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		986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical Chat
Power Brake Booster, Question

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12-15-2008, 07:38 AM	#1
BoxsterSenior Registered User Join Date: Oct 2008 Location: Gastonia, NC Posts: 38	Power Brake Booster, Question I have a hissing sound (like a vacuum leak) coming from the power brake booster. It can even be heard from inside the car when sitting in the driver’s seat. The sound goes away when the brake pedal is fully depressed, and returns when the pedal is released. Is this normal, or do I have a leaking brake booster, or something else? Any information would be appreciated. Thanks

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