Can't remember ... but maybe 3 or 4 years ago someone posted pic's chopping the bladder out of the gas tank. Look around & you can probably still find 'em. .
Just making sure where it was. I didn't want to drill through anything while installing my PHEV pack.. *the new one*
On a 2004-2009 Prius, if you should happen to drill into the gas tank, you'll also hit the bladder. If you drill into a gas tank, you have one hell of a lot more to worry about than just hitting the bladder