Problem Statement
Learn about common issues with the keyless entry system in the 2021 Toyota Highlander, including symptoms, diagnostic steps, and repair instructions.

Toyota Highlander Fourth Generation (2020-present)
Learn about common issues with the keyless entry system in the 2021 Toyota Highlander, including symptoms, diagnostic steps, and repair instructions.
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.
After completing the repair, verify that the issue has been resolved:
To prevent this issue from occurring again:
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The keyless entry system in the 2021 Toyota Highlander is a convenient feature, but it can experience several common issues. Below are symptoms, diagnostic steps, tools required, and repair instructions for these issues.
Check the Key Fob Battery
Inspect Key Fob for Physical Damage
Verify Vehicle Settings
Scan for Diagnostic Trouble Codes (DTCs)
Open the Key Fob:
Replace the Battery:
Test the Fob:
Visual Inspection:
Repair or Replace:
Consult Owner’s Manual:
Reset Settings:
Connect OBD-II Scanner:
Read DTCs:
Address DTCs:
Reprogramming Key Fob:
Check Vehicle Antenna:
Professional Assistance:
By following these steps, you can diagnose and potentially resolve common issues with the keyless entry system in the 2021 Toyota Highlander. Always refer to the service manual for specific details related to your vehicle model.