After you log in, tap the circled i at the top right of the screen. Scroll to the bottom of the Vehicle Information screen and tap Manage Vehicles. Tap the blue down arrow to the right of your VIN to open the info screen. Scroll to the bottom and tap Edit Vehicle. Tap the Nickname field and go wild!The nickname our car has is the VIN, and I want to be able to change it but can't seem to figure out how to do that.