If you are talking about the map database, you can buy an upgraded data DVD from the link below and insert it into the appropriate slot yourself. The cost is $191 plus tax.
The navigation system's supplemental instruction namual should have the details and illustrate the location. In some cars, there is a second DVD slot on the head unit. The Toyota Prius has its DVD slot under the driver's seat, where the brain of that Nav system lies.
Source: https://store.alpine-usa.com/Hondadvdsal...
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