After five years of use I finally had to change the battery in my every day key to the car. After completing that task I decided to check the spare key that has been sitting in a drawer unused for five years. Lo and behold it did not work. Thinking perhaps it was the battery too, I opened the case , checked the battery with a volt meter and it tested fine. Do these keys have to be coded individually to the car? Perhaps the dealer never "activated" the "spare' key.
Help is appreciated.
Stay charged my friend.