Assetto Corsa Is Obsolete V1163 Is Required Fix [updated] 〈2024-2026〉

Disclaimer: This guide is based on common community fixes reported up to 2026. Always back up your changelog.txt file before editing. If you're still having trouble, let me know:

Corrupted or missing system files frequently trigger version mismatches. Steam can automatically scan and replace these broken files. Completely close and Steam . Relaunch Steam as an Administrator. Navigate to your Library and right-click Assetto Corsa . Select Properties , then click the Installed Files tab. Click Verify integrity of game files .

Windows permission restrictions can block Content Manager from reading the acs.exe version data. assetto corsa is obsolete v1163 is required fix

, or does the error prevent the game from starting entirely?

The reality

The room smelled of stale energy drinks and the faint, ozone-like scent of an overworked GPU. Elias sat before his triple-monitor setup, the centerpiece of his sim-rig glowing with the familiar, comforting menu of Assetto Corsa.

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.” Disclaimer: This guide is based on common community

This error appears deceptively simple but can be a nightmare to troubleshoot. It prevents you from joining online races, locks you out of leagues, and makes it seem like your game is permanently broken.

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Steam can automatically scan and replace these broken files

You launch Assetto Corsa, ready to race, but a frustrating error stops you:

Despite the error message’s harsh wording, In fact, five years after v1163 was released, AC has more active weekly players than many modern sims. The error is simply a legacy handshake protocol from 2018.