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2020 Forester: Clunking Noise Over Bumps - Front Suspension

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Mike T. · rep 0 · May 22, 3:15 AM · 1 replies · solved · Question

Vehicle: 2020 Subaru Forester Premium

Hi all,

I've got a 2020 Subaru Forester Premium with about 45,000 miles. Lately, I've been hearing a distinct clunking or rattling noise coming from the front end, especially when I go over speed bumps, potholes, or uneven pavement. It's not constant, but it's definitely noticeable and sounds like something is loose.

It feels like it's coming from both sides, but maybe a bit more pronounced on the driver's side. The steering feels a little less precise than it used to, too. I haven't hit any major potholes recently, so I'm a bit stumped. Any ideas on what might be causing this clunking sound in the front suspension?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:15 AM

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ClearTheCode admin answer:

The clunking or rattling noise from the front suspension of your 2020 Subaru Forester, especially over bumps, is a very common complaint and usually points to worn or loose suspension components. Given your mileage, this is a reasonable expectation for some parts.

Common Causes:

  1. Sway Bar End Links: These are a very frequent culprit for clunking noises. The ball joints on the end links can wear out, causing play and noise when the suspension articulates.
  2. Sway Bar Bushings: If the bushings that hold the sway bar to the frame wear out, the sway bar can move and create a clunking sound.
  3. Strut Mounts/Bearings: Worn strut mounts or bearings can cause clunking, especially when turning or going over bumps. They can also affect steering precision.
  4. Lower Control Arm Bushings/Ball Joints: While less common at your mileage, worn bushings or ball joints in the lower control arms can also lead to clunking and a loose feeling in the steering.
  5. Loose Components: Sometimes, a bolt on a suspension component might simply be loose.

Troubleshooting Steps:

  1. Visual Inspection: With the vehicle safely on jack stands, inspect the sway bar end links, bushings, and control arm components for any visible signs of wear, tears in rubber boots, or excessive play.
  2. Shake Test: Grab the sway bar and try to move it. Check for play in the end links. You can also try to shake the wheel at 12 and 6 o'clock (for ball joints) and 3 and 9 o'clock (for tie rods) to check for play.

When to See a Shop:

It's advisable to have a professional mechanic inspect your suspension. They have the proper tools and experience to:

  • Safely lift the vehicle and perform a thorough inspection of all suspension components.
  • Identify the exact source of the clunking noise.
  • Replace any worn or damaged parts, such as sway bar end links, bushings, or strut mounts.
  • Perform a wheel alignment if necessary after replacing components, as worn parts can affect alignment. Addressing these issues will restore ride comfort and handling, and prevent further wear on other components.
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