Brake warning light on in AM on Porsche 911

The brake warning display and warning gong can activate, typically after the first start of the day. The warning light/gong might stop after idling for a short time. This fault is usually caused by low stored hydraulic pressure due to a failed high pressure accumulator.
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Average mileage: 55,000 (55,000–55,000)
9 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998
10 people reported this problem
1 person shared problem details
1994 Porsche 91155,000
braking warning light stays on togther with warning sound for few seconds when starting after car has been parked overnight. Have not fixed yet.
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