Soooo ... my question is whether the kit you installed actually worked, and did it seem to do all three of those things? Do you know if "improved routing" means consideration of traffic, construction, etc.? And if everything worked, can you direct me to a link for the kit you bought?
It's (searching for word, failing) astounding that Toyota has made all of this so hard.
You bet. By all means, go find the "savagegeese" video on YouTube, in which a whole bunch of Toyota folks talk about how absolutely wonderful all of this is. And then Toyota couldn't have made it more difficult to keep all of these "Connected Services" working.
Here is a link to what I purchased:
Dynamic Nav Renewal - toya00cy1721. Genuine Toyota® Parts & Accessories. Formerly Boch Toyota South Parts. Manufacturer Warranty. From the Dealership to your Door. Experts standing by.
toyotaparts.bochtoyotasouth.com
It's a source that has been reported a number of times here in this forum, so it seems to be trustworthy. "Worked for me."
It was exceedingly easy to prove that my Dynamic Navigation stopped working after it had expired, and when it started working again, after my local dealership installed the renewal kit. Just a couple of miles from that dealership was a new street that "disappeared" after Dynamic Navigation expired. So I went straight to that street again after the renewal was installed, and it showed up again. Simple as that.
Also, you can't help but notice the banner that pops up on the screen, which says something like "Optimized route now downloaded from the cloud" right after you finish setting a destination into your navigation system. Whatever the wording is, you'll get that if you have Dynamic Navigation installed, and you won't get it if you don't.
As for traffic and construction and such, I'm really not sure. I believe that the navigation system on its own will try to reroute you to avoid traffic jams and such. Dynamic Navigation will certainly provide the latest maps, and perhaps it'll take over whatever might have been reported for traffic and such -- but I certainly don't know for sure about that.
I hope this helps. And a few words of advice -- you might call around to all of the dealerships in your area, and ask about how much they would charge you to install the kit. You might find a better deal than I did. Good luck!