Many aging Ford Focus vehicles have this charming tendency to lock up the ignition switch making it impossible to start your vehicle no matter how hard you beat the steering column with your head/fist. There are no warning signs that the ignition switch is about to fail.
Pretty frustrating that Ford hasn't issued a recall or even put out a notice. What would happen if someone pulled over to attend to a baby while driving in -40°C Canadian weather? One minute everything is totally fine and the next minute, you could be trying to flag down help on the highway and keep a baby warm at the same time. Sub-optimal.
Anyway.... here are some tips for replacing it yourself for cheap.