Why does my 2021 Highlander make a popping noise while driving?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

medium

Difficulty

medium

Severity

4 min read

639 words

Problem Statement

Learn how to diagnose and repair popping noises in your 2021 Toyota Highlander with step-by-step instructions and required tools.

Affected Component

suspension, wheel bearings, CV joints, exhaust system, tires

Symptoms

•Popping noise occurs while driving, especially during turns or over bumps.
•Noise may vary depending on speed or road conditions.
•No warning lights or dashboard alerts are present.

Diagnostic Steps

1
Visual Inspection: Inspect front and rear suspension components for visible damage or wear.
2
Road Test: Drive the vehicle and listen for the popping noise, noting when it occurs.
3
Check Wheel Bearings: Lift the vehicle and rotate each wheel manually to listen for noises.
4
Inspect CV Joints: Look for tearing or damage to the CV boot and check noise during turns.
5
Exhaust Check: Inspect the exhaust system for loose hangers or damaged components.

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

•Car jack and jack stands
•Lug wrench
•Torque wrench
•Flashlight
•Rubber mallet
•Basic hand tools (screwdrivers, pliers, etc.)
•Inspection camera (optional)

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Diagnostic Steps

1
Visual Inspection: Inspect front and rear suspension components for visible damage or wear.
2
Road Test: Drive the vehicle and listen for the popping noise, noting when it occurs.
3
Check Wheel Bearings: Lift the vehicle and rotate each wheel manually to listen for noises.
4
Inspect CV Joints: Look for tearing or damage to the CV boot and check noise during turns.
5
Exhaust Check: Inspect the exhaust system for loose hangers or damaged components.

Solution

Possible Causes

Suspension Issues: Worn or damaged components such as struts, bushings, or control arms.
Wheel Bearing Failure: A failing wheel bearing can create a popping or grinding noise.
CV Joint Failure: If the constant velocity (CV) joints are damaged, they can produce popping sounds during turns.
Loose or Damaged Exhaust System: A loose exhaust component can create a popping noise as it moves.
Tire Issues: Debris lodged in tires, uneven wear, or damaged tires could cause similar noises.

Tools Required

Car jack and jack stands
Lug wrench
Torque wrench
Flashlight
Rubber mallet
Basic hand tools (screwdrivers, pliers, etc.)
Inspection camera (optional)

Repair Instructions

1. Suspension Repairs:

Replacing Worn Bushings:
- Remove the wheel using the lug wrench.
- Use a socket wrench to unbolt the control arm or strut assembly.
- Replace the worn bushings with new ones (ensure they are properly lubricated).
- Reassemble components and torque to manufacturer specifications.
Replacing Struts:
- Remove the wheel and unbolt the strut from the control arm and the top mount.
- Install the new strut, ensuring all bolts are tightened to the correct torque specifications.

2. Wheel Bearing Replacement:

Remove the wheel and brake caliper.
Unbolt the hub assembly and remove the wheel bearing.
Install the new bearing, ensuring it is seated properly.
Reassemble the hub and caliper, and torque all bolts to specifications.

3. CV Joint Replacement:

Remove the wheel and brake components to access the axle.
Unbolt the CV joint from the transmission and wheel hub.
Replace the CV joint with a new one, ensuring all clips and seals are properly installed.

4. Exhaust Repairs:

Tighten any loose bolts in the exhaust system.
Replace any broken hangers or brackets.
If the exhaust is damaged, replace the affected section.

5. Tire Issues:

Inspect tires for any signs of damage or wear.
Rotate or replace the tires as necessary.
Ensure proper inflation and alignment.

Conclusion

After performing these diagnostic and repair steps, take the vehicle for another test drive to confirm that the popping noise has been resolved. If the issue persists, a more in-depth inspection may be required, potentially involving a professional mechanic.