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How to tell if your struts are going bad?

Published in Vehicle Suspension 3 mins read

Recognizing the signs of failing struts is crucial for your vehicle's safety, handling, and overall performance. Bad struts often manifest through noticeable changes in your car's ride quality, handling, and even visible wear.

Here are the primary indicators that your struts might be going bad:

Key Symptoms of Worn Struts

Symptom Description
Nose Dive (Braking) The front of your car dips excessively and quickly when you apply the brakes, indicating reduced control over weight transfer.
Bouncy Ride Your vehicle continues to bounce multiple times after hitting a bump or dip in the road, rather than settling quickly.
Excessive Body Roll/Sway The car leans noticeably and excessively to one side when turning corners, feeling unstable.
Uneven Tire Wear Tires show unusual wear patterns, such as "cupping" or "scalloping," where the tread appears scooped out in spots, due to poor road contact.
Rear Squat (Acceleration) The rear of the car sags excessively or "squats" when you accelerate rapidly from a stop.
Steering Wheel Vibration You may feel a persistent shaking or shimmy in the steering wheel, especially at higher speeds, which could be related to suspension issues.
Unusual Noises Hearing clunking, knocking, rattling, or squeaking sounds coming from the suspension, particularly when going over bumps or rough roads.
Leaking Fluid Visible oil or fluid seeping or leaking from the strut or shock body indicates a seal failure, meaning the strut is no longer dampening effectively.

Detailed Breakdown of Symptoms

When struts begin to wear out, they lose their ability to effectively dampen suspension movement, leading to various issues:

  • Compromised Stability and Control:

    • Bouncy Ride: A primary function of struts is to dampen oscillations. If your car feels like a pogo stick after going over a bump, the struts are no longer absorbing the impact and are allowing the springs to bounce freely.
    • Nose Dive and Rear Squat: Struts control weight transfer during acceleration and braking. Worn struts cause the front to dive excessively during braking and the rear to squat when accelerating, compromising vehicle control and braking efficiency.
    • Excessive Body Roll: When cornering, worn struts allow the vehicle's body to lean heavily, reducing stability and making the car feel less responsive and potentially unsafe during turns.
  • Tire and Steering Issues:

    • Uneven Tire Wear: Since struts help maintain consistent tire contact with the road, their failure can lead to tires "skipping" or bouncing slightly, causing specific, irregular wear patterns like cupping or scalloping. This not only reduces tire life but also affects grip.
    • Steering Wheel Vibration: While many factors can cause steering wheel vibration, worn struts can contribute by failing to absorb road imperfections, transmitting more vibrations directly to the steering system.
  • Audible Warnings:

    • Unusual Noises: A common sign is hearing knocking, clunking, or rattling sounds, especially when driving over potholes, speed bumps, or uneven surfaces. These noises often indicate worn out internal components, bushings, or mounts within the strut assembly.
  • Visual Cues:

    • Leaking Fluid: Inspecting your struts directly can reveal fluid leaks. Struts are filled with hydraulic fluid, and if you see oil residue or wetness on the exterior of the strut body, it means a seal has failed, and the strut can no longer perform its job.

What to Do If You Suspect Bad Struts

If you notice any of these symptoms, it's advisable to have your vehicle inspected by a qualified mechanic. Driving with worn struts not only compromises your comfort but, more importantly, can significantly impact your vehicle's safety, braking distance, and handling capabilities. Prompt replacement ensures your vehicle maintains optimal performance and safety.