Why does my 2020 Toyota Highlander make a clunking sound when driving over bumps?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

551 words

Problem Statement

Learn how to diagnose and repair clunking sounds in the suspension of your 2020 Toyota Highlander with our step-by-step guide.

Affected Component

suspension

Estimated Time

2-4 hours

Symptoms

•Clunking noise when driving over bumps or uneven surfaces.
•Noise may vary in intensity depending on the size of the bump.
•May be accompanied by a feeling of looseness in the suspension.
•Noise is generally more pronounced when driving at low speeds.

Diagnostic Steps

1
Visual Inspection
2
Physical Movement Check
3
Bounce Test
4
Road Test

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Flashlight
•jack
•jack stands
•wheel chocks
•pry bar
•socket set
•torque wrench
•wrench set
•impact wrench

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Solution

Possible Causes

Worn or damaged suspension components (e.g., struts, shocks, sway bar links).
Loose or damaged exhaust components.
Issues with the undercarriage (e.g., loose heat shields).
Problems with the body mounts or bushings.

Repair Instructions

Repairing or Replacing Suspension Components

Identify the Faulty Component
- Based on your visual inspection and physical movement check, identify which components need repair or replacement.
Gather Tools and Parts
- Tools Required: Socket set, torque wrench, wrench set, impact wrench (if available), pry bar, and replacement parts (struts, shocks, sway bar links, etc.).
Replacement of Struts or Shocks
- Steps:
  1. Remove the wheel to access the suspension.
  2. Remove any components obstructing access (brake line brackets, etc.).
  3. Unbolt the strut or shock from the top mount and lower control arm.
  4. Carefully detach the unit from the vehicle.
  5. Install the new strut/shock in reverse order, ensuring all bolts are torqued to factory specifications.
Replacement of Sway Bar Links
- Steps:
  1. Remove the wheel.
  2. Locate the sway bar link and use a wrench to unbolt it from both the sway bar and lower control arm.
  3. Install the new sway bar link, ensuring it is secure and torqued properly.
Reattach Components
- Reattach any components that were removed for access.
- Replace the wheel and lower the vehicle.
Final Check
- Conduct a bounce test again to ensure the suspension is functioning correctly.
- Take the vehicle for a test drive to confirm the clunking noise has been eliminated.

Conclusion

If the noise persists after checking and replacing the necessary components, further investigation may be required, potentially involving a professional diagnostic service to check for less common issues such as frame integrity or hidden component failure.