Just picked this up - Prius C

[CTScott]

Originally Posted by nookandcrannycar

...."disappear"........then...Aha! Light bulb! Will all of the needed part numbers for 2012 Model Year hand crank operation for the driver side door on a 3-Door Liftback be open for purchase by a single consumer?...if so...Will future year (3rd generation but AFTER hand crank windows have disappeared) driver side door interior/'innards' accept all of the 'needed for hand crank operation' part numbers?....if not...Could the inside of the door be modified to make this a reality without huge expense? Is all of this unknowable until after the hand crank windows disappear? Are these CTScott only questions?

Embrace the future (err, present or perhaps past). Power windows have been around since the 1940 Packard and are a wonderful addition to the automobile. I have had Japanese vehicles with over 140,000 miles on them with all of the original power window hardware still working perfectly. My new Crashy #2 has manual windows and I will soon be switching them to power.

To actually answer your question - Going in the opposite direction from power to crank means changing the window regulator assembly. If the vehicle is not offered with a manual one it would mean adapting a manual one from a different or older vehicle to work.