Symptoms
- Clunk specifically over small, repetitive bumps like expansion joints
- Noise seems to alternate with the bumps, not constant
- Sound from the front or rear depending on which sway bar is affected
Likely causes
- CommonWorn sway bar end linkThese links connect the sway bar to the suspension and develop play as their bushings wear out.
- PossibleWorn sway bar bushingThe bushings holding the sway bar itself to the frame can also wear and clunk.
What to do
- Have a helper bounce each side of the car while you listen and watch the sway bar end links for visible movement.
- Inspect the end links for a torn boot or visible play by hand.
- Check the bushings where the sway bar mounts to the frame for cracking or looseness.
- Replace the worn end link or bushing, which is usually a straightforward and inexpensive repair.
- Test drive over the same bumps that originally caused the noise to confirm it's resolved.
Tools and parts
Sway bar end linkSearch: “sway bar end link for [your car model]”
Sway bar bushingSearch: “sway bar bushing for [your car model]”
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.