For ignition problems, a car locksmith can fix used cylinders and deal with key-related issues

https://car-keys-locksmithjmii257.keystonescope.com/posts/the-worst-advice-we-ve-ever-received-on-car-locksmiths

For ignition issues, a car locksmith can fix worn cylinders and solve key-related problems. They can also reprogram ignition keys to match your car's security system.