What’s That Noise?

Cars make all sorts of sounds. Some are normal, some are not. Find the noise your car is making and get a plain-language explanation of what it could mean.

This site provides general information about car noises. It is not a substitute for professional diagnosis. Sounds can have multiple causes — when in doubt, consult a mechanic.

Why Your Car Makes Unusual Noises

Cars are made up of thousands of moving parts, and over time, wear and tear can cause some of them to start making noise. A new sound does not always mean something is seriously wrong — sometimes it is as simple as a loose heat shield or a worn belt. But other noises, like grinding brakes or a knocking engine, can indicate a problem that needs prompt attention.

The key is knowing what to listen for. The categories below group common car noises by where they come from — engine, brakes, suspension, exhaust, or interior. Each noise entry describes what the sound is like, lists the most likely causes, and gives you a clear urgency rating so you know how quickly you need to act.

If you are not sure where the noise is coming from, try to notice when it happens. Does it occur when you brake, accelerate, turn, or go over bumps? This can help you narrow it down to the right category.

Browse by Type of Noise

Engine Noises

Sounds coming from under the bonnet — knocking, ticking, squealing, and grinding that could point to engine problems.

5 noises

Brake Noises

Squealing, grinding, or pulsating when you brake. Your brakes talk to you — here is what they are saying.

4 noises
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Suspension & Steering

Clunks, creaks, and pops when you go over bumps or turn the wheel. These often point to worn joints or bushings.

4 noises

Exhaust Noises

Rattles, roars, and hissing from underneath or behind the car. Exhaust problems are usually easy to spot by ear.

3 noises

Electrical & Interior

Buzzing, clicking, and humming from inside the car or dashboard. Often electrical or fan-related.

3 noises

When to Get a Noise Checked

As a general rule, any noise that is new, getting louder, or happens consistently should be investigated. Here are some signs that you should see a mechanic sooner rather than later:

  • The noise gets worse over time — Sounds that start quietly and grow louder often indicate progressive wear, such as brake pads wearing down to the metal.
  • The noise is accompanied by a warning light — If a dashboard light appears at the same time as a new noise, take both seriously. Check our dashboard warning light guides for more information.
  • The noise happens when braking — Brake-related noises should always be investigated promptly, as your brakes are critical to safety.
  • The car handles or performs differently — If the noise comes with vibrations, pulling to one side, or loss of power, stop driving and get help.

Remember, this guide provides general information to help you understand what might be going on. A mechanic can diagnose the exact cause by inspecting your vehicle in person.