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Follow the on-screen prompts to begin the "System Update" or "Software Reinstallation."

: 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."

: 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 .

: Verify the file source. Using the wrong firmware version for your specific model (e.g., trying to put a Toyota 13CY update on a 15CY system) can cause hardware failure.

F3503022019.7z Today

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