turboawd

typically when my ac is on(engine revs higher), and a while pressing the brake pedal at a certain position, i get a duck quack like sound. if i find the right brake pedal position, i can maintain the quack sound constant. i'm guessing i may have a vaccum leak somewhere......also when my car is off, the vacuum bleeds off and the brake pedal is stiff.

i never did have the brake recall done on my car.

turboawd

ok, the car had been sitting for a while until recently. i took the car for a spin tonight, and the noise was only there when the brakes were warm, and while moving. my front pads are making the noise when the brake pedal is partially pressed. i just need to brake harder i guess. lol

Hyper_545i

Funny you mention this. I noticed a "quack" sound coming from my brakes after a drive as well. It seems to sound like it is coming from the rear brakes. Only when braking in reverse. I did have the Brake Recall performed and it seemed to happen after that. Funny thing is when I took it to the dealer on the next service, they could not replicate the issue. I hear it when backing in to my spot at work and in the garage. Not sure what it could be.

subterFUSE

If you never had the brake vacuum pump recall done, I would suggest getting it done.
I had my power-assist brakes quit on me before the recall was issued, and nearly had a few wrecks because of it.