103.rar -

Copy your existing firmware folder within your diagnostic software directory (usually in C:\Program Files (x86)\... ).

Often used for "Double PCB" Delphi/Autocom VCI devices to update them to firmware version 103.

Sometimes used in modding communities (e.g., for specific game engine builds). 103.rar

Before opening "103.rar," it is critical to know what it is for, as generic filenames like this are common in niche tech circles:

If this file is for a car diagnostic tool (Delphi/Autocom), follow these general steps: Copy your existing firmware folder within your diagnostic

Extract the contents of "103.rar" and copy the files into the Firmware folder of your software.

If the file is just named "103" without ".rar," manually rename it by adding .rar to the end so your software recognizes it. Sometimes used in modding communities (e

If you get a "Checksum Error," the download was likely interrupted. Try downloading the file again using a download manager .