If you are trying to join a server or launch a specific mod and see the error don't panic. Your base game isn't broken; it's just a mismatch between your game version and the server or mod expectation.
This is the most common and effective solution reported by the community.
Ensure it points exactly to your main Steam directory (usually C:\Program Files (x86)\Steam\steamapps\common\assettocorsa ).
Assetto Corsa stopped receiving official development updates from Kunos Simulazioni years ago. The final official version of the game is . assetto corsa is obsolete v1163 is required fix hot
Assetto Corsa remains a beloved racing-simulation title with a dedicated modding community, but players sometimes encounter startup errors that block the game from launching. One common message is “Assetto Corsa is obsolete — v1163 is required,” which typically means the game client or one of its components is out of date relative to what a launcher, mod, or multiplayer service expects. This essay explains likely causes, step-by-step fixes, and preventive measures so players regain access quickly and avoid similar interruptions.
The default path is usually: C:\Program Files (x86)\Steam\steamapps\common\assettocorsa
You are running a legitimate Assetto Corsa v1.16.3, but something is interfering with the Steam API hook. This could be: If you are trying to join a server
Often, you are running a slightly newer or modded version (like v1.16.4 via CSP), but the server or CM's internal check is still specifically looking for the exact signature of v1.16.3 .
In , go to Settings > Content Manager > General . Look at the Assetto Corsa folder path at the top.
Delete the contents of this folder (do not delete the main folder itself). Restart Content Manager. Summary Troubleshooting Checklist Time Required Verify Steam Game Files 5–10 mins Step 2 Update Content Manager Step 3 Fix Root Folder Path Step 4 Launch Vanilla Steam Game Step 5 Clear AppData Cache Ensure it points exactly to your main Steam
it. CSP will often stop reporting the error if it cannot find the version number in that file. Update Content Manager & CSP Check for updates within Content Manager under Settings > Content Manager > General
Go to your Assetto Corsa root folder (usually C:\Program Files (x86)\Steam\steamapps\common\assettocorsa ). Look for a file named steam_appid.txt .
First, let’s decode the jargon. "v1163" refers to a specific build version of Assetto Corsa (version 1.16.3). This was the final official update released by Kunos Simulazioni before they shifted their full focus to Assetto Corsa Competizione .
Match multiplayer server or mod network requirements