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What are the common side mirror issues in the 2020 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What are the common side mirror issues in the 2020 Toyota Highlander?

What are the common side mirror issues in the 2020 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
3 min read
560 words

Problem Statement

Learn about common side mirror issues in the 2020 Toyota Highlander, including symptoms, diagnostic steps, and repair tips.

Affected Component
side mirror
Estimated Time
2-4 hours

Symptoms

  • •Mirror does not adjust
  • •Mirror glass falls off
  • •Mirror heating element failure
  • •Indicator light malfunction
  • •Physical damage

Diagnostic Steps

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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

  • •Multimeter
  • •Screwdriver set
  • •Replacement glass
  • •Adhesive
  • •Wiring diagram
  • •Replacement bulb
  • •Replacement mirror assembly
  • •Pliers

Additional Information

Affected Component
side mirror
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
8 items

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Back to Generation
Common Side Mirror Issues in the 2020 Toyota Highlander

The 2020 Toyota Highlander is generally known for its reliability, but like any vehicle, it can experience side mirror issues. Here are some common problems, their symptoms, and diagnostic steps.

Common Symptoms

  1. Mirror Does Not Adjust

    • Symptoms: The side mirror does not move when the adjustment switch is activated.

  2. Mirror Glass Falls Off

    • Symptoms: The glass portion of the mirror detaches from the housing.

  3. Mirror Heating Element Failure

    • Symptoms: The mirror does not heat up in cold weather, causing ice or fog to remain on the glass.

  4. Indicator Light Malfunction

    • Symptoms: The side mirror indicator light does not illuminate when signaling a turn.

  5. Physical Damage

    • Symptoms: Visible cracks, chips, or broken housing.

1. Mirror Does Not Adjust

Tools Required:

  • Multimeter
  • Screwdriver set

Steps:

  1. Check Power Supply: Use a multimeter to check for voltage at the mirror adjustment connector when the switch is activated.
  2. Inspect Switch: Remove the driver’s side door panel and test the mirror adjustment switch for continuity.
  3. Check Wiring: Inspect the wiring harness for any visible damage or disconnections.
  4. Test Motor: If the switch is functional, the mirror motor may need replacing; test it by applying direct power from a battery.

2. Mirror Glass Falls Off

Tools Required:

  • Replacement glass
  • Adhesive (if applicable)

Steps:

  1. Inspect the Mounting: Check the mirror housing for any broken clips or mounting points.
  2. Reattach Glass: If the glass is intact, reattach it using automotive adhesive; if damaged, replace it with a new one.

3. Mirror Heating Element Failure

Tools Required:

  • Multimeter
  • Wiring diagram

Steps:

  1. Check Fuses: Inspect the fuse box for a blown fuse related to the mirror heating element.
  2. Test Heating Element: Using a multimeter, check for continuity in the heating element leads when the switch is activated.
  3. Inspect Wiring: Look for any damaged wiring leading to the mirror.
  4. Replace Element: If the element is faulty, replace it or the entire mirror assembly.

4. Indicator Light Malfunction

Tools Required:

  • Multimeter
  • Replacement bulb (if applicable)
  • Screwdriver set

Steps:

  1. Check Bulb: Inspect the mirror indicator bulb; replace it if burned out.
  2. Test Wiring: Use a multimeter to check for power at the connector when the turn signal is activated.
  3. Inspect Control Module: If no power is present, investigate the vehicle’s signal control module or wiring harness for faults.

5. Physical Damage

Tools Required:

  • Replacement mirror assembly
  • Screwdriver set
  • Pliers

Steps:

  1. Assess Damage: Determine if the damage is to the mirror glass, housing, or wiring.
  2. Remove Old Assembly: Use a screwdriver to remove the screws securing the mirror housing to the door.
  3. Install New Assembly: Position the new mirror assembly and secure it using screws. Ensure all connectors are properly fitted.
  4. Test Functionality: Check all mirror functions (adjustment, heating, and indicators) before replacing the door panel.
Conclusion

These steps should guide you through diagnosing and repairing common side mirror issues on the 2020 Toyota Highlander. Always consult the vehicle's service manual for specific torque specifications and additional details. If the problem persists after performing these diagnostics and repairs, consider consulting a professional technician.