I was just wondering if even possible, if anyone has installed OEM parts for the smart key system in a lower model Prius to achieve the same result as the higher model???? While i'm at it, OEM cruise control too.
I moved this to the proper Prius c forum. The OP owns a c but posted, probably accidentally as many others, in the Prius v forum.
Unless the door handles are interchangeable between the c and regular Prius hatchback, then I would say no dice. The door handles have the necessary sensor and antenna for the SKS system so you would have to replace your non-SKS door handle with SKS door handles and that's even before considering whether the c has the necessary electronic module to accept the SKS system in the first place.
I believe the OP is looking to find out if the SKS and push button start that comes on the Prius C 3 & 4 can be retrofitted to the Prius C 1 & 2 which has a standard keyless entry remote and a key cylinder to turn the car on.