Which Tesla model was the first to offer the Bioweapon Defense Mode?

The Tesla Model X was the first Tesla model to offer Bioweapon Defense Mode.

Tesla introduced the feature with the Model X at its customer-delivery event in September 2015. It combined a large medical-grade HEPA filter with a sealed, positively pressurized cabin. The system was designed to reduce the entry of airborne particles such as pollution, smoke, pollen and bacteria when the feature was activated.

The name was deliberately dramatic: Elon Musk used it to emphasize the filter’s ability to remove extremely small particles, not to suggest that the vehicle is protective equipment for biological warfare. The system is an air-filtration and climate-control function, not a substitute for masks or other safety measures.

The feature later appeared on the Model S and, in some markets and configurations, other Tesla vehicles. That later availability creates the common mix-up, but the Model X remains the original Tesla model associated with its debut. The Model X also helped popularize the feature because of its distinctive falcon-wing doors and SUV body style.