brake humming/vibration

**rs4 tony** · 10-16-2011 02:38 PM

I was on the road last night doing about 75-80 and lightly hit the brakes and I heard a very loud noise from the brakes.. then I tries doing it again and I couldnt reproduce the sound... it must be when the brakes are cold it happens. also when I pull out of my driveway(again when the brakes are cold) and lightly hit the brakes(under 3mph) it hums...... any idea's of what this could be?

**darkstar** · 10-16-2011 06:02 PM

you are probably hitting the rivets on the pads! you will see lines in the rotors.

**BenSti** · 10-16-2011 07:19 PM

When did you last replace the pads? Mine do the same thing after high speed stops (150+) they get hot spots on the rotor

**dparm** · 10-16-2011 07:21 PM

Pads are always going to be noisier when they're outside their "optimal" operating range.

**rs4 tony** · 10-16-2011 07:31 PM

I had them replaced brand new with my purchase of the car on September 8, 2010 so exactly a year on the pads and they have lots of meat on them.
EDIT:Pads in front and back and rotors upfront.

**RAudi Driver** · 10-16-2011 08:45 PM

Take the pads out and take a look at them. If they are the stock pads the rivets will show about half way through their life. You think that the pads have a lot of meat on them, but when you take them out, you will see the rivets , which are supposed to wear softer then the rotors, but they don't.

**rs4 tony** · 10-17-2011 06:04 AM

you got it. thank you

**rs4 tony** · 10-17-2011 06:05 AM

they have 17.5k miles on them.

**NY07RS4** · 10-17-2011 08:19 AM

Doesn't matter how many miles as much as it does driving condition/style. Like Raudi said, remove the pads and inspect. It's one way to verify if your issue is the pins, if not at least you ruled them out.

**rs4 tony** · 10-17-2011 08:57 AM

will do. here's some pics that might/might not do justice. they are smooth to the touch.

**BenSti** · 10-17-2011 11:39 AM

Just slap it up on some cinder bricks and check out the pads, not that hard!

**musanoadsaba** · 10-17-2011 11:56 AM

Are the rivets on the front and back pads? or just the front?

**rs4 tony** · 10-17-2011 12:01 PM

Originally Posted by BenSti

Just slap it up on some cinder bricks and check out the pads, not that hard!

nah no need to. a jack will do.

**dtoys4.2** · 10-17-2011 12:25 PM

Maybe its your long hair in the way of your proper hearing and causing u to hear weird noises. Get a hair cut and then drive the car again lol. Yo u emailed bout Cliffs yet?

**rs4 tony** · 10-17-2011 01:28 PM

Originally Posted by dtoys4.2

Maybe its your long hair in the way of your proper hearing and causing u to hear weird noises. Get a hair cut and then drive the car again lol. Yo u emailed bout Cliffs yet?

lmao yo I did not. did you get an email? I can't find it on the "local" forum sites

**Tekk** · 10-18-2011 07:20 AM

Originally Posted by rs4 tony

I was on the road last night doing about 75-80 and lightly hit the brakes and I heard a very loud noise from the brakes.. then I tries doing it again and I couldnt reproduce the sound... it must be when the brakes are cold it happens. also when I pull out of my driveway(again when the brakes are cold) and lightly hit the brakes(under 3mph) it hums...... any idea's of what this could be?

I have this same exact problem. Check this video...is it the same sound? http://www.youtube.com/watch?v=jteBBxHhO7k

When I've inquired with the dealer, they (of course) couldn't recreate the problem. I have Stoptech pads on mine so I personally dont think its a product of the stock pads as much as something with the rotors. My rotors are still the originals but do no require replacement yet.

I've had it happen the same as you too....when I've been on the freeway traveling 75-80 and I press on the brake and then even when Im exiting a parking structure and just rolling to a stop and very lightly touching the brake it'll sometimes happen.

**NY07RS4** · 10-18-2011 08:25 AM

Tony, was it wet outside either of these instances? Driveway thing could have been a light surface rust situation. Highway thing could have been a small pad deposit on the rotor.

**rs4 tony** · 10-18-2011 08:39 AM

nooo it was dry out for both times and wasnt rust on it in the driveway b/c I had just gotten home from school and went back to school in the matter of 30 mins

**rs4 tony** · 10-18-2011 08:39 AM

Originally Posted by Tekk

I have this same exact problem. Check this video...is it the same sound? http://www.youtube.com/watch?v=jteBBxHhO7k

When I've inquired with the dealer, they (of course) couldn't recreate the problem. I have Stoptech pads on mine so I personally dont think its a product of the stock pads as much as something with the rotors. My rotors are still the originals but do no require replacement yet.

I've had it happen the same as you too....when I've been on the freeway traveling 75-80 and I press on the brake and then even when Im exiting a parking structure and just rolling to a stop and very lightly touching the brake it'll sometimes happen.

I'll take a look at the video in a few