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Brake pedal vibrate

Joined
30 January 2007
Messages
59
Happen today. Was just leaving my house. Touch the brake lightly and the pedal vibrate. Couldnt be the ABS as i was moving very slowly at abount 10 km/h. Am I looking at a potential problem?
 
Happen today. Was just leaving my house. Touch the brake lightly and the pedal vibrate. Couldnt be the ABS as i was moving very slowly at abount 10 km/h. Am I looking at a potential problem?
The most likely causes are uneven brake pad deposits on the rotors, or warped rotors. Uneven brake pad deposits can form as a result of track use without proper bedding of the rotors; they can also form if you brake really hard (like in a panic stop) or excessively (like on a mountain drive). Rotors can warp due to things like getting them really hot and then splashing water on them. Uneven deposits are often mistaken for warped rotors, as noted in this white paper.

It is a lot more likely to be caused by the front rotors than the rear rotors. To cure the problem, in increasing order of cost, you can first try re-bedding the rotors and pads (the white paper has instructions), then getting the rotors turned, or, finally, replacing the rotors.
 
The most likely causes are uneven brake pad deposits on the rotors, or warped rotors. Uneven brake pad deposits can form as a result of track use without proper bedding of the rotors; they can also form if you brake really hard (like in a panic stop) or excessively (like on a mountain drive). Rotors can warp due to things like getting them really hot and then splashing water on them. Uneven deposits are often mistaken for warped rotors, as noted in this white paper.

It is a lot more likely to be caused by the front rotors than the rear rotors. To cure the problem, in increasing order of cost, you can first try re-bedding the rotors and pads (the white paper has instructions), then getting the rotors turned, or, finally, replacing the rotors.

I have a theory what is the real cause of residue on the rotors.
I think in these cases it is a bad match-up between pad material and rotor material!
I have a Subaru Outback and had the same problem. Had the rotors turned (brake specialist said there was a lot of residue embedded in the rotors) and put new pads on. Now after about 2000 KM the same thing is happening again. My conclusion: on my Outback the OE pads and rotor materials are a bad match:mad: Only remidy in my opinion is to change to other brand rotors or pads
 
Agree with the above. It's still annoying that todays car makers didn't solve this problem as in the exemple of the Subaru. I had other makes with the same problem too. Todays brakes are big enough not to get hot while driving normally. If the problem with deposits persists other pads are recommended.
 
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