All sound guides / Symptom guide
Clunking noise when braking
Stop driving and get help if you notice any of these:
- The brake pedal sinks, feels soft, or the car takes longer to stop; or you hear metal grinding when braking
- The steering feels loose, pulls hard, or a wheel wobbles or clunks
- Smoke, a burning smell, or any fluid leaking that smells like fuel
- A red warning light for brakes, oil pressure or engine temperature, or a flashing check-engine light
- A loud bang or clunk followed by a change in how the car handles
Pull over where it is safe, turn off the engine, and arrange a tow to a repair shop. If there is fire or smoke inside the car, get everyone out and call 911.
This is general information, not a diagnosis. Only a qualified mechanic who inspects your car can tell you what is wrong.
A clunk heard when you press the brake.
A clunk when you brake is usually something loose or worn that shifts as weight moves forward. It can come from the brakes themselves or from suspension and steering parts. A clunk followed by a change in handling should be treated as urgent.
Sources and limits
How this guide is made: we write these guides with the help of AI tools and check the facts about car parts against published sources listed on each page. Most sources do not confirm the link between a part and a specific noise. These guides are not written or reviewed by a certified mechanic.
Stop-and-tow conditions to consider
These possible conditions need urgent attention. They are not a diagnosis of your car.
- Worn suspension or steering joints (such as ball joints) — Stop and arrange a tow
- Worn control arm bushings — Stop and arrange a tow
- Loose wheel or lug nuts — Stop and arrange a tow
More warning signs for this sound
- The brake pedal sinks, feels soft, or the car takes longer to stop
- A loud, continuous metal-on-metal grinding that does not stop when you ease off the pedal, or that comes with a pulling or shaking car
- A red brake warning light is on together with the noise
- The steering feels loose or a wheel wobbles or clunks
- Smoke or a burning smell from a wheel
Common causes
This is general information, not a diagnosis. Only a qualified mechanic who inspects your car can tell you what is wrong.
These are possible causes, not a ranked list. Cause order does not show likelihood. The noise connections are our general summary. The linked sources explain the parts and, only where noted, the sound. Labels are deliberately cautious, because a description can't show how far a fault has gone. They are not findings about your car. The same part can carry a different label on another page, for example where the sound itself is a stop-driving warning sign or where a row also names another part. If anything in the stop-driving box applies, follow that first. Stop-and-tow conditions appear first; the remaining names are alphabetical. Safety badges describe priorities, not likelihood or permission to keep driving.
Stop and arrange a tow
Loose wheel or lug nuts
- Why it may make a sound
- A wheel that is not fully secured can clunk and may come off.
- What you may notice
- Often after recent wheel or tire work
Have a professional inspect it.
- Learn more: Lug nut — facts drawn from Wikipedia; CC BY-SA 4.0. Checked 2026-11-05. Wording is our own. The source explains the part. It does not confirm the link to this noise.
Stop and arrange a tow
Worn control arm bushings
- Why it may make a sound
- Worn rubber bushings let suspension parts shift under braking load.
- What you may notice
- On braking and when pulling away
Have a professional inspect it.
- Learn more: Control arm — facts drawn from Wikipedia; CC BY-SA 4.0. Checked 2026-11-05. Wording is our own. The source explains the part. It does not confirm the link to this noise.
- Learn more: Bushing (isolator) — facts drawn from Wikipedia; CC BY-SA 4.0. Checked 2026-11-05. Wording is our own. The source explains the part. It does not confirm the link to this noise.
Stop and arrange a tow
Worn suspension or steering joints (such as ball joints)
- Why it may make a sound
- Braking shifts weight forward, which can make a worn joint knock; a failed ball joint can cause loss of control.
- What you may notice
- Clunk or thud on braking or over bumps, sometimes steering looseness
Have a professional inspect it.
- Learn more: Ball joint — facts drawn from Wikipedia; CC BY-SA 4.0. Checked 2026-11-05. Wording is our own. The source explains the part. It does not confirm the link to this noise.
Urgent professional inspection
Loose or worn brake pad hardware or caliper mounting
- Why it may make a sound
- Pads or calipers that can shift in their mounts can knock when the brakes are applied or released.
- What you may notice
- At the start or end of braking, often over small bumps too
Have a professional inspect it.
- Learn more: Disc brake — facts drawn from Wikipedia; CC BY-SA 4.0. Checked 2026-11-05. Wording is our own. The source explains the part. It does not confirm the link to this noise.
Urgent professional inspection
Worn CV joint or driveshaft parts
- Why it may make a sound
- A worn drive joint can clunk when load changes between braking and accelerating.
- What you may notice
- Clunk when switching between braking and acceleration
Have a professional inspect it.
- Learn more: Constant-velocity joint — facts drawn from Wikipedia; CC BY-SA 4.0. Checked 2026-11-05. Wording is our own. The source explains the part. It does not confirm the link to this noise.
NHTSA complaint counts and recalls
Use NHTSA’s vehicle lookup to check complaint counts for your make, model and model year. No vehicle-specific counts or recall results are displayed on this page.
Component labels to look for: SERVICE BRAKES.
Complaints are reports from owners and are not verified by NHTSA. Counts are not defect rates or proof that a problem exists.
Check open recalls for your exact vehicle by VIN at nhtsa.gov/recalls. Enter a VIN only on NHTSA’s site; we do not collect it.
The retrieved data used here consists only of component labels, not your vehicle’s counts or recall status.
Recall, complaint and vehicle data: U.S. National Highway Traffic Safety Administration (NHTSA) public APIs, retrieved 2026-11-05. This site is not affiliated with or endorsed by NHTSA or the U.S. Department of Transportation.
Before an inspection
Tell a repair shop what the sound is like, when you first noticed it and any warning lights or handling changes. This guide does not provide repair steps or identify a single fault. Follow the stop-driving guidance above.
Send a correction if a fact or source needs attention.