Key broke off in ignition

Just the key or the whole lock cylinder with key ?

Removal Procedure
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
Disconnect the battery negative cable.
Disable the SIR system. Refer to Disabling the SIR System
Position the steering wheel half way between the upper and lower tilt stops (if necessary).
Remove the steering wheel. Refer to Steering Wheel Replacement .
Roll back the shift lever seal from the upper and the lower shrouds.
Remove the tilt wheel lever (if necessary). Refer to Tilt Lever Replacement - On Vehicle .
Remove the 2 TORX® screws from the lower steering column shroud.
Remove the lower steering column shroud.
Remove the 2 TORX® screws from the upper steering column shroud.
Lift the upper steering column shroud to gain access to the lock cylinder access hole.
Using a bent tip awl, insert the tip into the ignition lock cylinder access hole.
Turn the ignition lock cylinder to the START position.
Using the bent tip awl, push down on the ignition lock cylinder retaining pin.
Release the ignition lock cylinder to the RUN position.

Remove the ignition lock cylinder from the lock module assembly by pulling the ignition lock cylinder away from the steering column.

There may be a video on youtube .

How you gonna turn key if half is broken in switch? Go to dealer with your vin number and proof of ownership and get another key.

And remove the broken piece so you can insert the new key.

Is the broken part of key still in ignition? if so it will need the top half of key close to it to run. the top half of key has a chip in it and without it the car wont start if this wae helpful please leave good feed back

double posted, now , double answered.
old post.
Remove the switch , by following (old post) the FSM under steering
for Ignition switch removal.
this act , unlocks the lock.
one other way, is to destroy the cylinder, (ask a thief) and turn the guts
until it unlocks,

You will need a trip to the your local parts store. You should be able to buy a brand new lock cylinder for about 15-20 dollars. Tools needed will be a socket set, steering wheel puller, phillips screwdriver, and a set of torques bits and driver. If you pull the steering wheel and unscrew the hazard knob and turn signal arm, then unscrew the turn signal switch you will be able to remove the mounting screw that holds the lock cylinder into the coulmn. install new cylinder and now you have a new key for the truck.

call the locksmith

call a locksmith, they do this kind of job everyday. tell him you want th ebroken key removed fron the Ignition switch lock cylinder. Not igntion starter.

remove the steering coloum trim. Turn the key to run position, Press locking button on back of steering coloum housing assembly, Remove lock cylinder, Disconnect the ground strap from lock preload spring ( if equiped ) . Make sure key is still in run position when you reinstall.

If the key is non functional and you cannot turn to run then you will need the tool in this picture

Go to a Nissan dealer, or a locksmith. Take your registration with you. They can make another key from the VIN #.

1993 Mitsubishi 3000 GT stalls for no good reason, you never really know for sure exactly when it’s going to happen. It might start up right away, or after a few cranks. It may be hard to start in the first place. This could be caused by a faulty ignition switch, and could be easily repaired.
.5- If the engine cranks but wont start, hold the key firmly pressed inward or frontward while trying to start.
1- If the engine starts: energetically jiggle the ignition key back and forth while the engine is running.
2- If the engine stalls at any time while doing this, then you may have a defective ignition switch.
2.5- Remove the Ignition key from the ignition.
3- Remove the four screws from underneath the steering column cover.
4- Hold the lower half of the cover with both hands and pull it apart from the upper half. You might have to use some force to overcome the locking tabs, you might have to tilt the steering wheel up or down to remove the covers.
5- Insert the ignition key back into the key cylinder (ignition switch)
6- Turn the key to the on position (don’t start the engine)
7- Move the key in and outward while observing the opposite side of the key cylinder
8- If the opposite end of the key cylinder moves even a little, while moving the key; then the wiring side of the ignition switch has popped out of the key cylinder and needs to be secured back into place. (You don’t have to replace the key cylinder)
9- Press the wiring end of the key cylinder inward and tie it down firmly with a strong nylon zip tie.
10- This should take care of the problem.
10.5- Remove the ignition key.
11- Reinstall the removed parts.

Don’t use a rubber band to tie down the loose ignition part; it will break-off when the ignition switch gets hot.