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This condition could cause reduced brake efficiency, increasing the risk of a crash.

Service Brakes, Hydraulic — Foundation Components — Master Cylinder

Summary
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.
Actions
Dealers will inspect the reservoir cap and replace it, if necessary.
Documents (12)

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Date Announced
MAR 07, 2000
Vehicles Affected
71,000
Mazda Recall #
89004
NHTSA Campaign #
00V074000
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