6 Car Noises That Mean You Should Visit a Mechanic Soon

Strange noises coming from your vehicle are often your car’s way of telling you something’s not right. While some sounds may be harmless or temporary, others can signal a serious mechanical issue that should be checked before it gets worse. Listening carefully and acting early can save you from expensive repairs and breakdowns.

Here are six common car noises you should never ignore, what they might mean, and why it’s smart to have a technician take a closer look.

1. Squealing When You Brake

A high-pitched squeal when you hit the brakes usually means your brake pads are worn down. Most modern pads have wear indicators that make this noise to warn you it’s time for a replacement. If ignored, the pads can wear down completely, leading to metal-on-metal contact with the rotors. That causes longer stopping distances and more costly repairs.

It’s best to have your braking system inspected as soon as you hear consistent squealing. Replacing brake pads is far less expensive than replacing rotors or calipers.

2. Knocking or Tapping From the Engine

A rhythmic knocking sound that increases with engine speed is often a sign of low oil or internal engine wear. The sound could come from worn rod bearings, pistons, or other internal parts that aren’t getting proper lubrication.

If your engine is low on oil or the oil hasn’t been changed in a long time, this can cause serious damage. In many cases, adding fresh oil may quiet the noise temporarily, but it’s critical to find and fix the root cause before the engine suffers permanent damage.

3. Clicking While Turning

Clicking sounds when you turn the steering wheel, especially at low speeds, often point to a failing CV joint. Constant velocity joints are part of your front axle and allow the wheels to turn smoothly. When they wear out or lose lubrication, they start to make noise, usually a clear clicking or popping sound.

If the CV joint fails completely, the car may become difficult or even impossible to drive. Early repair can prevent more extensive axle or suspension damage.

4. Hissing Under the Hood

A hissing sound from under the hood may indicate a vacuum leak, coolant leak, or even an overheating engine. If you hear it right after shutting off the engine, it could be coolant escaping from a radiator cap or hose. If the sound continues while the engine is running, it may be a vacuum hose or a loose connection.

Leaks like this may not seem urgent at first, but they can affect your car’s fuel efficiency, emissions, and engine performance. Have a technician check for the source of the hissing and correct the issue.

5. Grinding When Shifting Gears

If your vehicle grinds when you change gears, it could be a sign of a worn clutch (in a manual), low transmission fluid, or damaged gear synchronizers. For automatics, it might indicate an internal transmission problem.

Transmission issues tend to get worse quickly and can be very expensive to fix. It’s essential to check the fluid level and condition, and seek professional help if the grinding persists.

6. Roaring or Humming That Gets Louder With Speed

A deep humming or roaring noise that increases with vehicle speed often points to a bad wheel bearing. These bearings help your wheels rotate smoothly and quietly. When one starts to fail, it may cause a growling or droning sound that gets louder the faster you go.

Bad bearings can eventually cause handling issues or even a wheel coming loose. If you hear this kind of sound, especially from one corner of the vehicle, it’s time for a suspension and wheel system inspection.

Trust Your Ears and Visit BG Automotive in Colorado

No one knows your car’s normal sounds better than you. If something doesn’t sound right, don’t ignore it. At BG Automotive in Colorado, our technicians can identify and fix the source of unusual noises before they lead to larger issues. Whether it’s brake squeal, engine knock, or suspension noise, we’re here to make sure your vehicle stays safe, reliable, and comfortable to drive.

Give us a call or stop by one of our locations for an inspection today.