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Tesla has released a new video on its official Instagram account demonstrating the effectiveness of the HEPA cabin air filtration system on the Tesla Model Y.
In the video, a Tesla Model Y is placed inside a sealed, transparent plastic enclosure designed to simulate an extreme air pollution scenario. The setup is completely air-tight, allowing Tesla to control the air quality inside the enclosure. A BMW SUV is parked alongside the Model Y inside the same enclosure for comparison.
To recreate hazardous air conditions, the Tesla team filled the enclosure with thick red smoke, simulating severe pollution. Within moments, the enclosure was completely filled with smoke, significantly reducing visibility.
What happens when bioweapon defense mode is activated?
The Model Y is equipped with Tesla’s Bioweapon Defense mode, designed to filter incoming air before it enters the cabin. When the feature is activated, the video shows that red smoke continues to fill the enclosure, but it does not enter the cabin of the Model Y. In contrast, smoke is seen entering the cabin of a BMW SUV parked nearby.
According to Tesla, all air entering the Model Y cabin is sent through a large HEPA filtration system. The company claims that the filter is capable of removing 99.97% of airborne particles as small as 0.3 micrometers. At the end of the demonstration, Tesla shows the HEPA filter used in the test, which appears clearly saturated with red smoke particles, indicating that contaminants were captured before they reached the cabin.
How does the Model Y’s bioweapon defense mode work?
Bioweapon Defense Mode combines a HEPA filter with activated carbon filtration. Together, these systems are designed to reduce exposure to exhaust fumes, smoke, allergens, bacteria, viruses, pollen, mold spores and other airborne pollutants. The system also creates positive pressure inside the cabin, which helps prevent unfiltered outside air from entering.
(Also read: VinFast to sell six times more electric cars than Tesla in India by November 2025)
How can you activate this feature?
The feature can be activated directly from the vehicle’s climate control screen by selecting the biohazard icon. It can also be activated remotely through the Tesla mobile app by opening the Climate section and accessing the Bioweapon Defense Mode option.
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