Question about Garmin nuvi 200W GPS Receiver

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My maps on my Garmin Nuvi 205w GPs device are lock and I can't use it hoe do I unlock the maps to use my device again?

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If you are getting the message “Can't unlock maps, your unit will not function without maps” on your Garmin device, there is an issue with the mapping on your device.
Please follow the steps below to restore the mapping:

  1. Go to and log into myGarmin account. (If you haven't already registered your satnav you'll need to in order to log in)
  2. Select myMaps
  3. Click Manage Maps and Downloads
  4. Below the appropriate device, select the "Details" link
  5. Look for the Unlock Code listed on this page
  6. Copy all the unlock codes for your device
  7. Close your internet browser
  8. Right click on your desktop
  9. Click new, and then click Text Document
  10. Click on the newly created Text Document icon from the desktop
  11. Type your unlock codes into the document
  12. Click File and Save as
  13. Change the file name to gmapprom.unl
  14. Change the “Save as type” to "All files"
  15. Close the document you should see the file gmapprom.unl on your desktop)
  16. Right click on the gmapprom.unl file and then click copy
  17. Connect your Garmin device to your computer and click Computer/My Computer
  18. Click on the 'nüvi (drive letter:)'2
  19. Right click on the Garmin folder and click paste (see next line for nuvi 1xxx series)
  20. For nuvi 1xxx series devices, the gmapprom.unl file is required in the ".System", "Garmin" folder which is a hidden system folder. In order for you to see the hidden system folder:
    • For XP:
      1. In MyComputer go to the Tools menu and choose Folder Options...
      2. Select the View tab
      3. Select the radio button next to "Show hidden files and folders"
      4. Uncheck the box next to "Hide protected operating system files (Recommended)"
      5. Click OK
    • On Vista:
      1. In the Computer window go to the Organize menu and choose "Folder and search options"
      2. Select the View tab
      3. Select the radio button next to "Show hidden files, folders, or drives"
      4. Uncheck the box next to "Hide protected operating system files (Recommended)"
      5. Click Ok
Safely disconnect your Garmin device from the computer to complete the process. If you are having any issues duplicating the steps above or are still receiving the message "Can't unlock maps, your unit will not function without maps” please contact Product Support.
1 The device must be registered to view the Unlock Code.
2 In My Computer, some units may be labeled 'garmin (drive letter:)'.

Posted on Aug 04, 2010


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Next, please tell me what year of map you have on your unit, 2009, 2010, etc.

Them, email me your units internal serial number. Its a 10 digit number (not the number on the outside). The number starts with a "3" and can be found by pressing the tools button, then system and then "about".

Please email me at sharcnet-usa AT sharc DOT NET

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