DIY Cost: $ 0 Est. Time: 2 - 3 mins Difficulty: Very Easy Summary Step-by-step instructions on how to manually unlock the door of the 2016-2020 Kia Optima. What you will need Key Fob Procedure Go to the driver's door and locate the hole under the right side of the door handle. Pull the door handle and push the metal key into the hole to remove the cover of the door handle. Once the door handle cover is removed, insert the key into the door lock and twist it to unlock the vehicle. Open the door. Reinstall the cover. Pull the door handle and push the cover back to the door.