Brakes & Suspension guide
What Causes a Clunking Noise When Driving Over Bumps?
Written by the ASE-certified technicians at Auto Repair Shops America · 15+ years of hands-on repair experience
The short answer
A clunking noise over bumps is most often caused by worn sway bar links, ball joints, strut mounts or control arm bushings. Loose exhaust components and worn shocks can also clunk. Have it inspected — worn steering parts can fail suddenly.
Sway bar links and bushings
These small parts connect the stabilizer bar to the suspension and commonly rattle when worn.
Ball joints and tie rods
Worn ball joints clunk over bumps and can cause loose steering. Failure can cause loss of control.
Struts and mounts
Worn strut mounts clunk when turning the wheel or hitting potholes.
Frequently Asked Questions
How much does it cost to fix a suspension clunk?
Sway bar links run $150–$300; ball joints $250–$600 per side.
Can I keep driving?
Short term, but get it inspected promptly.
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