United States 00V074000
Mazda North American Operations
The problem
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.
Risk
THIS CONDITION COULD CAUSE REDUCED BRAKE EFFICIENCY, INCREASING THE RISK OF A CRASH.
What owners should do
DEALERS WILL INSPECT THE RESERVOIR CAP AND REPLACE IT, IF NECESSARY.
Units 71000