Table 1 shows seven common service brakes related problems of the 2010 Mazda CX9. The number one most common problem is related to the service brakes (63 problems). The second most common problem is related to the brakes failed (13 problems).
The break booster went out without any warning or indicators while driving almost resulting in a collision. There are no warning lights on the dashboard. Read details...
The vehicle suddenly lost braking power, and the brake pedal would sometimes feel "spongy" and sometimes feel rock-hard, with varying results for braking power. I went to a mechanic who said the brake booster failed, and we found this was a known problem with the Mazda cx-9, however Read details...
The brake pedal became very hard to push. I assume it could be the brake power booster or brake master cylinder. Read details...