2 Answers

If you would like to update the maps on your nüvi you will need to make sure that the nüvi is registered in a myGarmin account.

If you have not yet registered your nüvi:
Go to https://my.garmin.com/mygarmin/createNewAccount.faces
Follow the instructions onscreen to register.
After you have created an account please do the following:
Click Register
Select the type of Garmin product you are registering i.e. Garmin Device or Accessory
Type in the serial number
Download the Garmin Communicator Plug In
Follow the instructions onscreen to register.
To check for map updates after you have registered:
Go to https://my.garmin.com/mygarmin/customers/myGarminHome.faces
Sign in with your username and password
Click Manage Maps and Downloads
Click Update Available if there is an available update for your device
Select the Download or DVD option*
Click Add to Cart
Click Checkout
Follow the instructions onscreen to purchase the map update.

Go to Garmin's website (you may need to create a dashboard account) >> http://www8.garmin.com/support/download.jsp