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Re: Leaking Brake booster (archive)
[ Follow Ups ] [ 5-series (E28) Message Board ] [ Msg. Board FAQ ]
Posted by Greg T on October 01, 2000 at 14:57:17:

In Reply to: Leaking Brake booster posted by Christopher V. on September 30, 2000 at 20:48:01:

Are you sure the fluid is brake fluid (brownish) or is it power steering fluid (reddish)? I had a leak in that exact spot, but it was p.s. fluid. I replaced an o-ring INSIDE the brake booster, reinstalled everything, and it hasn't leaked since. There isn't a seal between the B.B. and M.C.- the two just bolt together. If you are leaking brake fluid, then I believe the only fix is a new master cylinder. I know they don't rebuild B.B. and I believe the same is for M.C. If you believe it is the o-ring inside the B.B., I can provide you with more details as to how I replaced it. Good luck!
Greg T
'88 535is

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