For me, I was able to get my 2005 Toyota Sienna LE alarm activated without any component installation. It did not have this as an option when I bought the van and if you want it, you have to pay extra for it. So, after reading a post on Siennaclub.org, people had success with bringing in the van and all they did was hooked up the computer and turned on the alarm system. By default, the ECU settings have it off. There was no additional installation or anything. Another thing is that I did not have the glass break sensor installed.

Link to Siennaclub discussion about turning on inactivated alarm:

http://www.siennaclub.org/forum/inde...pic=14567&st=0

I just showed them these instructions:

http://www.siennaclub.org/forum/inde...e=post&id=5616

So, I'm assuming that this method might work with the Hybrid/LE/SE models. Anyone want to give it a try by bringing in their hybrid to get the system activated?