- 10202695Oct 13, 2021Ethanol is becoming a common additive in gasoline. Gasoline containing ethanol is likely available at your local gasoline station. Typical blends of ethanol include E10 and E85…
- 10154879Mar 20, 2019In support of the new MRT distribution, Mazda will ship to dealers a new Dual Purpose Diagnostic Leak Detector beginning March, 2019. Training videos will be posted to MGSS…
- 10213377Dec 14, 2015Noise from fuel tank insulator Some vehicles may exhibit an unusual noise while driving the vehicles The noise may be caused by a broken fuel tank (B) insulator (A) that is…
- 10105649Dec 14, 2015Some vehicles may exhibit an unusual noise while driving the vehicle. The noise may be caused by a broken fuel tank (b) insulator (a) that is hanging down and contacting the…
- 10076634Dec 14, 2015Summary to be provided on a future date.
Fuel system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2020 | 3 | 16% |
| 2019 | 2 | 4% |
| 2018 | 7 | 5% |
| 2017 | 6 | 10% |
| 2016 | 8 | 7% |
| 2015 | 1 | 3% |
| 2014 | 5 | 9% |
| 2012 | 4 | 2% |
| 2011 | 1 | 1% |
| 2010 | 2 | 1% |
| 2008 | 2 | 1% |
| 2007 | 5 | 6% |
Other parts of the 2012 Mazda CX-9
143 complaintsEngine
25 complaintsAir bags
23 complaintsTransmission and drivetrain
18 complaintsVehicle speed control
11 complaintsSuspension
9 complaintsSteering
7 complaintsOther or unknown
6 complaintsElectrical system
5 complaintsExterior lighting
3 complaintsElectronic stability control
2 complaintsSeat belts
2 complaints
← All problems reported for the 2012 Mazda CX-9
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology