2011 Mazda CX-9 problems
Owners have filed 209 complaints about the 2011 Mazda CX-9 with NHTSA. Service brakes account for 46.4% of them — far more than any other system, ahead of power train at 12.4%.
Complaints209
Crashes10
Fires5
Injuries2
Deaths0
What owners report breaking
Service brakes 46.4% · 97
Power train 12.4% · 26
Air bags 10.5% · 22
Engine 7.2% · 15
Suspension 3.8% · 8
Electrical system 2.4% · 5
Unknown or other 2.4% · 5
Electronic stability control (ESC) 1.9% · 4
Severity
Of those complaints, 10 describe a crash, 5 describe a fire and 2 report an injury.
Reading the numbers
Across the 6 model years of the Mazda CX-9 in this data, 2011 ranks 3rd by complaint volume — 2012 draws the most.
Filings have fallen off, 9 in the last three years against 12 in the three before. That is normal as a generation leaves the road.
The median odometer reading at the time of complaint was 75,000 miles.
In owners' own words
I was going approx 40 mph, and went to hit the brake pedal at a light, and the brake pedal was incredibly hard and would not push down. I lifted my foot up and tried again. The pedal was still very hard but I was able to push (very hard!) And get to a stop. I did stop pass the light as it took me longer to stop the car, but luckily there were no cars ahead of me, nor any going through the intersection. Service brakes · reported at 70,203 miles
The brakes did not respond to typical pressure required to stop... When I pushed harder on the brake pedal it felt like the brakes were starting to engage, however I could not get them to fully engage and stop in time to avoid rear ending the vehicle in front of me. I took evasive action and jumped the curb and directed the vehicle at bank of newspaper stands in order to come to a complete stop. Service brakes · reported at 74,000 miles
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. Service brakes · reported at 124,750 miles
Verbatim from NHTSA filings. Complaints are unverified owner reports.
Safety recalls
Checking NHTSA for open recalls…