I am looking into updating the nav on our '12 Prius v w/ ATP (DENSO). Last time I did this in 2013 I purchased all the necessary items, USB dongle, AVN card, and Toyota Techstream Professional level subscription, and it cost me around $300 because of this. This time I was curious if there was interest in sharing the cost of the dongle, and possibly the Techstream subscription. Everyone involved would have to purchase an "AVN" card, which is basically the license to update. Current cost of the AVN is $169 retail. I believe I found a place that will sell it for between 10 to 20 percent off, but you pay for shipping. If there is enough interest, it may be more economical for the group. (Currently the installation cost is $60 at the one dealership that I asked.) When I purchased the dongle last time, it cost me $90.94. It is available here: Bosch Automotive Service Solutions LLC Toyota | Tool Detail So that's: $169 for the required AVN card (if Retail prices prevail.) $90.94 USB Dongle(I honestly don't know if the prices have changed, but hopefully not. This included tax surprisingly.) $55 for the TIS Professional subscription. I believe people would be able to share the cost of the dongle and TIS subscription parts, but enough people would have to get involved to lower the net cost to each to be less than the $60 to $65 dealerships are charging to install the update, (about 1/2 hour labor time as I understand.) (I honestly believe this is a legal method of updating: The dealership has one dongle for the update, which it uses on all vehicles that are to be updated. The dealership uses it's TIS subscription to produce the installation code necessary to install the update. The dealerships will require each person to purchase an AVN card.) If anyone knows anything to the contrary, please feel free to advise. Thank you for reading my thread.