New Sound.....

[earljail]

Originally Posted by DeliciousYaris2007

I looked at the installation link and it said there would have to be.

"Installation Details for your 2007 Yaris

» To install this product, you’ll have to modify your vehicle.
» You will need to fabricate a mounting kit in order to install your new receiver.
» If the factory radio is replaced, the factory AUX input connection will be lost.
"

Maybe I don't understand what they are saying?

No, you don't understand. That's okay, they aren't clear

This is what you need to do, assuming you have the integrated stereo. (means it doesn't look like you can easily swap it. So the "modifications" involve buying a new part and installing it. I've never done it, but I'm sure it's a piece of cake.