Ensure you have all DLC (essential for mod compatibility). Install Content Manager: Replace the stock launcher.
If a core game file was accidentally deleted or overwritten by a mod, Steam needs to replace it. Open your . Right-click Assetto Corsa and select Properties . Navigate to the Installed Files tab. Click Verify integrity of game files .
: The internal changelog.txt file in your root game directory can become corrupted or misaligned during a patch, causing Content Manager to read an inaccurate version number. Step-by-Step Fixes for the Version Error Fix 1: Edit the Changelog.txt File (Fastest Method)
If you are trying to join a multiplayer server or install a new mod in Assetto Corsa, encountering an error message stating that your game is "obsolete" and that "v1.16.3 is required" can be incredibly frustrating. This specific version number—v1.16.3—is the final official stable release of Assetto Corsa by Kunos Simulazioni.
Even if you just purchased the game on Steam, your actual game executable ( acs.exe ) might be running an older version, or the mods you downloaded are looking for a newer base version than the one currently registered in your system. 🛠️ How to Fix the "Obsolete" Error assetto corsa is obsolete v1.16.3 is required
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Look for the or "Force v1.16.3 version" checkbox (the exact wording varies by CM build).
Sometimes Content Manager loses track of the actual acs.exe path.
Older tutorials suggested renaming ContentManager.exe to AssettoCorsa.exe to trick Steam. This is no longer necessary and causes version check loops. Ensure you have all DLC (essential for mod compatibility)
Navigate to your root Assetto Corsa folder (usually Steamapps\common\assettocorsa ). Check if a file named steam_appid.txt exists.
Look at the top right corner for a green circle or notification icon. Click it to check for updates.
If you see a message saying Assetto Corsa is obsolete and requires version 1.16.3, it means your game installation version is older than what a server, mod, or tool expects. This guide walks through causes and fixes for Windows PC (Steam) installations.
The "obsolete" message is typically a communication error between Content Manager and the game files rather than an actual version conflict. It often arises from: Open your
Ensure your game version is manually set or detected as 1.16.3 . 5. Check for Piracy Issues
Content Manager loses its connection to your running Steam client, preventing it from verifying your game version. Step-by-Step Fixes Follow these solutions in order to resolve the issue. 1. Toggle the "Suppress Version Check" Setting
If you’ve encountered the error message while trying to launch a race, you aren't alone. This specific error typically surfaces within Content Manager (CM) , the popular third-party launcher for Assetto Corsa, when it detects a version mismatch between your game files and what it expects for modern mods and shaders. Why This Error Occurs
For those using a vast library of older mod cars, this can solve the acs.pdb related crashes that often accompany the error message.
