How come my car’s key won’t turn? If your car key won’t turn, there are a few possible explanations. It could be that the key is simply worn out and needs to be replaced. Alternatively, the problem could be with the ignition itself. If the car key won’t turn in the ignition, it may be because the ignition switch is not in the “run” position. Another possibility is that there is some sort of obstruction preventing the key from turning, such as a build-up of dirt or grime. If the car key is new, it might just need to be cut down to size. If the car key is bent, it might need to be straightened out. Lastly, if the steering wheel is locked in position, it may cause this issue.