How do you remove the ignition cylinder on a Mustang?

Answer 1

get on the bottom of your car and push the ignition cylinder out

This works on '94's and newer...well, at least up to '04.

Step #1 is very important if you don't want your air bag to blow...

1. Disconnect the neg. cable from the battery, disconnect the pos. cable from the battery, wait 2 minutes.
2. Turn the ignition switch to RUN.
3. Insert a 1/8 inch punch up through the little hole in the trim under the lock cylinder (you don't need to take any plastic off), hold the punch in while you pull out on the key. You should be holding the lock cylinder in your hand now.

Installation is almost the reverse (your battery is still disconnected, I hope):

1. Push in the locking pin on the side of the new cylinder and turn the key so the cylinder is in the RUN position.
2. Install the cylinder into the housing--fully seated and aligned with the interlocking washer.
3. Turn the key to OFF. This lets the pin pop back out and lock the cylinder in place.
4. Test the key by turning it from OFF to START. If that checks out, go to step 5 otherwise go back to 2.
5. Reconnect the battery, Pos. first, then Neg.