I have successfully installed North America Maps (unlocked) onto my Factory Garmin Honda GPS and all seems to be working fine so far .

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Parrottheadca Reviewed by Parrottheadca on 12th November 2023. 2017 Honda Accord I have successfully installed North America Maps (unlocked) onto my Factory Garmin Honda GPS and all seems to be working fine so far . Rating: 5

Hi,

Same car here. Could you explain how you got the unlocked maps to work?

I downloaded the latest files from the sticky thread (City Navigator North America NT 2025.10 FID 12328), renamed the gmapprom.img to gmapsupp.img, and added them to a FAT32 USB with my GarminDevice.xml on it. My USB looks like this:



I plugged the USB into my car, but got an error: "The map update on the USB storage device is not compatible with the device."

Do I have all the right files?