If you'd like to upgrade the OEM door speakers in your 3rd generation
(2010, 2011, 2012, 2013) Toyota Prius, you'll first need to remove the
interior door panels. You could also add soundproofing material, replace
the power window motor or change a burnt out courtesy light bulb. To
view my complete guide to the procedure, click on the link below.
Here's the guide page -
http://www.paulstravelpictures.com/Toyota-Prius-Front-Door-Panel-Removal-Guide/index.htmlThe procedure should be similar for the previous generation 2004-2009 Prius and other Toyota, Lexus or Scion vehicles.
Cheers,
Paul