ignition key tumbler question

I guess thats what one could call it. Is it hard to change? When I bought my car it came with a spare tumbler with key because the current key hole fixture is broken where you hang on to it to turn your key. That black outer piece falls off and if you start it without holding it in place you have to be careful not to bend/twist the key. Seems to be getting worse so I need to change out this tumbler. Anyone ever do it? Is it a big deal? Thanks for any insight! Eva

[81DaytonaPaceCar]

Are you talking about the ignition key or exterior door key?

Door key is pretty simple.

Ignition key...depends on what broke where...might be easy, might not...never done that one.

[liv2ryde]

The ignition key. I have a whole replacement tumbler type thing with key that looks like it would install into the steering column, its about the size to fit right in the palm of your hand. Thanks