You need Assetto Corsa v1.16.3 to run whatever mod or server requires it; this guide shows how to check your version, update safely, fix common update errors, and ensure mods/servers work with v1.16.3.
Assetto Corsa’s latest official version is 1.16.3 (released by Kunos Simulazioni).
If a mod, car, track, or online server checks your game version and finds anything lower (e.g., 1.16.0, 1.15), or if your executable is modified/cracked/outdated, you will see a variation of:
“Assetto Corsa is obsolete. Version 1.16.3 is required.”
This is not a bug — it’s a version check built into some mods (especially via acStable function in custom shaders or server checks).
First, a brief history lesson. Assetto Corsa was developed by Kunos Simulazioni. The final major update for the base game was version 1.16.3, released in late 2018 / early 2019. Since then, Kunos has moved on to Assetto Corsa Competizione (ACC) and the upcoming Assetto Corsa 2.
However, the modding community has not moved on. In fact, the game is more alive now than ever, thanks to Custom Shaders Patch (CSP) and Content Manager (CM) . These third-party tools have extended the game’s life far beyond version 1.16.3.
The error you are seeing originates from a protective feature within some high-end mods (often encrypted mods from professional creators like RSS, VRC, or URD). These mods contain a script that checks the game’s version number. If the reported version does not exactly match v1.16.3, the mod refuses to work.
The error is correct and protective — it prevents mods/servers from running on an unsupported or outdated game version.
For legitimate users: a simple Steam file verification fixes it 99% of the time.
For pirates: it’s a clear sign to buy the game, as mod compatibility will only get worse with time.
If you still get the error after verifying files and running the stock game (no mods) without issue, then the problematic mod itself may be poorly coded — check its forum page for a patch.
The year is 2026. The racing world has moved on. Assetto Corsa 2 has been out for eighteen months, and Kunos Simulazioni has long since stopped supporting the original game. Online leaderboards are ghost towns. Modding forums are filled with broken links. Most people have uninstalled it.
But not Leo.
Leo is a preservationist. He runs a small, obsessive server called "Legacy Shift: 1.16.3 Only." No graphics mods. No post-processing filters. No custom shaders. Just pure, unpatched Assetto Corsa — version 1.16.3, the final, definitive build before Kunos abandoned it.
Tonight, he’s trying to onboard a new driver: a hotshot e-sports rookie named Mika who keeps complaining that her Assetto Corsa won’t connect.
Mika (discord DM, 11:47 PM): “it says ‘assetto corsa is obsolete v1.16.3 is required’ — fix?”
Leo sighs. He’s seen this a hundred times. Steam auto-updated her game to a later "final" patch that broke more than it fixed. The 1.16.3 requirement isn’t just a version number — it’s a key. Without it, the server’s handshake protocol fails. No cars load. No laps count.
He types back slowly, each instruction precise as a pit board:
Leo: “You need to roll back. Go to Steam console. Download depot 244210, manifest 8374291590385621431. That’s the only way.”
Mika fumbles through it. Thirty minutes pass. Leo watches the server lobby — empty, as always. He refreshes. Refreshes again.
Then, a flicker.
Mika has joined the server.
Her car spawns — a bone-stock Mazda MX-5 on street tires. No assists. No ABS. Leo grins, selects his own MX-5, and pulls out of the pits onto a rain-slicked Magione.
They run ten silent laps. No voice chat. No text. Just the rhythm of tire squeal and engine note — the real physics, untainted by later updates that nerfed the clutch simulation and softened the FFB.
After the final lap, Mika sends one last message:
Mika: “Okay. I get it now. 1.16.3 is not obsolete. Everything after is.”
Leo leans back, the server log glowing softly in the dark. assetto corsa is obsolete v1.16.3 is required fix
Assetto Corsa v1.16.3 — Required. Fixed.
Here’s a punchy, narrative-style write-up for your Assetto Corsa situation:
Title: “Obsolete, They Said. v1.16.3 Required, They Said.”
