: You will need a high-quality SD card (usually 16GB or 32GB).
: Use a tool like 7-Zip or WinRAR to extract the .7z file. You should see several files, typically including a .kwi or image file. Format the SD Card : Format your SD card to FAT32 . F3503022019.7z
: Ensure your car battery is healthy or connected to a charger. If the power cuts during a firmware write, the head unit may be permanently "bricked." : You will need a high-quality SD card
: Move the extracted files directly to the root directory of the SD card (not inside a folder). Installation : Turn your vehicle's ignition to ACC or On . Insert the SD card into the vehicle's map/data slot. Format the SD Card : Format your SD card to FAT32
If you are attempting to fix a "reboot loop" or update your vehicle's head unit, follow this general guide: