I just bought an '05 Prius. It has the standard key option. I'd really like to upgrade to the smart key - does anyone know of an aftermarket kit for this? Or if I can buy a module and matching keys on the used market? Also, I'm going to convert my Prius to PHEV (see: YAPiP - recreating pEEf's approach | PriusChat) - so if you know of any technical resources on the smart key system I'd love to hear about them (maybe I'll make my own smart key if I can figure out how the existing system works). Thanks!
Was anything ever discovered? Been searching the web and cannot find anything. Have a regular key system would like to upgrade to SKS if its possible
Anything is possible, given enough time and money. However, practically speaking, attempting to upgrade your car is not feasible. A better approach is to sell this car and buy a car with SKS.
TL ; DR: In your case, it's not an 'upgrade.' It's a 19 year-old car. Use the metal keys to their advantage. Make copies and tie-wrap one under the car JIC. If you're more resolute? Smart key Retrofit | PriusChat