Removal and installation of the lock cylinder start by removing the door trim panel. Pull the weathersheet of the door locks very gently. A screwdriver is used to press the lock cylinder holding clip up, with recognition of the lock cylinder position. Second, take out the lock cylinder on the door. To install, do the reverse procedure of the un-installation and it is recommendable that the window be open before verification of the lock functioning is open to check that it is properly functioning.