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Hi Guys, I have been lurking around here for a while and recently bought my first Porsche (2002 C4 Cab, 6 Spd). I love the car, but admittedly, have not driven it too much yet (onLy about 30 miles so far). The PPI checked out very clean with no issues needing to be addressed. However, when I picked up the car, I noticed that the brakes require more pressue than I expected. They work just fine, but again, seem to require slighy more pedal pressure than other cars I have owned. Is this typical or is this something I should dig further into? Could it be the brake booster? Thanks in advance.

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Well, a further review of the maintenance records revealed a fluid fluch 2k miles ago, but I flushed again to be certian...bummer, no improvement. Can you please advise as to how I go about testing the booster? Also, is this a DIY repair?

Thank again!


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I assume you are not getting any brake warning lights (pad wear or low fluid)?

PSM or ABS lights?

Does the pedal sink after first application?

Correct Loren, no warning lights. Yes, the pedal does sink after first application, its just a bit more firm/stiff than I would think it would be.

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Check behind the pedals at the master cylinder and see if there is any weeping. If so, then the master cylinder is leaking and will need to be replaced.

A good booster will lose some pedal pressure (with the engine off) as the vacuum is used. But the pedal should only go so far and then get firm. If it continues to go down then it may be the master cylinder.

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Are you sure this isn't normal? My 1999 c4 996 has much more 'feel' than ordinary cars. (feel = have to press harder)


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Beginning to believe that I am experiencing the normal feel, which i am just getting used to.

Thanks all for the help!

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