Mazda CX-9 Transmission Problems by Year
By CarWhere Research · Updated
Some. 148 of the 1,383 owner complaints filed with NHTSA for the 2008–2023 Mazda CX-9 (10.7%) name the transmission, 0.8× the median share across the 139 models we track. Across the 2015–2022 cohorts with published sales, the Mazda CX-9 rate is 0.18 per 1,000 sold, below the 0.28 median. The worst years are 2008, 2011 and 2010.
Transmission complaints
148
Filed with NHTSA, 2008–2023 models
Per 1,000 sold
0.18
2015–2022 cohorts
Share of all complaints
10.7%
of 1,383 complaints for this model
Transmission recalls
0
NHTSA campaigns, all years
Mazda CX-9 transmission complaints by model year
Owner complaints filed with NHTSA whose component list includes Power Train (transmission, transfer case and driveline), and per 1,000 vehicles sold where a published U.S. sales figure exists. Worst years are highlighted.
| Model year | Transmission complaints | Per 1,000 sold | Share of all complaints | Crash / fire / injury | Transmission recalls | Transmission TSBs* |
|---|---|---|---|---|---|---|
| 2008WORST | 27 | — | 15.7% | 0 | — | 0 |
| 2009 | 6 | — | 10.2% | 0 | — | 0 |
| 2010WORST | 23 | — | 11.8% | 4 | — | 0 |
| 2011WORST | 25 | — | 14.7% | 1 | — | 0 |
| 2012 | 18 | — | 8.1% | 1 | — | 0 |
| 2013 | 5 | — | 7.4% | 1 | — | 17 |
| 2014 | 7 | — | 13% | 1 | — | 14 |
| 2015 | 3 | 0.17 | 8.6% | 0 | — | 13 |
| 2016 | 9 | 0.58 | 9.1% | 1 | — | 46 |
| 2017 | 4 | 0.15 | 6.6% | 0 | — | 44 |
| 2018 | 13 | 0.46 | 10.5% | 0 | — | 0 |
| 2019 | 3 | 0.11 | 5.9% | 0 | — | 37 |
| 2020 | 2 | 0.07 | 10.5% | 0 | — | 35 |
| 2021 | 2 | 0.06 | 5.9% | 1 | — | 0 |
| 2022 | 1 | 0.03 | 11.1% | 0 | — | 19 |
| 2023 | 0 | — | 0% | 0 | — | 0 |
- Per 1,000 sold = complaints ÷ published U.S. calendar-year sales × 1,000. Calendar-year sales stand in for the model-year cohort. A dash means no published figure or fewer than 5,000 sold, too small to divide by.
- Older model years have had more time on the road to collect complaints, so compare neighboring years, not 2010 against 2024.
- Crash / fire / injury = complaints where the owner reported a crash, a fire or an injury.
- *Technical service bulletins in the year's leading TSB categories that name the transmission.
Common Mazda CX-9 transmission problems owners describe
We searched the narratives of all 148 transmission complaints for symptom keywords. One complaint can mention several, so the shares don't add up to 100%.
Mazda CX-9 years to avoid for the transmission
2008 Mazda CX-9
27 transmission complaints (15.7% of the year's 172). Most often described: shudder or vibration.
2011 Mazda CX-9
25 transmission complaints (14.7% of the year's 170). Most often described: shudder or vibration.
2010 Mazda CX-9
23 transmission complaints (11.8% of the year's 195). Most often described: jerking, lurching or harsh shifts.
Worst years are those with at least 10 transmission complaints and at least 1.5 times the model's median year. For every year's overall verdict, including other systems, see the Mazda CX-9 years to avoid.
Related research
Frequently asked questions
Does the 2008 Mazda CX-9 have transmission problems?
Yes, it is one of the worst years. Owners filed 27 transmission complaints with NHTSA for the 2008 Mazda CX-9, 15.7% of all 172 complaints for that year. The most common description is "shudder or vibration" (4 complaints).
Does the 2011 Mazda CX-9 have transmission problems?
Yes, it is one of the worst years. Owners filed 25 transmission complaints with NHTSA for the 2011 Mazda CX-9, 14.7% of all 170 complaints for that year. The most common description is "shudder or vibration" (3 complaints). 1 of those complaints report a crash, fire or injury.
Does the 2010 Mazda CX-9 have transmission problems?
Yes, it is one of the worst years. Owners filed 23 transmission complaints with NHTSA for the 2010 Mazda CX-9, 11.8% of all 195 complaints for that year. The most common description is "jerking, lurching or harsh shifts" (5 complaints). 4 of those complaints report a crash, fire or injury.
Which Mazda CX-9 years have the most transmission complaints?
2008 (27), 2011 (25) and 2010 (23), by owner complaints filed with NHTSA that name the transmission. Raw counts favor older and higher-selling years, so compare the per-1,000-sold column too.
What are the most common Mazda CX-9 transmission problems?
In the 148 transmission complaints, owners most often describe jerking, lurching or harsh shifts (11.5%), shudder or vibration (10.1%) and whining, grinding or humming noise (6.8%). One complaint can mention several symptoms.
Is this a transmission failure rate?
No. These are complaints owners chose to file with NHTSA. Many failures are never reported, and one complaint is not a confirmed defect. Dividing by sales shows how often owners complain relative to how many were sold, which makes models of different sizes comparable.
How we count
Counts are unique owner complaints (by NHTSA ODI number) filed with NHTSA for each Mazda CX-9 model year, from NHTSA's public complaints data fetched July 2026 to November 2026. A complaint counts as a transmission complaint when NHTSA's component list for it includes Power Train (transmission, transfer case and driveline).
Per 1,000 sold divides complaints by published U.S. calendar-year sales for that year. A year needs at least 5,000 sales to get a rate, and a model needs at least 3 such years for its overall rate. The comparison median covers every model with at least 50 transmission complaints that clears those floors.
These are complaint rates, not failure rates. Owners report some problems more than others, and a complaint is not a confirmed defect.
Sources
- NHTSA complaints by vehicle (owner complaints API) — National Highway Traffic Safety Administration
- NHTSA recalls by vehicle — National Highway Traffic Safety Administration
- Report a vehicle safety problem — National Highway Traffic Safety Administration