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MTA:SA fix

CL35: GTA could not add a vehicle upgrade

Restart the PC and try the upgrade once more. If it fails again, note the vehicle ID and upgrade ID shown in the error.

The message

Trouble adding vehicle upgrade

Codes on this page: CL35

Steps

  1. Restart the PC and try the upgrade again

    Restart the PC, then do the same thing once more. If it fails, note the vehicle ID, upgrade ID and frame name shown.

    Source: MTA help

  2. Go back to the original GTA vehicle files

    Only if you installed vehicle replacements or changed other model files in your own game.

    Keep a copy of those mods, then repair GTA from your trusted game source. Try again after that.

    Source: MTA help

  3. Report it to that server

    If a clean installation still fails on that server, give its support team the vehicle, upgrade and frame details, so they can check that combination.

    Careful: No single setting on your side is known to fix every vehicle upgrade error.

    Source: MTA help

Still not fixed? Copy the whole message, not only the code, and check your log in the Fix tool. It is read on your own computer.

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Where this comes from

Official MTA guidance

Read on 7 September 2026 and written in our own words here.