I'm not sure of the year of your car, but the cars like my '97 have only one door with a key slot. The metal key, used in the passenger door will unlock all doors, the gas door and the trunk, all at once. The key, when used in the trunk, will unlock or lock everything as well. The key you show in your picture does not look like the flat key for my car. It looks like the key I received with the new ignition cylinder, which will not start the car because it does not have the chip in it. The wife has the remote and I have the flat key. I can do practically everything I want with the flat key, but I do have to lock the car through the trunk or walk around to the passenger door to use the key. I have gotten used to it.