Currently my master cylinder is leaking. It is brand new. So is my brake booster. They were installed in March. Could a leaking brake line (which I have) cause these two things to fail? Is it likely I killed the power brake booster? I read that the master clylinder fail because thw brake boosters are bad. I installed a master brake cylinder last year but not the booster. I don't want to replace the booster again. Definitely a leak between MBC and PBB. Also leak in line at driver side tire between rubber hose and steel one.