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This could be caused by a brake booster problem - either a failed diaphragm or water in the booster itself or possible the vacuum line leaking.
Have you cleaned the drains at the front "frunk"?. If they are blocked then water can get into the booster and stop it operating.....
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2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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