Common Problems

Strange Car Noises and What They Mean

Learn to identify common vehicle sounds and their likely causes.

6 min read4 sections

1Squealing or Screeching

High-pitched sounds usually indicate belt issues or brake wear.

  • Squealing when starting: Serpentine belt slipping or worn
  • Squealing when braking: Brake pad wear indicators
  • Squealing when turning: Power steering issues

2Grinding

Metal-on-metal grinding is serious and needs immediate attention.

  • When braking: Brake pads completely worn—stop driving
  • When shifting: Transmission issues
  • When turning: CV joint or wheel bearing failure

3Knocking or Clunking

Thumping sounds often relate to suspension or drivetrain.

  • Over bumps: Worn suspension components
  • When accelerating: Engine mounts or drivetrain
  • When turning: CV joints or tie rods

4Hissing or Sizzling

These sounds suggest fluid leaks onto hot surfaces.

  • Under the hood: Coolant leak onto engine
  • After parking: Oil or fluid dripping on exhaust
  • From tires: Air leak (check for nails)

Key Takeaways

  • 1Squealing = belts or brakes
  • 2Grinding = stop and get help immediately
  • 3Knocking = suspension or drivetrain
  • 4Hissing = fluid leak onto hot surface

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