In late 2015, Kunos Simulazioni released v1.1.63. Quietly, they added a hidden telemetry handshake for a canceled partnership with a major Italian tire manufacturer. When that deal died, they deprecated the handshake in v1.2. However, modders preserved it as a secret “pro physics” flag.
Why? Because v1.1.63 allowed asymmetric tire heating, dynamic brake duct simulation, and chassis flex on open-top cars—features later versions neutered for console compatibility. Today, if a mod has .dds textures with the metadata Pirelli_2015 or uses the encrypted tyres_v1163.ini, your modern v1.16.4 Assetto Corsa will scream “OBSOLETE.”
Reinstall Assetto Corsa through Steam. Once finished, do not launch the game immediately. assetto corsa is obsolete v1163 is required fix
Mods can sometimes cause compatibility issues or make the game appear as if it's an older version.
Since its release, Assetto Corsa has remained a benchmark for simulation realism and modding flexibility. However, the software lifecycle—combined with evolving community standards, third-party mod dependencies, and online platform requirements—has rendered many existing installations functionally obsolete. Specifically, version 1163 is no longer optional; it is a mandatory baseline for stability, compatibility, and feature parity. In late 2015, Kunos Simulazioni released v1
This is the step 90% of guides miss. If you have ever installed a cracked mod or a ‘no-CD’ patch, your steam_api.dll is broken.
(Note: where precise version-diff details are not publicly documented, this section describes likely categories of changes that commonly justify requiring a specific build.) Since its release, Assetto Corsa has remained a
The Error: Assetto Corsa is obsolete. Version 1163 required.
The Feeling: You just downloaded a legendary 1967 Le Mans mod, a secret Porsche 917K physics overhaul, or a laser-scanned vintage Targa Florio track. You click “Drive.” The screen flashes red. The simulation refuses to start. You are stuck in the pits of obsolescence.
Here’s the secret Kunos won’t tell you: v1163 is not a version number. It’s a handshake.
If you've tried all the above steps and still face issues, consider contacting the support team for your platform or the game's developer, Kunos Simulazioni.