Nddn W56 76031 Software Map Disc21

The is a 2-DIN Toyota Genuine DVD Navigation and Audio unit. The "Map Disc 21" (specifically the loading.kwi file) is primarily used to restore the unit's software after a power loss, such as a battery replacement. Core Features of NDDN-W56 (76031)

If nddn w56 76031 software map disc21 refers to a software product key, here's a general post: nddn w56 76031 software map disc21