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What are the common issues with the rear suspension in a 2021 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What are the common issues with the rear suspension in a 2021 Toyota Highlander?

What are the common issues with the rear suspension in a 2021 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
733 words

Problem Statement

Explore common issues with the rear suspension of the 2021 Toyota Highlander, including symptoms, diagnostic steps, and repair instructions.

Affected Component
rear suspension

Symptoms

  • •Excessive bouncing
  • •Poor ride comfort
  • •Fluid leaks around the shocks/struts
  • •Uneven tire wear
  • •Clunking noises during bumps
  • •Poor handling
  • •Misalignment of the rear wheels
  • •The rear of the vehicle appears lower than the front
  • •Uneven stance
  • •Harsh ride
  • •Pulling to one side
  • •Steering wheel not centered
  • •Vibration
  • •Instability during cornering

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

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

  • •Jack and jack stands
  • •Torque wrench
  • •Socket set and ratchet
  • •Pry bar
  • •Suspension bushings and control arm removal tools
  • •Alignment tools (if performing alignment)
  • •Safety goggles and gloves
  • •Fluid leak detection dye (if applicable)

Additional Information

Affected Component
rear suspension
Difficulty
medium
Severity
medium
Tools Required
8 items

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Common Issues with the Rear Suspension in a 2021 Toyota Highlander

The rear suspension in the 2021 Toyota Highlander, which utilizes a multi-link suspension system, can experience various problems. Here are some common issues, along with symptoms, diagnostic steps, and repair instructions.

Common Issues

  1. Worn Out Shocks/Struts

    • Symptoms: Excessive bouncing, poor ride comfort, fluid leaks around the shocks/struts, and uneven tire wear.

  2. Broken or Worn Bushings

    • Symptoms: Clunking noises during bumps, poor handling, and misalignment of the rear wheels.

  3. Sagging Springs

    • Symptoms: The rear of the vehicle appears lower than the front, uneven stance, and a harsh ride.

  4. Alignment Issues

    • Symptoms: Uneven tire wear, pulling to one side, and steering wheel not centered.

  5. Loose or Damaged Control Arms

    • Symptoms: Vibration, clunking noises, and instability during cornering.
Tools Required
  • Jack and jack stands
  • Torque wrench
  • Socket set and ratchet
  • Pry bar
  • Suspension bushings and control arm removal tools
  • Alignment tools (if performing alignment)
  • Safety goggles and gloves
  • Fluid leak detection dye (if applicable)
Repair Instructions

1. Replacing Worn Shocks/Struts

  1. Preparation

    • Park the vehicle on a level surface and engage the parking brake.
    • Loosen the lug nuts on the rear wheels.

  2. Lift Vehicle

    • Use a jack to lift the rear of the vehicle and secure it with jack stands.

  3. Remove Rear Wheels

    • Completely remove the lug nuts and take off the rear wheels.

  4. Remove Old Shocks/Struts

    • Locate the upper mount of the shock/strut.
    • Use a socket wrench to remove the upper mounting bolts.
    • Remove the lower mounting bolts and carefully take out the shock/strut from the vehicle.

  5. Install New Shocks/Struts

    • Position the new shock/strut in place and secure it with the lower mounting bolts.
    • Reattach the upper mounting bolts and torque them to manufacturer specifications.

  6. Reinstall Wheels

    • Put the rear wheels back on and hand-tighten the lug nuts.

  7. Lower Vehicle

    • Remove the jack stands and lower the vehicle.

  8. Torque Lug Nuts

    • Once the vehicle is on the ground, torque the lug nuts to the specified value.

2. Replacing Worn Bushings

  1. Lift the Vehicle

    • Follow the same steps as above to lift and secure the vehicle.

  2. Remove Control Arms

    • Locate the control arms and remove any components blocking access (e.g., exhaust hangers).
    • Remove the bolts securing the control arm to the frame and the knuckle.

  3. Remove Old Bushings

    • Use a press or a bushing removal tool to extract the old bushings from the control arm.

  4. Install New Bushings

    • Press in the new bushings until they are seated properly.

  5. Reinstall Control Arms

    • Position the control arms back in place and secure them with bolts. Torque to specifications.

  6. Reassemble Vehicle

    • Reinstall any components that were removed and lower the vehicle.

3. Performing an Alignment

  1. Alignment Setup

    • After any suspension component replacement, check alignment settings.
    • Use an alignment machine to measure angles.

  2. Adjustments

    • Adjust the camber, caster, and toe angles as needed to bring them within manufacturer specifications.

  3. Test Drive

    • Perform a test drive to ensure the vehicle handles correctly.
Conclusion

Regular inspection and maintenance of the rear suspension components are crucial for the performance, safety, and comfort of your 2021 Toyota Highlander. If you encounter any of the symptoms mentioned above, follow the diagnostic steps and repair instructions to resolve the issues effectively. Always refer to the vehicle’s service manual for specific torque specifications and part numbers.