A server requires a specific CSP version that your system is misinterpreting as a base game version error. How to Fix the Error (Step-by-Step) Follow these solutions in order to resolve the issue. 1. Force Steam to Update Assetto Corsa
The error message typically indicates a version mismatch between the client (the user's game) and the server or content manager.
The most common trigger for this error is a minor update to the core Assetto Corsa game files, often distributed via Steam. For example, a common scenario is when the base game is updated to version 1.16.4 . Since the last version CSP officially recognized was 1.16.3 , it flags the newer version as "obsolete" from its perspective. This confusion is further compounded by the fact that Content Manager (CM) might still correctly identify your game's actual version, leading to the "conflicting messages" that many users have noted in community forums.
If you’ve spent any time downloading custom cars or tracks for Assetto Corsa , you’ve likely run into a frustrating popup: Or a similar variant: “Car/Track requires game version 1.16.3.” assetto corsa is obsolete v1163 is required link
Locate the file named inside the root directory.
The error message is slightly misleading. It does not mean your base game is outdated if you bought it on Steam. It usually indicates a mismatch between your Content Manager launcher, your CSP (Custom Shaders Patch) version, or a corrupted game file registry.
The following steps should be performed in order to resolve the issue: A server requires a specific CSP version that
How to Fix the "Assetto Corsa is Obsolete: v1.16.3 is Required" Error
If the user owns the game on Steam and needs to downgrade to 1.16.3 to play on a specific server:
If you are trying to join a server that requires rain physics, you may need the Patreon-exclusive of CSP. Ensure your Patreon account is linked in Content Manager to see these versions. 3. Verify Assetto Corsa Game Files on Steam Force Steam to Update Assetto Corsa The error
Click on the latest or Tested version to force an update.
Alternatively, as suggested by Steam Community users, try to re-install or re-apply the CSP within Content Manager. Important Tips for 2026 Modding