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Technical Truck Customization

“Save Editing” (frequently referred to as Local Modding) is a sophisticated technique utilized by simulation enthusiasts to customize vehicles beyond the standard constraints of the in-game upgrade shops. This method enables you to architect “hybrid” trucks - such as a Scania chassis using a high-torque Volvo engine - or modify trailer weights and axle configurations. In the dedicated convoy environment, these modifications are generally stable and visible to all participants, provided they use assets that already exist within the shared data manifests.

Difficulty

Intermediate

Time

5 Minutes

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Technical Tool Preparation

The primary game database files (.sii) use a binary encryption that prevents direct text editing. You must first decrypt these files using community-validated technical utilities.
1

Acquire Decryption Utilities

Download a reputable decryption tool such as SII_Decrypt.
2

Locate Your Profile Data

Navigate to your local game directory: Documents/Euro Truck Simulator 2/profiles/[ProfileID]/save/quicksave/.
3

Initialize Decryption

Drag your game.sii file onto the decrypter executable. The file will transition to a plain-text format that can be parsed by any technical editor (e.g., Notepad++).

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Executing Strategic Edits

Once the file is human-readable, you can search for and modify specific mechanical parameters.
Locate the engine or gearbox data paths. You can replace the technical string of your current part with the path of a part from a different manufacturer (e.g., swapping a Renault engine for a Scania DC16 engine) to improve performance or alter the audio profile of your truck.

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Need Extra Help?

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Last Updated: January 2026 | ETS2: Save data tuned.