If a crack occurs, it could result in one or both studs fracturing. The master cylinder could then separate from the vacuum booster, when the brakes are applied, preventing the service brakes from activating increasing the risk of a vehicle accident.

Service Brakes, Hydraulic — Power Assist — Hydraulic

Date Announced
FEB 05, 1996
Vehicles Affected
108,000
NHTSA Campaign #
96V024001
Summary
The studs which attach the brake master cylinder to the power brake vacuum booster assembly can develop stress corrosion cracking after being operated for an extended period of time in the southern California location.
Actions
Dealers will replace the power brake vacuum booster assembly.
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