Brake master cylinder

[Tony Hoffman]

Jay,

I'm one that agrees with Bernie on this. Take it apart and clean
everything, inspect closely. If the rubber is not torn, no reason to
replace it. It will seal well, not intermittently. If you can get a rebuild
kit, by all means replace everything if you wish. However, they are not
available for any of these older Audi's that I'm aware of, and therefore a
real PITA to source each little piece. So, I jsut dissassemble, clean out
all the gunk (which is what is giving you problems IME) and reassemble.

Tony



Jay, DFWAB!
Your MC is probably OK if the pedal does not go to the floor, however
slowly.
And one does not need rebuild kits for MC or calipers unless a boot is torn
and needs replacement.
Just clean the parts well and reassemble.