Garage or a locksmith? Ignition lock cylinder jammed

2015 Mazda 5 Sport
I recently got into 3D printing and I printed a key for my 2015 Mazda 5 sport.

The door worked with the printed key so I proceeded to test it on the ignition lock (I also learned that there is no lock on the front passenger door neither the rear hatch which is new to me).

The key worked to turn to the starter position without much effort but the engine did not move until the immobilizer chip is programmed. At least the key works which my local locksmith could not even do.

When I tried to pull the key out of the ignition, the key only moved halfway before it got stuck. I tried to pull it with an grippy applier and it eventually broke in half. I was holding half of the blade while the other half stayed inside the cylinder.

Now that the cylinder stops working and all the online resources on cylinder removal require the cylinder to be turned to ACC. position to expose the release pin on the side. My question is is this a car problem or a lock problem? I am tryingnto figure out which has the better chance I have to get the cylinder rebuilt.

My 20/20 hindsight is if I were to do it all over again, I would remove the cylinder and do a bench key test rather than having it tested in the car. That way at least I can rebuild the cylinder myself. But now anything I think of will involve in destroying the housing just to get the cylinder out.

If there is a way to bypass the cylinder lock but still give the functionality of all the key positions, I would try it.


Work In Progress..
'18 CX-9 Signature
What a cautionary tale.. never heard of anyone trying to use a plastic key in place of a metal one. First time for everything I guess.

Maybe at this point, since you can't really do anything else, try putting the other half of the key back into the ignition to push the rest back in? Then maybe you can turn the ignition to ACC from there and remove the cylinder.
2010 Mazda 5 Sport
3D printed plastic at the thinness you need for a key won't work for long even with the door locks.

No way would it work for the ignition. Especially PLA. I would have used ABS.

Problem is now, you probably need to call a locksmith. Describe the issue. They may send you to a body shop instead.

You can always try:

I am sure they make it sound easier than it is.