2011 Mazda CX-9 Brakes Problems
- Complaints
- 99about this part
- Share
- 58%of 171 total for the year
- Median mileage
- 71,224miles
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA recorded 99 complaints about the brakes of the 2011 Mazda CX-9, 58% of the 171 complaints for this model year. Where a mileage was given, the median is 71,224 miles. 4 of these say a crash was involved, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I went from having brakes to having to push the brake to the floor, which still did not stop the car, all in the same day. I was lucky not to wreck but could not stop for stop signs or stop lights all while my 22 month old was in the vehicle. Something in the brake system messed up, and it still had a full thing of brake fluid. I believe that it is the brake booster causing this problem.”
NHTSA complaint #11327780, filed 2020-06, 124,750 miles“I started noticing it was taking a long distance for my vehicle to come to a stop. I took it to my mechanic. We took it for a test drive and he confirmed there was a problem with the power brake booster. When he was driving, if he pressed on the brake pedal hard, he could make the car have a long beep sound. Otherwise, he, too, noticed the long distance required for the car to stop.”
NHTSA complaint #11172750, filed 2019-01, 102,000 miles“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“The brake pedal has become extremely hard and it doesn't stop quickly anymore. It feels like the brakes are going to completely fail and not stop the car. A car in front of me suddenly stopped to make a left turn and as I applied my brakes, they became very hard and took a very long time to stop, I almost rear ended the car ahead of me.”
NHTSA complaint #10597065, filed 2014-06, 31,000 miles“Vehicle would not slow or stop, had to push pedal hard all the way to the floor to get it slowed. Really thought we were going to have an accident. Took vehicle into shop on 6/5/2015 and was told it was the power brake assist module was bad and needed to be replaced. Owner of shop said we were lucky to not have been in an accident. Come on Mazda you are aware of this situation.”
NHTSA complaint #10723589, filed 2015-06, 96,000 milesRelated service bulletins
- 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…
- 10251387Feb 12, 2024Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as…
- 10208556Feb 23, 2022Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as…
- 10173097Mar 12, 2020Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as…
- 10170657Jan 8, 2020Some vehicles exhibit brake related concerns such as brake noise, brake judder or brake dragging. If you encounter a customer complaint for any one of these symptoms, refer to…
- 10153307Jan 14, 2019Mazda North American Operations has approved an additional on-car brake lathe as an option for MNAO authorized equipment. The Pro-Cut On-Car Brake Lathe has been added to the…
- 10153227Jan 10, 2019Some vehicles exhibit brake related concerns such as brake noise, brake judder or brake dragging. If you encounter a customer complaint for any one of these symptoms, refer to…
- 10153319Jan 3, 2019Some customers may report a slight clunk/bang/buzz noise or jolt from the front of the vehicle. This concern will most likely occur during the vehicles first forward movement…
- 10148003Oct 10, 2018Mazda North American Operations has approved an additional on-car brake lathe as an option for MNAO authorized equipment. The Pro-Cut On-Car Brake Lathe has been added to the…
- 10142515May 11, 2018Mazda North American Operations has approved an additional on-car brake lathe as an option for MNAOauthorized equipment. The Pro-Cut On-Car Brake Lathe has been added to the MNAO…
Brakes: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2023 | 2 | 15% |
| 2022 | 1 | 9% |
| 2021 | 4 | 10% |
| 2020 | 2 | 11% |
| 2019 | 2 | 4% |
| 2018 | 11 | 9% |
| 2016 | 11 | 10% |
| 2015 | 3 | 9% |
| 2014 | 9 | 17% |
| 2013 | 16 | 24% |
| 2012 | 143 | 65% |
| 2011 | 99 | 58% |
| 2010 | 91 | 47% |
| 2009 | 17 | 29% |
| 2008 | 30 | 17% |
| 2007 | 7 | 8% |
Other parts of the 2011 Mazda CX-9
25 complaintsAir bags
22 complaintsEngine
15 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 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