Drag and drop BeamNG.Drive.v0.25.5.zip directly into the mods folder.
Ensure there is a folder named vehicles or levels at the top level. File: BeamNG.Drive.v0.25.5.zip ...
Open BeamNG.drive, go to the Repository , and click Open Mod Folder . Keep it Zipped: Do not extract the ZIP file. Drag and drop BeamNG
If the mod isn't showing up, the folder structure inside the ZIP might be wrong. Here is how to fix it: go to the Repository