If you're having trouble downloading from the official website, you can also try:
The most straightforward way to download BeamNG Drive is through its official website. Look for the "Download" section, where you can choose between different versions (if available) and operating systems. Beamng Drive 0.27 Download
If you specifically need to roll back or "downgrade" to version 0.27 (perhaps for compatibility with older mods), you can use the Steam Beta feature: BeamNG Drive 0