# 2012 MAZDA CX-9 — SERVICE BRAKES
> NHTSA complaint `1771859` · 2021-10-05 · Mazda Motor Corp.
## Severity
- **Deaths:** 0
- **Injured:** 1
- **Fire:** No
- **Crash:** No
- **Police report:** No
- **Medical attention:** No
- **Vehicle towed:** No
## Vehicle
- **Make:** MAZDA
- **Model:** CX-9
- **Year:** 2012
- **Manufacturer:** Mazda Motor Corp.
- **Component:** SERVICE BRAKES
## Narrative
Brake booster failure caused a near miss. Wife driving with 5 year old daughter in the vehicle. The stopping force required on the brake pedal became excessive and the stopping (safe braking) distance significantly increased causing emotional distress. My understanding is this part (brake booster) has a defective diaphragm that deteriorates over time. The extended warranty created for this particular issue did not cover the vehicle at the time of the failure.
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*Source: [NHTSA ODI](https://www-odi.nhtsa.dot.gov/downloads/) · AI Analytics · CC0 1.0*