I bought a used Leaf two weeks ago from a dealer. From the dash computer, I saw the previous owner&#x27;s CarWings username and password, as well as his address book, Bluetooth details, and lots of other history. I called Nissan to register the car with the Owner&#x27;s portal (<a href="https:&#x2F;&#x2F;owners.nissanusa.com" rel="nofollow">https:&#x2F;&#x2F;owners.nissanusa.com</a>) and remember being surprised that I didn&#x27;t have to give Nissan anything that proved I owned the car.