You’ve just downloaded that shiny new mod—laser-scanned mountain pass, screaming turbo, wet-dry transition, the works. You drop it into content/cars, fire up Assetto Corsa, and… silence. Or worse: a crash. Then the red text of doom appears:
“CAR IS OBSOLETE – V1.16.3 IS REQUIRED”
Wait. Obsolete? Since when?
Here’s the truth Kuno’s update log won’t tell you: v1.16.3 is the silent hero of Assetto Corsa’s modding golden age. It’s not about physics tweaks or UI polish. It’s about compatibility. That version introduced crucial extended physics hooks, digital instrument panel support, custom shaders patch handshakes, and the backbone for 90% of modern mods you actually want to drive.
So when you see that error, the mod isn’t calling you obsolete. It’s calling your game version a fossil.
The Fix (that feels like forbidden magic):
You don’t need to reinstall. You don’t need to crack anything. Just open steamapps/common/assettocorsa/system/data/ and check your acversion.txt. If it doesn’t say 1.16.3, Steam probably auto-updated you past it (yes, past a required version—welcome to PC racing). Downgrade via Steam’s betas tab or use Content Manager’s version override. Then watch that angry red warning turn into a purring engine.
The bottom line:
Assetto Corsa isn’t obsolete. Your install just forgot it’s still the king of sim modding. Give it v1.16.3, and it’ll run mods from 2024 like they were born there.
Moral of the story:
Don’t let a version check end your hotlap. One number stands between you and tire smoke at 200 km/h.
Fix it. Then send it.
Want a shorter version for Discord or a forum signature?
Troubleshooting: "Assetto Corsa is Obsolete V1.16.3 is Required" Fix
If you are seeing the error message "Assetto Corsa is obsolete (v1.16.3 is required)" while using Content Manager (CM) or Custom Shaders Patch (CSP), you aren't alone. This common technical hiccup often occurs when there is a mismatch between the game's actual version and what Content Manager expects to see.
Below is a comprehensive guide to understanding why this happens and how to fix it quickly. Why Does This Error Occur? The error typically stems from one of three scenarios:
Minor Game Updates: Assetto Corsa sometimes receives very small updates from Kunos. These updates might move the version number slightly (e.g., to v1.16.4), which confuses older versions of Content Manager that specifically look for "v1.16.3".
Mod Compatibility: Powerful mods like Custom Shaders Patch (CSP) require a specific 64-bit version of the game (v1.16.3) to function. If you are accidentally running the 32-bit version, CSP may fail to "infiltrate" the process and throw this error.
Cached Config Errors: Sometimes the local configuration data for Content Manager becomes corrupted, leading it to report the base game as obsolete even when it is fully updated on Steam. How to Fix the "Obsolete" Error 1. The "Quick Edit" Fix (Most Effective)
If your game is actually up to date (v1.16.4) but Content Manager is complaining, you can manually trick the software by editing a simple text file.
Navigate to your Assetto Corsa root directory (usually found at C:\Program Files (x86)\Steam\steamapps\common\assettocorsa). Locate the file named changelog.txt.
Open it with Notepad and find the very first line (the latest version number). Change the version number to 1.16.3 and save the file. Restart Content Manager. 2. Disable "Force 32-bit" Mode
Many modern mods require the 64-bit executable to run properly. If this setting is enabled, you may see "version required" errors. In Content Manager, go to Settings > Assetto Corsa > Video. Ensure the "Force 32-bit" checkbox is unchecked. 3. Verify Steam Game Integrity
If files are missing or corrupted, Steam can automatically repair them. Open your Steam Library. Right-click on Assetto Corsa and select Properties. Go to the Installed Files (or Local Files) tab. Click Verify integrity of game files. Quick summary You need Assetto Corsa v1
Note: If you used unofficial methods to unlock DLCs, verifying files will likely remove them. 4. Reset Content Manager Data
If the error persists, you may need to clear CM's temporary data.
