Twice in the past week my key has failed to start the ignition. Fan, radio, battery, etc. all works, but when I turned fully to start the engine... nothing. Not a thing - not even a click. The starting motor was not even trying to turn, and there was no error registered either. Took key in and out of ignition, still nothing. Finally got out of car, locked and unlocked door, and tried again. Started first time. Did the same thing yesterday when problem occurred again, and it worked once more. As long as it continues to start I'm not too worried. My fear is that some day the lock/unlock thing won't work and I'll be left stranded. It has never happened with my wife's set of keys - we use both keys interchangeably. Any ideas? Seems to be locking / unlocking the car fine so I'd doubt if there is a battery problem.