United States 91V013000
Mazda North American Operations
The problem
WHEN THE VEHICLE IS EXPOSED TO TEMPERATURES BELOW 5 DEGREES FAHRENHEIT (-15 DEGREES C), THE NEUTRAL DETERGENT USED AS AN ASSEMBLY LUBRICANT MAY STICK TO THE CHECK VALVE, PREVENTING VALVE FROM FUNCTIONING.
Risk
THIS COULD CAUSE AN INOPERATIVE BRAKE POWER ASSIST WHICHDESCREASES BRAKING ABILITY, AND PRESENTS A POTENTIAL FOR AN ACCIDENT.
What owners should do
REPLACE VACUUM HOSE ASSEMBLY.
Units 6680