I have lost my spare key a while ago. I went to the mechanic and asked them to get a new one. They told me that I also need to bring my current main key as programming a new key will invalidate the old ones, so they have to programm them together. My mechanic also told me that if I find the old spare key I will still be able to use it, but the remote opening will obviously not work.
So far so good, recently I did in fact find my old key again. I was wondering if it works and as expected it would not open the doors without turning the key in the door lock. I was able to open it by turning it in the lock.
When trying to start the car with this key it did turn the starter motor, but no ignition was happening - i.e. the engine does not start, it only turns from the starter motor. I was googling this and realized that this seems to be common, however it did contradict what my mechanic told me.
My question is: How does this work? Is there an RFID connection between the ignition cylinder and the key? This is an old 2010 Mitsubishi Outlander, so the key isnt really that "smart".