Bad suspension struts commonly produce clunking, knocking, creaking, groaning, or banging noises when driving over bumps, potholes, or uneven surfaces. Other symptoms during turning or braking include squeaking/creaking sounds, metallic rattling, and excessive bouncing or the front or rear of the vehicle diving. Failed strut dampening, worn rubber bushings, worn strut top-plate bearings, or worn strut mounts often cause these noises.
Key Sounds Indicating Bad Struts
- Clunking or Knocking: Worn-out struts or strut mounts, often heard when hitting bumps due to metal-to-metal contact.
- Squeaking or Creaking: Indicates the struts are no longer able to dampen suspension movement, often heard when the car bounces or at low speeds.
- Metallic Rattling or Banging: Suggests internal strut component failure, broken suspension springs, or loose strut mounting hardware.
Other Signs of Strut Failure
- Excessive Bouncing: The vehicle fails to settle quickly after hitting a bump.
- Nose Diving: The front end dips significantly when braking.
- Uneven Tire Wear: Tires show abnormal tread wear patterns.
- Visible Oil Leaks: Fluid leaking from the top or sides of the strut housing.
Commonly Associated Suspension Issues
- Worn strut mounts can cause a metallic, spring-like sound.
- Failed sway bar links can produce a lighter tapping, popping, or banging sound.
Note: For a diagnosis of a defective strut, Hoover Street Auto Repair in Ann Arbor, MI, recommends having your vehicle inspected by a professional mechanic.