For the , you can use Fusion Overloader to install mods without downgrading your game version.

: Drag and drop your new .wft (model) and .wtd (texture) files to replace the existing ones. Pro-Tips for Stability

: Never use mods while attempting to play the online component, as this can result in a ban. Fixing GTA IV with 4 Mods (2026 Guide) - Steam Community

: Excellent for finding highly detailed vehicle models and technical tools like the CarColEditor for customizing paint jobs.

: A long-standing repository featuring a vast collection of cars and realistic traffic mods.