I've got a 2006 Highlander Hybrid purchased in August 2005. My DVD version is 04.2. I've seen newer versions on eBay, and want to update. My question is: Does anyone know whether or not the 2006 Hi Hy uses the Gen 5 software? Is the latest update that I am looking for Gen 5, ver 7.1?

Try the 7.1 and see if it works.

outolunch, I also have a 2006 Highlander Hybrid. Did you find any upgrade to your 04.2? I would like to upgrade mine as well...

You need to tell everybody what the U number is on the disk, then we would all know what you are asking.

Sorry my bad, I meant to ask Ventivent if he had any luck trying your suggestion to upgrade his dvd Nav to 7.1. I have the 06 HH with the same version 4.2.