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Other or unknownPart report

2011 Mazda CX-9 Other or unknown Problems

Complaints
6about this part
Share
4%of 171 total for the year
Median mileage
42,300miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 6 complaints about the other or unknown of the 2011 Mazda CX-9, 4% of the 171 complaints for this model year. Where a mileage was given, the median is 42,300 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.

“When pressing the brakes at any speed there was a hissing sound and the brakes were hard to press. Regardless of the amount of pressure I applied to the brakes they did not react and it took the vehicle longer to slow down even at very low speeds (5-10 MPH) or faster. This came on suddenly and caused me to bring the vehicle into the service department of the the dealership where I purchased it. The Mazda technician inspected the vehicles and completed a diagnostics of the vehicle and discovered that the master cylinder and brake booster have failed and need to be replaced.”

NHTSA complaint #10759279, filed 2015-08, 42,300 miles

“The A/C evaporator tank condensation drain clogs. Ours has clogged twice and the first time the water in the tank would slosh around and hear it when making a left turn. Eventually it ruined the blower motor to the A/C, which had to be replaced. Now 19 months later, we heard the water again and took it in right away and it was clogged again and the blower motor has to be replaced again. This is a design defect. There should be a better drain system. Clearly this is an issue with the Mazda CX-9 model in several years because there are videos of how to unclog the A/C drain.”

NHTSA complaint #11255039, filed 2019-09, 103,000 miles

“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.”

NHTSA complaint #10402870, filed 2011-05, 11,000 miles

“Breakbooster when we asked our mechanic to check it and end up after calling Mazda fremont that it is covered by the extended warranty for this. While drivig I thought I loss my break and was not fully working. Was scared . Mazda fremont assisted us and provided us a temporary car to use.”

NHTSA complaint #10985551, filed 2017-05

“Front lower control arms safety recall 8515g / NHTSA campaign no. 15v-451 :: july 19 2016 went to team Mazda subaru (6218 cleveland blvd. Nampa id) for recall replacements and was told it would take 2 weeks for parts to be ordered & delivered. August 8th, I called team Mazda after not receiving any call/ notification and was told I would receive a call back. Still no call back (august 9th; three weeks later).”

NHTSA complaint #10894430, filed 2016-08

Related service bulletins

Other or unknown: other model years

YearComplaintsShare of year
2023646%
2021615%
2020316%
20191426%
20182016%
2017915%
201666%
2015926%
2014917%
2013913%
201263%
201164%
201074%
200923%
2008138%
200767%

Other parts of the 2011 Mazda CX-9

Brakes
99 complaintsTransmission and drivetrain
25 complaintsAir bags
22 complaintsEngine
15 complaintsSuspension
8 complaintsElectrical system
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 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