1 Disconnect the battery negative terminal.
2 Remove the upper and lower steering column shrouds.
3 Insert the key into the Fiat Punto ignition switch and turn it to the ON position.
4 Working underneath the steering column, insert a small flat-bladed screwdriver into the access slot in the base of the lock assembly bracket. Depress the release button and withdraw the lock assembly from its bracket, complete with the key (see illustrations).

Depress the release button with a small screwdriver...

… and withdraw the Fiat Punto lock cylinder from its bracket


5 To refit the lock, first insert the key and turn it to the ON position. Depress the release button slide the assembly into the retaining bracket until the release button clicks into the access slot.
6 Turn the key back to the OFF position.
7 Refit the steering column shrouds.
8 Reconnect the battery negative terminal.