Type %localappdata% into your Windows Search bar and hit Enter. Find the folder named AcTools Content Manager.
Rename it to something like AcTools Content Manager_Backup (this keeps your settings safe).
Restart Content Manager. It will act as a fresh install; if the error is gone, you can gradually move your old settings back. Summary Checklist Why it works 1 Edit changelog.txt to "1.16.3" Bypasses version-check mismatch. 2 Use 64-bit executable Required for CSP and modern mods. 3 Run via Steam once Triggers necessary first-time setups.
If you've followed these steps and still can't get into the driver's seat, double-check that your Nvidia or AMD drivers are updated, as outdated GPU software can sometimes cause the "Race Cancelled" or "Obsolete" screen to trigger prematurely.
If you tell me which fix you've already tried or if you're using a specific mod pack like SRP, I can give you more targeted advice to get you back on track. Installed Custom Shaders Patch is obsolete - OverTake.gg
Always keep Steam, Assetto Corsa, Content Manager, and commonly used mods up to date. When joining multiplayer, check the server’s required game/build and mod list before connecting. Back up custom content so you can test with a clean install quickly.
If you want, tell me whether this happens at single‑player, when joining a specific server, or immediately at launch and I’ll provide the exact files/logs to check next.
Troubleshooting " Assetto Corsa is Obsolete (v1.16.3 Required)" The error message Assetto Corsa is obsolete (v1.16.3 is required)"
is a common false-positive issue primarily encountered by users of the Content Manager (CM) launcher or Custom Shaders Patch (CSP)
. Paradoxically, this error often occurs because the game has been updated to a version
than 1.16.3 (typically v1.16.4), which the mod tools do not yet recognize. Primary Cause: Version Misalignment
When Kunos Simulazioni released minor updates (such as the Ferrari Esports event update), the version number jumped to . Because many versions of CSP were hard-coded to look for
as the "latest" valid version, the patch fails to recognize the new files and flags the installation as outdated. Proven Fixes
The most effective way to resolve this is to manually spoof the version number so that the modding tools recognize the installation. Modify the Changelog File (Recommended) Navigate to your Assetto Corsa root installation folder (usually SteamLibrary\steamapps\common\assettocorsa Locate the file named changelog.txt
Open it with Notepad and find the very top entry, which likely says Change this value to and save the file.
Restart Content Manager; the "obsolete" warning should disappear. Alternative File Management
If editing the text doesn't work, some users have success by changelog.txt changelog.txt.bak
or deleting it entirely, forcing the launcher to bypass the version check. Update Mod Tools In Content Manager, go to Custom Shaders Patch About & Updates Try installing the latest "Recommended" or "Preview" version of CSP
. Newer versions of the patch often include fixes for the v1.16.4 detection issue. Secondary Troubleshooting If the version spoofing does not allow you to launch races: Verify Game Files Steam "Verify integrity of game files" tool to ensure no core assets are corrupted. Check Root Folder Name : Ensure your Assetto Corsa folder path does not contain non-western or special characters , as this can confuse Content Manager's file pathing. Clean Reinstall : If all else fails, users from Steam Community forums suggest a full clean reinstall of the game to reset the environment. before attempting a clean reinstall? AI responses may include mistakes. Learn more
The error message " Assetto Corsa is obsolete (v1.16.3 is required)" is a common issue encountered by players using Content Manager (CM) and Custom Shaders Patch (CSP). It typically occurs because a minor game update (to v1.16.4) changed the version number in the game files, which older versions of CSP do not recognize as valid. Quick Fix: Edit the Changelog
The most direct solution is to trick Content Manager into thinking your game version is exactly what it expects by editing a text file.
Navigate to your Assetto Corsa root directory (usually found at SteamLibrary\steamapps\common\assettocorsa). Locate the file named changelog.txt. Open it with Notepad or any text editor. “Assetto Corsa is obsolete
Find the very first line (the latest version entry). It likely says v1.16.4. Change that number to 1.16.3 and save the file. Restart Content Manager.
