This naming convention is common for automotive software (like ECU tuning files) or mobile firmware. Knowing the device or software name would allow me to search for the specific repository it belongs to.
If you have part 1 and need part 2 to extract the files, you generally need to download it from the exact same location where you found the first piece. ADBPPH2021V2211138MPEA.part1.rar
To help you find exactly what you need, could you clarify a few details? This naming convention is common for automotive software
Because this file name is highly specific and likely part of a larger multi-volume set (e.g., .part2.rar , .part3.rar ), the "piece" you are looking for is likely the or the decryption password . To help you find exactly what you need,
(e.g., a specific forum, a file-sharing site like Mega/Mediafire, or a technical support portal).
