Oh That has happened to my sister and I both. I have a zx3 and she used to have a 4 door. It happened on both cars around 30, 000miles . The key wont go all the way in to the ignition. I had to have mine towed and it turned out that I need a new ignition cylinder is what I think they called it. But it took a week to fix. I faught with them to give me a rental from the dealership. The Ford dealerships around here in Mass. have bad customer service. Good luck with your car! Kepp us posted on what happens.