# 1999 COBRA SIERRA — SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER
> NHTSA complaint `177321` · 1999-10-06 · COBRA INDUSTRIES, INC.
## Severity
- **Deaths:** 0
- **Injured:** 0
- **Fire:** No
- **Crash:** Yes
- **Police report:** Yes
- **Medical attention:** No
- **Vehicle towed:** No
## Vehicle
- **Make:** COBRA
- **Model:** SIERRA
- **Year:** 1999
- **Manufacturer:** COBRA INDUSTRIES, INC.
- **Component:** SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER
- **Speed:** 40 mph
## Narrative
AFTER ~20 MILES OF STOP-AND-GO DRIVING, BRAKED AT ~40 MPH TO SLOW/STOP FOR TRAFFIC 5- TO 6 CAR-LENGTHS AHEAD. BRAKE PEDAL SANK TO FLOOR WITH LITTLE RESISTANCE, NO SLOWING OF VEHICLE. DURING BODY REPAIRS, SHOP EMPLOYEE NOTED "SPONGY" BRAKE PEDAL FEEL, `INEFFECTIVE DURING HARD BRAKING'. TRUCK TRANSFERRED TO MECHANIC, WHO FOUND BRAKE MASTER CYLINDER LEAKING FROM REAR SEAL & RESERVOIR GASKETS - AND ALSO FOUND ALL FRONT PADS WORN `TO THE POINT OF NEEDING REPLACEMENT'. SELLING GM DEALER REPLACED PADS BUT DENIED M/C LEAKAGE, BUT SECOND DEALER (DUTTON GMC IN RIVERSIDE, CA) CONFIRMED LEAKAGE AND REPLACED M/C UNDER WARRANTY. 2,100 MILES LATER, ON 10/4/99, NOTED FRESH FLUID LEAKAGE AT REAR OF M/C; WHEN CAP REMOVED, NEW FLUID HAD TURNED VERY DARK; WHEN REPLACING CAP, NOTED FLUID "SQUISHING" FROM ROUND SEALS BETWEEN RESERVOIR AND M/C BORE.
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*Source: [NHTSA ODI](https://www-odi.nhtsa.dot.gov/downloads/) · AI Analytics · CC0 1.0*