Having braking issues while driving on the highway as well as city streets the brake pedal is gets hard to depress and braking diminishes almost completely. According to research Mazda has already identified the problem exists with the power brake booster. There is a defect in the rubber of the diaphram. Instead of issuing a full recall Mazda extended the warranty period. My car of course was…
2010 Mazda CX-9 brakes problems
severe 80 complaints filed with NHTSA · avg repair $450 · see brakes across all vehicles →
Failure mileage
Complaints
80
Recalls
0
Avg fix
$450
5crashes
2injuries
When does it fail?
Of the 80 brakes complaints filed for the 2010 Mazda CX-9, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Brakes accounts for 41% of every owner complaint on file for this vehicle — the dominant problem area across 10 categories tracked.
Owners have filed 80 brakes complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
What owners are reporting 6 most recent
Driving in snowy conditions; brakes failed twice when I applied light pressure. First time, the brakes shuddered, but the car finally stopped after I applied hard pressure; the second time it happened, the brakes shuddered, and nothing happened when I first applied harder pressure. Eventually the car skidded, but it was too late. *tr
Hello! This morning on 19 december 2017, my wife was driving in a city street getting ready to cross a major intersection. The light turned yellow and she began to brake. At first they felt normal, but then the pedal went down and the brakes felt really hard and the hissing started, almost running into the back of the car in front of her. She pulled over and called me. When I…
Driving, had my 2 year old son and 7 year old daughter in the car, a car slowed in front of me and when I pushed the brakes they felt hard as a rock and the car would not stop. Slowed down at a very slow pace while pushing on the brakes as hard as I could. I practically had to stand up. I was horrified. My brakes continue to do this. Sometimes they feel very hard and sometimes they push down but…
While driving in houston highway rush hour traffic attempted to apply brakes due to traffic stopped ahead. Brake pedal was very difficult to press and made a hissing noise. After about 20-30 yards was finally able to bring car to a stop narrowly avoiding an accident. When took vehicle to Mazda dealership was told it is the power brake booster that needs to be replaced. Service tech stated…
Brakes not working due to brake booster problem which was brought to the attention of Mazda. Mazda and the transportation authority agreed on an extended warranty which is no longer in effect. There have been many more complaints for this same problem, yet a recall has not been listed for this vechicle and alot of people are paying out of pocket. I already brought this to the attention of traffic…
Had brakes trouble with your 2010 Mazda CX-9?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the brakes problem on the 2010 Mazda CX-9?
It's a meaningful issue. 80 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $450.
At what mileage does the brakes typically fail?
Across the 70 complaints that reported odometer mileage, most brakes failures cluster between 52,000 and 101,000 miles, with the median around 86,524. A quarter of owners report trouble before 52,000; a quarter make it past 101,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $450 for brakes repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to brakes?
No active recalls currently cover brakes issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2010/Mazda/CX-9.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.