My 1988 325 touring has developed a buzzing noise when braking at speeds below about 5mph which is also felt as a rapid vibration through the peddle. Also the peddle drops a tad when the noise occurs. I could describe it sounding like a spring vibrating against a biscuit tin! It seems to happen only when the engine bay is really hot during a long run. Do you think this may be an air leak somewhere in the servo?
Cheers for any advice offered
Buzzing noise on braking
Moderator: martauto