All sound guides / Symptom guide
Noise when accelerating
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 new sound while you accelerate.
A noise that appears only when you press the pedal is related to engine load or driveline torque. Describing the sound (click, whine, rattle, grind) and when it occurs helps narrow it down; see the specific symptom guides.
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.
More warning signs for this sound
- Red warning light for oil pressure or engine temperature
- Flashing check-engine light
- Loss of drive or steering, or handling change after a bang
- Smoke, burning smell or fluid leaking
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.
Urgent professional inspection
Engine knock from fuel or ignition
- Why it may make a sound
- Combustion outside the normal flame front pings under load.
- What you may notice
- Hard throttle or uphill
Have a professional inspect it.
- Learn more: Engine knocking — 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.
Arrange an inspection soon
Loose exhaust shield or exhaust leak
- Why it may make a sound
- Thin shields rattle or buzz, and leaks tick or puff under load.
- What you may notice
- Under load at certain revs
Have a professional inspect it.
- Learn more: Heat shield — 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
Transmission or driveline wear
- Why it may make a sound
- Worn gears, mounts or joints can clunk, whine or grind under torque.
- What you may notice
- On take-off or shifts
Have a professional inspect it.
- Learn more: Transmission (mechanical device) — facts drawn from Wikipedia; CC BY-SA 4.0. Checked 2026-11-05. Wording is our own. The source mentions this kind of noise for this part.
- Learn more: Drive shaft — facts drawn from Wikipedia; CC BY-SA 4.0. Checked 2026-11-05. Wording is our own. The source mentions this kind of noise for this part.
Arrange an inspection soon
Worn belt, tensioner or accessory bearing
- Why it may make a sound
- Belt-driven accessory wear can click, squeal or whine with revs.
- What you may notice
- Rises with engine revs
Have a professional inspect it.
- Learn more: Serpentine belt — 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 (clicking when turning and accelerating)
- Why it may make a sound
- A worn constant-velocity joint can click under power, especially in tight turns.
- What you may notice
- Rhythmic click while turning and accelerating
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: POWER TRAIN; ENGINE; SUSPENSION; ELECTRICAL SYSTEM.
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.