Assetto Corsa Is Obsolete V1163 Is Required Fix //top\\ May 2026

The error message Assetto Corsa is obsolete (v1.16.3 is required)"

Some community members have found that the acs.pdb file is the specific culprit for versioning errors. assetto corsa is obsolete v1163 is required fix

Modded leagues like ACFL (Formula 1 mods) or old SRS plugins sometimes use custom anti-cheat DLLs that specifically look for a hex-edit hash of acs.exe . If you have a legitimate v1.16.3 but the anti-cheat expects a modified one, you get the obsolete error. The error message Assetto Corsa is obsolete (v1

Step 4: The DLL Swap (Nuclear Option)

If the mod still refuses, download the “acs1163_compat.dll” (search GitHub – look for user “@kunos_retro”). Place it in the mod’s extension folder. This DLL intercepts the version check and replies: “Yes, commander. This is a 2015-spec AC.” Open Content Manager

  1. Open Content Manager.
  2. Look at the top right corner. You will likely see a warning icon or a message regarding the game version.
  3. Navigate to the "Custom Shaders Patch" tab on the left sidebar.
  4. If your CSP is outdated, update it to the newest version available (Newer versions support the latest Steam files).
  5. Crucial Step: If updating CSP doesn't solve it immediately, you may need to install the "Legacy" version of the executable. In Content Manager, go to Settings > Content Manager > General and ensure "Use 32-bit executable" is unchecked if you are on a modern system, or check for a prompt that says "Update Assetto Corsa" in the main CM window which will fetch the necessary v1163 compatibility files.

Reinstall Content Manager:

If the software is persistently failing to recognize the game version, deleting the Content Manager.exe and downloading a fresh copy can sometimes reset the detection logic.

The error message Assetto Corsa is obsolete (v1.16.3 is required)"

Some community members have found that the acs.pdb file is the specific culprit for versioning errors.

Modded leagues like ACFL (Formula 1 mods) or old SRS plugins sometimes use custom anti-cheat DLLs that specifically look for a hex-edit hash of acs.exe . If you have a legitimate v1.16.3 but the anti-cheat expects a modified one, you get the obsolete error.

Step 4: The DLL Swap (Nuclear Option)

If the mod still refuses, download the “acs1163_compat.dll” (search GitHub – look for user “@kunos_retro”). Place it in the mod’s extension folder. This DLL intercepts the version check and replies: “Yes, commander. This is a 2015-spec AC.”

  1. Open Content Manager.
  2. Look at the top right corner. You will likely see a warning icon or a message regarding the game version.
  3. Navigate to the "Custom Shaders Patch" tab on the left sidebar.
  4. If your CSP is outdated, update it to the newest version available (Newer versions support the latest Steam files).
  5. Crucial Step: If updating CSP doesn't solve it immediately, you may need to install the "Legacy" version of the executable. In Content Manager, go to Settings > Content Manager > General and ensure "Use 32-bit executable" is unchecked if you are on a modern system, or check for a prompt that says "Update Assetto Corsa" in the main CM window which will fetch the necessary v1163 compatibility files.

Reinstall Content Manager:

If the software is persistently failing to recognize the game version, deleting the Content Manager.exe and downloading a fresh copy can sometimes reset the detection logic.