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Clunking Noise from Front Suspension on 2020 Mazda3 Premium

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Mike T. · rep 0 · May 22, 4:49 AM · 1 replies · solved · Question

Vehicle: 2020 Mazda3 Premium

Hi all,

I've been hearing a persistent clunking noise from the front end of my 2020 Mazda3 Premium. It's most noticeable when I go over speed bumps, potholes, or any uneven road surfaces. It sounds like something is loose and rattling around.

The car has about 45,000 miles on it. I haven't hit any major potholes recently that I can recall, and the steering feels normal, no pulling or excessive play. It's just this annoying clunk.

Could this be sway bar links, bushings, or something more serious like a strut mount? I'm hoping it's a relatively simple fix. Any ideas on what to check first or common issues for this model year?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:49 AM

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ClearTheCode admin answer:

Clunking noises from the front suspension are a common complaint and can stem from several components. Given your 2020 Mazda3 Premium has 45,000 miles, wear and tear on certain parts is plausible.

Common Causes of Front Suspension Clunking:

  1. Sway Bar End Links: These are a very common culprit. The ball joints on the end links can wear out, causing a clunking noise, especially over bumps or when turning.
  2. Sway Bar Bushings: The bushings that hold the sway bar to the frame can wear out, allowing the bar to move and clunk.
  3. Strut Mounts/Bearings: The top mounts of the struts can wear, leading to clunking or popping noises, particularly when turning the steering wheel or going over bumps.
  4. Lower Control Arm Bushings: Worn bushings in the lower control arms can cause clunking and affect alignment.
  5. Ball Joints: Worn lower ball joints can also produce a clunking sound, though this is often accompanied by steering looseness.
  6. Loose Components: Less common, but sometimes a bolt on a suspension component can simply come loose.

Steps to Diagnose (Visual/Manual Check):

  1. Inspect Sway Bar Links: With the car on the ground, try to shake the sway bar end links. If there's play, they're likely worn. A shop can lift the car and use a pry bar to check for play.
  2. Check Bushings: Look for cracks, tears, or excessive compression in the rubber bushings of the sway bar and control arms.
  3. Listen Carefully: Try to pinpoint the sound's origin. Sometimes a helper can bounce the car while you listen underneath (safely).

When to See a Shop:

  • If you're unable to identify the source of the clunking, or if you lack the tools/expertise to safely inspect suspension components, a professional diagnosis is recommended.
  • A shop can perform a thorough suspension inspection, checking all bushings, ball joints, tie rods, and strut components for wear or damage. Ignoring suspension noises can lead to accelerated wear on other parts, compromise handling, and potentially become a safety hazard.
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