After taking out the ignition and keys to the door lock, cylinders are repaired or replaced to bring back full functionality.
https://www.scribd.com/document/931784767/What-are-the-advantages-of-using-a-certified-locksmith-for-emergencies-in-Wallsend-208246
After removing the ignition and key for the door lock The cylinders will be fixed or replaced to bring back the full function.