How do you disarm the alarm in an 2010 highlander?

To disarm the alarm in a 2010 Toyota Highlander, use the key fob to unlock the driver's side door. If you don't have the key fob, inserting the key into the driver's door lock and turning it to unlock should also disarm the alarm. Additionally, starting the engine with the key can help disable the alarm system. If the alarm persists, consult the owner's manual for further troubleshooting.