# 1991 MAZDA NAVAJO — SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DIFFERENTIAL PROPORTIONAL VALVE
> NHTSA complaint `269018` · 2000-12-20 · Mazda North American Operations
## Severity
- **Deaths:** 0
- **Injured:** 2
- **Fire:** No
- **Crash:** No
- **Police report:** No
- **Medical attention:** No
- **Vehicle towed:** No
## Vehicle
- **Make:** MAZDA
- **Model:** NAVAJO
- **Year:** 1991
- **Manufacturer:** Mazda North American Operations
- **Component:** SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DIFFERENTIAL PROPORTIONAL VALVE
## Narrative
THE PROPORTIONING VALVE FAILED "CLOSED" AND DID NOT ALLOW FOR THE BRAKE FLUID TO GO TO THE REAR BRAKES, AS A RESULT THE REAR BRAKES FAILED RESULTING IN THE FRONT TIRES   LOCKING UP AND SKIDDED CAUSING COLLISION.   *MJS
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*Source: [NHTSA ODI](https://www-odi.nhtsa.dot.gov/downloads/) · AI Analytics · CC0 1.0*