Fob problem or key problem?
A fob can fail because the battery is dead, the buttons are worn, the case is broken, the board is damaged, or the vehicle no longer recognizes it. A remote that unlocks the door is not always the same thing as the chip or proximity function that starts the vehicle.
Why year, make, and model matter
Two vehicles from the same brand can use different fobs depending on year, trim, ignition style, and push-button start. That is why a quote needs the exact vehicle details and whether you have any working key or fob.