For a visual walkthrough on resolving this and other common Custom Shaders Patch errors, watch this guide:
To fix the " Assetto Corsa is obsolete (v1.16.3 is required)" error, you usually don't need to actually update the game. This message often appears because the Custom Shaders Patch (CSP) or Content Manager (CM) cannot properly read your game's version file. Draft Post for Community/Support
Title: [FIX] Assetto Corsa Error: "Game is obsolete (v1.16.3 is required)"
Issue:When launching Assetto Corsa through Content Manager or trying to install/update Custom Shaders Patch, an error appears stating: "Errors: Assetto Corsa is obsolete (v1.16.3 is required)." This occurs even if Steam shows the game is fully updated to v1.16.4.
The Solution:The error is typically a version-check mismatch where CSP/CM is looking for a specific text string in your local files. Modify changelog.txt:
Go to your Assetto Corsa root installation folder (e.g., SteamLibrary\steamapps\common\assettocorsa). Find the file named changelog.txt.
Open it with Notepad, find the very first line (the latest version number), and change it to 1.16.3 if it says 1.16.4. Save the file and restart Content Manager. Verify Game Files:
If the above doesn't work, right-click Assetto Corsa in your Steam Library, go to Properties > Installed Files, and select Verify integrity of game files. Manual CSP Reinstall:
Sometimes the CSP installation becomes corrupted. Try manually installing a different version of CSP (like 0.1.79 or the latest recommended) through the Settings > Custom Shaders Patch > About & Updates menu in Content Manager. Quick Fix Steps (for you)
The Text File Trick: Open assettocorsa/changelog.txt and change the top version number to 1.16.3. This is the most common "quick fix" that tricks the mod into thinking the version matches.
Update Content Manager: Ensure you are using the latest version of Content Manager to ensure compatibility with newer CSP builds. If you'd like, I can help you:
Find the exact folder path if you aren't sure where Steam installed it.
Draft a different version of this post for a specific site like Reddit or Overtake.gg. Troubleshoot if changing the changelog.txt didn't work.
This is the most likely fix for 90% of users.
Now try loading the problematic car mod again. It should work.
If you are a sim racer who enjoys modding Assetto Corsa to its absolute limits, you have likely encountered a frustrating roadblock. You download a high-quality car mod from a Patreon or a well-known modding website, follow the installation steps meticulously, and then—error.
A stark message appears in your Content Manager or on the race loading screen:
“ASSETTO CORSA IS OBSOLETE. V1.16.3 IS REQUIRED”
Your heart sinks. Your brand new Formula Hybrid or RSS GT car refuses to load. Panic sets in. Is your game truly obsolete? Do you have to buy a new copy? Is the mod broken?
Let’s clear the air immediately. Your game is not obsolete. Assetto Corsa reached its final official version (v1.16.3) years ago. If you own the game on Steam, you already have this version. The error message is misleading. It does not mean your game is outdated; it means the mod you are trying to use has a security or compatibility check that is being triggered by a mismatch between what the mod expects and what your game reports.
This article will explain exactly why this error happens, and—most importantly—provide a step-by-step guide to fixing it permanently.
For many sim racers, firing up Assetto Corsa is the start of an immersive experience. However, this routine can be abruptly halted by a jarring notification: "Assetto Corsa is obsolete. v1.16.3 is required."
This error message is one of the most common hurdles for new players or those returning to the game after a fresh install. While the phrasing suggests the game is broken or outdated, the solution is straightforward. This essay explores why this error occurs and provides a step-by-step guide to fixing it so you can get back on the track.
Try these advanced steps:
assettocorsa.exe from a trusted friend’s Steam copy (legal only if you own the game).C:\Program Files (x86)\Steam\steamapps\common\assettocorsa).