Service brakes, hydraulic: foundation components: master cylinder
- Component
- Service brakes, hydraulic: foundation components: master cylinder
- Manufacturer
- MAZDA NORTH AMERICAN OPERATIONS
- Vehicles affected
- 71,000
- Reported to NHTSA
- 2000-03-07
- Owners notified
- 2000-04-21
Defect description
VEHICLE DESCRIPTION: PASSENGER VEHICLES. CERTAIN RESERVOIR TANK CAPS ON THE BRAKE MASTER CYLINDER WERE PRODUCED WITH A WORN OUT DIE AND LACK VENTILATION HOLES. AS A RESULT, THE PRESSURE IN THE RESERVOIR TANK CAN DROP GRADUALLY AS THE BRAKE PAD OR SHOE WEARS AND AMBIENT TEMPERATURE DROPS. ALSO, THE PRESSURE COULD REACH A POINT THAT THE BRAKE CALIPER AND DRUM CYLINDER ARE PULLED BACK BY THE VACUUM IN THE RESERVOIR TANK WHEN THE VEHICLE IS PARKED FOR A LONG TIME.
Safety risk
THIS CONDITION COULD CAUSE REDUCED BRAKE EFFICIENCY, INCREASING THE RISK OF A CRASH.
Manufacturer remedy
DEALERS WILL INSPECT THE RESERVOIR CAP AND REPLACE IT, IF NECESSARY.