2011 Mazda CX-9 Service Brakes Problems
Owners have filed 97 complaints with NHTSA about service brakes problems on the 2011 Mazda CX-9, 57% of all complaints for this model year. Half of the reports with a mileage happened before 72,623 miles. The words owners use most often: “brake booster” (36% of reports).
- 97service brakes complaints
- 72,623median miles at failure
- 4mention a crash
- 0mention an injury
- 0related recalls
- 12%of reports with a speed happened at 50+ mph
What owners describe
Phrases that appear unusually often in these complaints compared with complaints about other cars.
- Brake booster: mentioned in 35 of 97 complaints (36%)
- Hissing noise: mentioned in 20 of 97 complaints (21%)
- Pedal hard: mentioned in 9 of 97 complaints (9%)
- Master cylinder: mentioned in 7 of 97 complaints (7%)
At what mileage do service brakes problems happen?
Based on 90 complaints that reported the odometer reading.
How serious are the reports?
Of 97 complaints, 4 mention a crash.
Mazda CX-9 service brakes complaints by model year
| Model year | Service Brakes complaints | Share of that year | Median miles |
|---|---|---|---|
| 2023 CX-9 | 2 | 15% | — |
| 2022 CX-9 | 1 | 9% | — |
| 2021 CX-9 | 4 | 10% | 4,000 |
| 2020 CX-9 | 2 | 11% | — |
| 2019 CX-9 | 2 | 4% | — |
| 2018 CX-9 | 11 | 9% | 28,000 |
| 2016 CX-9 | 11 | 10% | 40,000 |
| 2015 CX-9 | 3 | 9% | 16,000 |
| 2014 CX-9 | 9 | 17% | 48,000 |
| 2013 CX-9 | 16 | 24% | 58,500 |
| 2012 CX-9 | 139 | 63% | 56,622 |
| 2011 CX-9 | 97 | 57% | 72,623 |
| 2010 CX-9 | 88 | 45% | 83,600 |
| 2009 CX-9 | 17 | 29% | 100,900 |
| 2008 CX-9 | 23 | 13% | 89,263 |
| 2007 CX-9 | 3 | 3% | 107,484 |
When owners reported it
Related recalls (0)
No safety recall lists service brakes for the 2011 Mazda CX-9. A pattern of complaints does not always lead to a recall.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
Brake booster failure. The power assisted braking has stopped working. There are no leaking vacuum hoses and the check valve is working. The brake pedal travels to the floorboard.
The contact owns a 2011 Mazda CX-9. The contact stated while driving 20 MPH, there was an abnormal sound coming from the brakes. The contact stated that the brake pedal was firm and difficult to depress while attempting to stop the vehicle. The vehicle was not diagnosed or repaired. The…
Braking trouble recent in weeks in 2011 Mazda CX-9 vehicle. Had mechanic (Euro Motorsports in Chagrin Falls OH) check it out. Turned out to be a faulty Brake Booster. Mechanic test drove car; braking failed and he almost rear-ended another vehicle. He found on line a Mazda service notice dating…
Frequently asked questions
Do all 2011 Mazda CX-9s have service brakes problems?
No. NHTSA has 97 owner complaints about service brakes for the 2011 Mazda CX-9 (57% of the 170 complaints for this model year). Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the 2011 Mazda CX-9 service brakes?
No recall currently lists service brakes for this vehicle.
At what mileage do service brakes problems start?
The median reported mileage is 72,623 miles: half of the reports with a mileage came before that.
What do owners say about service brakes problems on the 2011 Mazda CX-9?
The most frequent phrase is “brake booster”, in 35 of 97 complaints, followed by “hissing noise” (20).
See all 2011 Mazda CX-9 problems or service brakes problems across all CX-9 years.