At its core, this error indicates a between Assetto Corsa's game version and the version your modding tools expect. When you see this message, typically in Content Manager, it doesn't mean your game is broken—it simply means CSP doesn't recognize your current Assetto Corsa version.
Save a copy of the verified DLL on your desktop. When a mod inevitably overwrites it, simply copy it back.
Seek community/server guidance
If you previously installed certain mods, custom career modes, or no-CD patches, your acs.exe file might have been overwritten with an older version. Ensure you are running the official Steam executable. If verification in Step 1 did not fix it, manually delete acs.exe and AssettoCorsa.exe from your root folder, then run the Steam verification process again to force a clean download of the v1.16.3 executables. To help me narrow down the exact issue, let me know: Are you using the or a different launcher? assetto corsa is obsolete v1163 is required fix hot
An outdated version of Content Manager might struggle to read newer Steam file structures.
This is a community-made, comprehensive mod that almost every modern Assetto Corsa player uses. It massively overhauls the graphics, physics, and weather, and is essential for running many of the game's most popular car and track mods. It is managed through a separate launcher called .
If you ever encounter persistent, unexplained crashes or errors, a good first step is to verify the integrity of your game files through Steam. At its core, this error indicates a between
When a modder creates a car, they pack it using a specific version of the Kunos editor or a third-party tool (like CSP's extended physics). If the modder packed the car using the "v1163" signature, your game report to Windows that it is running exactly that version.
The irony? Your game is actually for CSP to handle. Many players panic when they see this message and assume they need to downgrade their game to 1.16.3, which is a common reaction seen in community forums: "However, after I checked the log file, my AC version is v1.16.4 which is a more updated version than v1.16.3, should I need to downgrade it to 1.16.3 to make it works?"
Some modders hard-code the "obsolete" check into the car's data.acd file. You can force the game to ignore this. When a mod inevitably overwrites it, simply copy it back
Content Manager relies on configuration files generated by the official launcher. If these files are missing or outdated, Content Manager triggers the obsolete error. Close Content Manager.
Because the game version in the files is higher than what the mod expects, the software incorrectly flags it as "obsolete". ⚡ Quick Fixes
Once you complete these steps, your game will report the correct version, and you can join any server requiring v1.163.
Here is the step-by-step guide to fixing this error quickly. 🛠️ Step 1: Verify Game Files on Steam