This usually means part2 was not fully downloaded or the file size does not match the other parts in the set.
Compressed data for the racing game DiRT 4 , developed by Codemasters. Safety and Verification DiRT4.part2.rar
Multi-part archives are common vectors for bundled adware or malware. It is highly recommended to run this file through a service like VirusTotal before extraction. This usually means part2 was not fully downloaded
When dealing with split RAR files from third-party sources, it is important to verify their integrity: DiRT4.part2.rar