EDlex300

will bleeding the brakes solve this issue? Does someone has a spare BMC 01-05?

EDlex300

I guess i answered my own question. I located a BMC of a 03. whats the lifespan of this assy? the one avail has 200+ miles.

SC300-T

What causes this issue? I think I've noticed the same thing with mines!

EDlex300

I replaced the master cylinder this weekend and I think my old assy is getting weak. If I start the car 1 hr later the buzzer sounds but it shuts off a lot faster than in the morning also the car buzzer sometimes goes on while driving. No more buzzing, so far so good with the junkyard bmc. The final test is when I give the car back to the wifey.

KingNasGS4

iTrader: (22)

In the manual for my 98, it says a buzzing is normal from the brake booster every so often and even more common when initially starting the vehicle.
That's basically the booster testing itself etc. Well at least for the 98 vehicles.

EDlex300

My old master and newly used installed does its normal self test but after 40 sec. The buzzer underneath the dash starts buzzing until I think the correct pressure for the BMC is met then it stops. The BMC I installed off a 02 has not buzzed and the wifey is very happy.