2001 Saturn SL2 Brake Pedal Pulsation

2001 SATURN
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YEVLAR
  • MEMBER
  • 2 POSTS
I drive a 2001 Saturn SL2 with 57,000 miles. Last year I drove it about 3500 miles in a period of two weeks (cross-country road trip.) Other than my regular oil changes and a bit of cosmetic work done to the front end (I hit a road cone. Don't ask.), nothing has been done to the car since a transmission flush in 2004.

About two months ago, I noticed a bit of a buzzing when turning the wheel to the right at freeway speeds, which I presumed was low tire pressure. But after putting a spot of air in the tires (one was all the way down to 12psi) the noise persisted. This further developed into the car veering left at speeds above 40mph, which made me think I probably need an alignment (I haven't had it done yet- awfully busy schedule.) Now lately I've noticed that, when applying the brakes (especially slowing down at freeway speeds) there's a bit of give-and-take in the braking. The brakes slow down the car fine, but in the pedal I can feel a steady stuttering. I'm guessing this could be related to wobbly wheels, again emphasizing the need for an alignment. I don't think it's an ABS issue, because this occurs on the slightest application of the brakes.

Is this all related to an alignment issue, or is there anything else possible wrong?
May 12, 2006 at 5:29 AM
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PEPPERMRJ
  • ✓Experienced Mechanic
  • 1,158 POSTS
If the only symptom is the pulsation in the brake pedal I would say it is a problem with the rotors. With normal wear rotors get thinner. As they get thinner they do not disapate heat as well as they do when new. They can "warp" which causes the pulsation. They can also warp from brakes that do not release or that are "ridden" by the driver.

Good luck and let us know. :)
May 12, 2006 at 12:35 PM
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YEVLAR
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Yup, it was the rotors. They were pretty much dead.

Thanks for the help!
May 13, 2006 at 12:45 PM

Suggested Repair

Inspect the brake rotors for warping or excessive wear and replace them as needed, along with the brake pads if worn.

Conversation Summary

The owner of a 2001 Saturn SL2 reported buzzing when turning right, veering left above 40 mph, and a stuttering brake pedal when slowing from freeway speeds. They suspected alignment or low tire pressure. The expert said pedal pulsation is typically caused by warped or worn rotors that no longer dissipate heat well. The owner later confirmed the rotors were badly worn.

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