Noises

Loud noise that only happens on rough or bumpy roads

A noise that appears specifically over potholes, rough pavement, or gravel but is silent on smooth roads usually points to worn suspension bushings, loose heat shields, or something loose that only moves with real jarring impacts.

Difficulty
Moderate
Time
30–60 minutes (diagnosis)
DIY cost
$0–$80
Pro cost
$150–$600

Symptoms

  • Noise (clunk, rattle, or bang) only on rough roads, potholes, or gravel
  • Silent or much quieter on smooth pavement
  • May be felt as well as heard
  • Could come from the front, rear, or seem to move around depending on the bump

Likely causes

  • CommonWorn suspension bushingsBushings that have hardened or cracked allow extra movement that's only revealed by real impacts.
  • CommonLoose heat shield or exhaust hangerThese often only rattle audibly with the extra jolt of a rough road.
  • PossibleLoose or worn sway bar end linkA common source of clunking specifically over bumps.
  • PossibleItems in the trunk or cargo area shiftingLoose cargo can create noise that seems mechanical but isn't.
  • PossibleWorn strut mount or shock absorberWorn shocks/struts can allow extra suspension movement and noise over bumps.

What to do

  1. Check the trunk, cargo area, and under seats for loose items that might be shifting and causing noise, since this is an easy and free thing to rule out first.
  2. Have someone drive slowly over a known bump or rough patch while you listen from outside the car (safely) to help localize the noise.
  3. Visually inspect sway bar end links and bushings for cracking, looseness, or visible wear if you're comfortable doing so.
  4. Check heat shields and exhaust hangers, since these very commonly only make noise under the extra vibration of rough roads.
  5. Have a mechanic put the car on a lift and use a pry bar to check for play in suspension bushings, ball joints, and end links.
  6. Note whether the noise seems to come from the front or rear, or one side versus the other, and share this with the mechanic.
  7. Address worn suspension components reasonably promptly, since they affect handling and tire wear in addition to causing noise.
  8. Avoid ignoring a rough-road-only noise indefinitely, since components under this kind of intermittent stress often fail more suddenly than gradually.

Tools and parts

  • Flashlight
Sway bar end linkSearch: “sway bar end link for [year make model]”
Suspension bushing kitSearch: “suspension bushing kit for [year make model]”

When to call a pro

A rough-road-only noise is best diagnosed by a mechanic on a lift, using a pry bar to check suspension components for play that isn't obvious just by looking.

Safety

Generally low risk

Generally low risk for a careful person. Stop if anything looks different from what this guide describes.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.