Originally Posted by supershaft
That's my guess too. I have seen a rash of troubles caused in the last few years from the rubber hoses coming apart on the inside. Especially on oilheads for some reason but still . . . .
Agree on that. Been driving old bimmers since around '95 & there's been many a brake problem fixed by replacing the rubber lines. They can even fail by acting as a one way valve holding pressure & not releasing.