A file with a .part03.rar extension (or .part01.rar , .part02.rar , etc.) cannot be extracted on its own. To extract the content, you must:

Ensure you have downloaded all parts from the same source to avoid corruption errors.

Locate all related files ( .part01 , .part02 , .part03 , etc.) in the same folder.

If you are looking for a specific mod or software, it is recommended to download from trusted, official, or well-known forums (e.g., Nexus Mods, official game forums) to avoid malware.