Use specialized software like HDD Raw Copy Tool or ImageUSB-tool to burn the downloaded .img file to your SD card.
After processing with tools like XorFiles, your final image should typically be around 121MB to fit properly.
If certain vehicles are suddenly "greyed out," a corrupt SD card is likely the culprit.
If your PC doesn't recognize the tool after a card swap, uninstall the "USB device" from Device Manager and reinstall the usbdevicedrv provided with your software.
Kess V2 SD Card Creation Guide | PDF | Computer File - Scribd
For those looking for a complete hardware refresh, you can find replacement parts and kits at retailers like AliExpress or VXDIAS .