There are probably thousands of different models out there...without something to tell what you have, any advice would be generic at best. A picture might help, and if you actually know the model, maybe as good.
Worse comes to worse, they make remodel plates that are large enough to cut out the tile, replace the valve, then install the repair plate. Often, the factory bezel then fits over the middle of the repair plate. If the old valve doesn't have the currently mandated anti-scald features, for a rental, it would probably be worth replacing.