I've had mine off for about three months. No issues yet. I do plan to replace it at some point. I got a price from Toyota here of about $70 Australian.
Cheers.
I installed a different brand recently. One wire to earth, the other connects into the powered wire of your choosing. I connected into the reversing lights and it automatically turns on the screen when I put it into reverse. The video cable had a little red wire running with it, this is the wire...