garygid wrote:I prefer to keep others out of the "guts" of my cars.
I vote FOR the lock.
However, there should be some way to deal with access to and starting of the car even if the 12v battery is discharged, or "expired".
Well, sure. All you have to do is hook a normal 12V charger up to the aux battery ... somehow ... and you are back in business. I don't know how your gen 3 Prius works, but I do hope "somehow" isn't as convoluted as it is on our gen 2 Prius. (pull the emergency key out of the "smartkey" fob, open door, pop hood, figure out the secret push-press-pry manipulations to get the triangular cover off the fuse box, find and pop up cover on positive contact, locate a ground somewhere you can clip to)