it won't fit, the 4th and 5th gen have the power antenna that always shits out. You'd have to get the mounting base from a newer celica, one that has the screw type antenna. I'm trying to find one for my 86gts, but having no luck. i'd try the junk yard, like zero said, but bring tools so you can remove the base from one, that's pretty much the only way to have a functional one at least.