ABS light due to master cylinder assembly failure on Pontiac Bonneville

The ABS master cylinder assembly may fail internally causing the ABS light to illuminate.

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Average mileage: 267,589 (267,589–267,589)
3 model years affected: 1990, 1991, 1995
4 people reported this problem
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My abs light is on and fluid is leaking where the booster and master cylinder connect