Worn keys or pins inside the ignition cylinder can cause a connection failure that has the unit theft functions of the ignition preventing the car from being started. Sometimes the engine will not crank even though the key turns in the ignition, and this is usually caused by the failing ignition switch.
Even if the engine cranks it may still have a problem starting and this may be due to a malfunctioning receiver in the ignition system. Worn ignition switch may also cause your vehicle to die suddenly while driving. Most cars will need the steering column cover removed when replacing the ignition lock, or ignition lock cylinder before the process can begin. Others will have an access hole that allows the ignition to be removed easily.
There are a variety of securing methods on the ignition lock itself, ranging from form-fitting plastic covers to fastening screws. Before going any further in the process, it is made sure that all objects fixing the ignition lock in place are removed properly. Once these are removed the key must be placed into the ignition. Once the key is extracted by a Locksmith, it could be possible to duplicate the key.