I'm not quite sure if you need any special tools for replacing it. I would be carefull though because I just had some trouble with my ignition switch, what happened is the wire that supplys powwer to horn, wipers, etc... was over heating and melted the blue plug to the point that id didt work anymore. I dont know why this is happening but its dangerous and I'm still trying to figure out why. I'll let you know when I do.
Johan