ABS accumulater may fail on Buick Riviera

The anti-lock brake (ABS) accumulator may fail causing loss of power brake assist. (The brake pedal will become very hard.)

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Average mileage: 146,000 (90,000–190,000)
6 model years affected: 1990, 1991, 1992, 1993, more1995, 1996
9 people reported this problem
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problem details
ABS light on. Stopping power decressed at least 50%. Also has caused the cruse control to stop working.
1996 Buick Riviera 190,000 mi,
Hard pedal I replaced the booster