• Tested on Volkswagen Passat B7 w/ RNS315
• (might work on other non-VW cars?)
• Built from Linux sources / Compiled for amd64
• Should also work on Skoda/Seat/Audi with similar navs

This is a tool that lets you turn Generic SD Card/Samsung EVO card to be recognized by the RNS as a Map Update card. You must start with a FAT32 card, containing the navpsf_update folder

• Working on Linux 4+ compatible systems
• Tested on openSUSE Thumbleweed and Ubuntu LTS

$ git clone https://github.com/TudorGruian/vw_mmc-tools.git
$ cd vw_mmc-tools
$ chmod +x mmc
# and after that you can use ./mmc command, you have to read forums depending on your nav system.

Steps: Extract the content and copy on the SD, top folder is navpsf_update Look under /dev to see which SD is yours, in my case it is mmcblk0

Change the CID with the attached tool sudo ./mmc prog_cid /dev/mmcblk0 5d53424c32424d31013917ca53010400 remove the card and reinsert it

Now lock the card by password, it's not possible to unlock it with normal MMC driver, you need a patched version of kernel to be able to unlock it. Password you know from command below. sudo ./mmc lock_sd /dev/mmcblk0 C99A20843ED7D90B6801E49F2BC80277

Enjoy your new maps!