Brakes vibrate

Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 2007 SATURN VUE
  • 3.3L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 122,000 MILES
I recently got my brakes checked because the pedal shakes when I brake. Particularly on ice, snow or wet pavement. The mechanic said the brakes were fine, but I disagree. Just yesterday the brakes vibrated when I was braking on snow. This vehicle has AWD is this common? I live in Wisconsin, I am very hesitant Any to drive on the wet pavement now. Any suggestions?
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Wednesday, January 22nd, 2020 AT 8:28 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

That sounds like the anti-lock brakes are engaging. Do you hear any sounds from the front of the vehicle? Does it ever do it on dry road conditions?

Joe
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Wednesday, January 22nd, 2020 AT 9:01 PM
Tiny
SHERILYN FRANKLIN
  • MEMBER
It also does it on dry pavement, infrequently. I haven't noticed any sound just the vibration.
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Friday, January 24th, 2020 AT 9:11 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

At first, I want to say it is a warped brake rotor, but you would feel that all the time when braking. Based on your original description, it sounds to me like the ABS is actuating.

To be honest, the most common cause of this type of condition is related to a wheel speed sensor that is failing. Now, if you told me it never does it on dry roads, I would say the ABS is working properly.

What you can do is check each of the wheel speed sensors. It is a little time consuming and requires a little knowledge of using a digital multi meter. Here is a link that explains how to do it. I will add a few extra links below to help with the process.

__________________________

https://www.2carpros.com/articles/abs-wheel-speed-sensor-test

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

________________________

I attached two pics below indicating sensor location. Pic 1 is front and there is one on both sides of the vehicle and pic 2 is the rear.

Let me know if this helps or if you have other questions.

Take care,
Joe
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Friday, January 24th, 2020 AT 9:28 PM
Tiny
SHERILYN FRANKLIN
  • MEMBER
Will do, thanks.
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Friday, January 24th, 2020 AT 9:33 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Happy to help. Please let me know if I can help.

Take care,
Joe
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Friday, January 24th, 2020 AT 10:13 PM

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