2011 Mazda CX-9 Engine Problems
- Complaints
- 15about this part
- Share
- 9%of 171 total for the year
- Median mileage
- 81,000miles
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA recorded 15 complaints about the engine of the 2011 Mazda CX-9, 9% of the 171 complaints for this model year. Where a mileage was given, the median is 81,000 miles. 2 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Mazda CX-9 2011 has un-detected water pump leaks which cause to engine overheat and eventual engine death. Mazda corporate is unwilling to co-operate. Car suddenly came to a halt showing engine light on..and I had to replace the brake booster also because when I was driving the vehicle it turn off on me everywhere and I had to pay out of my pocket and im still paying for this vehicle right now my vehicle is in a garage because is not drivable”
NHTSA complaint #11183329, filed 2019-03, 130,000 miles“Same issue as everyone else hissing when brakes are compressed -or car is stopped and bad or lagging in braking. My brakes were completely down to the floor and the car kept slowly trying to roll. I had to pump the brakes. Or put the car in park. When I let the brakes go no hissing”
NHTSA complaint #10821959, filed 2016-01, 89,000 miles“Transfer case - had unusual wear and tear on the transfer case that lead me to lose steering and driving capability when driving to work. Took my car to car dealer and the transfer case was ground down and the transmission was rusting. Had no water damage and cost over $4,000. Since have researched and found that many Mazda owners have been experiences issues with their transmission and transfer case. I believe this should be looked into.”
NHTSA complaint #10934140, filed 2016-12, 81,000 miles“While driving on interstate 77, north bound, at 55mph, other motorists informed me that my car was on fire underneath. There were no dashboard warning lights or signals that came on it light up as a warning sign. I pulled over to the side of the road, the fire department and sheriff's office put out the fire and the car was towed. The car is quite new and with very low mileage. Well maintained car. No recent work other than regular oil change. Mazda denies any problems with this car.”
NHTSA complaint #10658607, filed 2014-11, 30,345 miles“Car surges unexpectedly even when gas pedal not engaged - can cause a rushed forward or reverse motion, putting pedestrians or other cars at risk. This happens daily. Problem was identified by dealership several months ago. There is a related oil leak.”
NHTSA complaint #11093569, filed 2018-05, 69,000 milesRelated service bulletins
- 11034447Jun 19, 2026This SA supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-061/25 12/17/25 DESCRIPTION If you encounter any type of electrical concern (e.g…
- 11032103Apr 21, 2026This Service Alert supersedes the previously issued SA listed below: The changes are noted in Red. SA-011/24 02/12/24, 06/06/24, 07/29/24 DESCRIPTION Mazda has developed factory…
- 11007019Aug 15, 2024If you encounter any type of electrical concern (e.g, dead battery, engine no start, DTC(s) stored...), interview the customer before proceeding with normal MGSS diagnosis by…
- 10154455Feb 4, 2019Some customers may complain of a check engine light on while driving the vehicle. If DTCs P2A04:00, P2272:00 and/or other DTCs are found during diagnosis, follow the repair…
- 10134916Feb 6, 2018ome customers may complain of a check engine light on while driving the vehicle. If DTCs P2A04:00, P2272:00 and/or other DTCs are found during diagnosis, follow the repair…
- 10092724Jun 24, 2016If an engine assembly is replaced after a catastrophic internal mechanical failure, clean the intake manifold internally before installing a replacement engine assembly. If the…
- 10085289Jun 24, 2016If an engine assembly is replaced after a catastrophic internal mechanical failure, clean the intake manifold internally before installing a replacement engine assembly. If the…
- 10092322May 27, 2016Workshop manual evap system leak inspection using the m-mds has been discontinued for some models. Instead, the workshop manual evap system leak inspection using evap leak tester…
- 10103922Feb 26, 2016Some vehicles may exhibit an engine coolant leak (a) between the lower radiator hose (b) and the thermostat housing (c). The lower radiator hose has been modified to improve…
- 10076633Feb 26, 2016Summary to be provided on a future date.
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2021 | 21 | 53% |
| 2020 | 5 | 26% |
| 2019 | 23 | 43% |
| 2018 | 76 | 59% |
| 2017 | 43 | 70% |
| 2016 | 68 | 64% |
| 2015 | 17 | 49% |
| 2014 | 19 | 35% |
| 2013 | 17 | 25% |
| 2012 | 25 | 11% |
| 2011 | 15 | 9% |
| 2010 | 23 | 12% |
| 2009 | 4 | 7% |
| 2008 | 6 | 3% |
| 2007 | 3 | 3% |
Other parts of the 2011 Mazda CX-9
99 complaintsTransmission and drivetrain
25 complaintsAir bags
22 complaintsSuspension
8 complaintsElectrical system
6 complaintsOther or unknown
6 complaintsElectronic stability control
4 complaintsSteering
4 complaintsVehicle speed control
4 complaintsExterior lighting
3 complaintsWheels
3 complaintsSeat belts
2 complaints
← All problems reported for the 2011 Mazda CX-9
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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