Question about 2005 Mazda MPV

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Mazda MPV 2002 Power brakes lose power with a cold engine

My MPV recently began having problems with the brakes from a cold start. The brakes feel stiff, as if they are full of air. And the cars response is slow on the brake. After a while, the power comes in and the pedal depresses easily. I'm pretty sure the power is not running to the brakes. I just replaced the pads and the brake fluid, hoping that would do the trick, but no luck. I'm sure there is something wrong inside the master cylinder but they said it all checks out at BrakesPlus. Is there a valve inside that could be stuck? Sunday I drove 2 hours from Fort Collins to Denver in 0 degree weather and the power brakes were not working the whole way.

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  • kaplange Dec 15, 2008

    I'll have them check this. Thanks!

  • Anonymous Dec 19, 2008

    I have a 2001 Mazda MPV. Power brakes do not work when the engine is cold in cold weather. After warm up, brakes work fine.

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There is a vacuum check valve to the brake booster. This will be the likely fault.

Posted on Dec 15, 2008

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