If you downloaded this from an untrusted site (like a random forum or pop-up), do not open it . Scan it immediately with VirusTotal . 2. How to Open "103.rar"
If prompted for a password, common defaults for tech archives are 1234 , mhhauto , or the name of the website where you found the link. 3. Usage Guide (For OBD2 Firmware 103) 103.rar
To access the files inside, you need a decompression utility: The official tool for .rar files. If you downloaded this from an untrusted site
If you get a "Checksum Error," the download was likely interrupted. Try downloading the file again using a download manager . How to Open "103
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.