The final official release for the RNS 315 is V12 (2020-2021) . No newer official versions have been released, and some manufacturers have discontinued support.
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Once an official SD card is used to update a unit, it "locks" to that specific vehicle and cannot be used to update another car. The Truth About "Repack" Downloads The final official release for the RNS 315
or connect a stable power supply to prevent the unit from shutting down during the 2-hour process. Insert the SD card into the slot. When prompted, select "Assign" and then "Install" . select "Assign" and then "Install" .