how do I know if my struts are bad on my Toyota Highlander Fourth Generation (2020-present)

Toyota Highlander Fourth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

588 words

Problem Statement

Learn how to diagnose and replace bad struts on your Toyota Highlander (2020-present). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Suspension

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always use jack stands when working under a lifted vehicle.
•Disconnect the battery before working on electrical components.

Symptoms

•Excessive bouncing or swaying during driving
•Uneven tire wear
•Clunking noises when driving over bumps
•Vehicle feels unstable during sharp turns
•Increased stopping distance
•A noticeable drop in ride comfort

Diagnostic Steps

1
Perform a visual inspection of the struts for signs of oil leakage.
2
Check for any physical damage or rust on the struts and surrounding components.
3
Analyze tire wear patterns for uneven wear that could indicate strut issues.
4
Conduct a bounce test by pushing down on each corner of the vehicle and observing how many times it bounces before settling.
5
Drive the vehicle over a bumpy surface and listen for any unusual noises from the suspension.
6
Inspect the strut mounts and bushings for wear or damage.

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

•Floor jack
•Jack stands
•Lug wrench
•Socket set
•Torque wrench
•Wrenches
•Pliers

Parts Required

•Replacement struts
•Strut mounts
•New bolts

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Diagnostic Steps

1
Perform a visual inspection of the struts for signs of oil leakage.
2
Check for any physical damage or rust on the struts and surrounding components.
3
Analyze tire wear patterns for uneven wear that could indicate strut issues.
4
Conduct a bounce test by pushing down on each corner of the vehicle and observing how many times it bounces before settling.
5
Drive the vehicle over a bumpy surface and listen for any unusual noises from the suspension.
6
Inspect the strut mounts and bushings for wear or damage.

Solution

1. Preparation

Gather all necessary tools and parts.
Park the vehicle on a flat surface and engage the parking brake.
Disconnect the battery to ensure safety while working on the suspension.

2. Lift the Vehicle

Use a floor jack to lift the front or rear of the vehicle, depending on which struts are being replaced.
Secure the vehicle with jack stands to ensure stability.

3. Remove the Wheel

Use a lug wrench to loosen and remove the lug nuts.
Take off the wheel to gain access to the strut assembly.

4. Remove the Strut Assembly

Disconnect the brake line and any other components attached to the strut.
Remove the bolts securing the strut to the steering knuckle.
Remove the upper mounting nuts from the strut tower in the engine bay.
Carefully extract the strut assembly from the vehicle.

5. Install New Struts

Position the new strut assembly in place of the old one.
Secure the upper mounting nuts to the strut tower, tightening to manufacturer's specifications (usually around 15-22 ft-lbs).
Reattach the strut to the steering knuckle and tighten the bolts to the specified torque (generally 65-80 ft-lbs).
Reconnect the brake line and any other components removed.

6. Reassemble the Vehicle

Reattach the wheel and hand-tighten the lug nuts.
Lower the vehicle back to the ground and use a torque wrench to properly torque the lug nuts to the specified value (typically 76-80 ft-lbs).
Reconnect the battery.

7. Final Check

Inspect the strut installation to ensure everything is secure and correctly reattached.