Tesla Bioweapon Defense Mode: What It Is and How It Works

You can activate Bioweapon Defense Mode from the climate section of your Tesla

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Tesla is known for its advanced technology and innovative features, and 'Bioweapon Defense Mode' is one of those features. With increasing concerns about air pollution worldwide, this advanced air filtration system demonstrates Tesla's commitment to passenger safety and well-being.

What is Bioweapon Defense Mode?

Bioweapon Defense Mode is a state-of-the-art air filtration system designed to protect vehicle occupants from various air pollutants, including exhaust fumes, smoke, allergens, airborne pathogens, and other potentially hazardous particles. This feature uses a High-Efficiency Particulate Air (HEPA) filter, capable of capturing 99.97% of particles as small as 0.3 micrometers in diameter, and a secondary filtration system with activated carbon filters to remove odors, gases, bacteria, viruses, pollen, and mold spores.

Tesla's Inspiration and Development of Bioweapon Defense Mode

Tesla's commitment to protecting passengers from air pollution goes beyond merely producing electric vehicles to contribute to a cleaner environment. Tesla CEO Elon Musk has credited Google co-founder Larry Page for inspiring him to develop a more powerful air filtration system for Tesla vehicles. The idea is not only to reduce local air pollution but also to minimize the direct impact of air pollution on the occupants of Tesla vehicles.

How Does Bioweapon Defense Mode Work?

The HEPA filter in Bioweapon Defense Mode is inspired by air filtration systems used in hospitals, clean rooms, and the aerospace industry. When activated, the climate control system pulls in outside air and filters it through the HEPA filter and secondary filtration system. This process effectively removes harmful particles and contaminants from the air.

In addition to the filtration process, Bioweapon Defense Mode creates a positive-pressure environment inside the cabin. This feature, borrowed from hospital settings, prevents outside air from leaking into the vehicle. The result is an air-tight cabin that continuously filters and circulates clean air to protect passengers from pollutants, pathogens, and allergens.

Which Tesla Models Have Bioweapon Defense Mode

Tesla introduced the HEPA filter and Bioweapon Defense Mode in 2016 on the Model X and Model S with the new front fascia. As of 2020, Bioweapon Defense Mode also became standard on Model Y. Tesla could not include the large HEPA filter required for the Bioweapon Defense Mode in Model 3 due to space constraints. However, the bigger Model Y does have enough space to accommodate the filter. Tesla initially introduced the filter and Bioweapon Defense Mode in electric SUVs produced in China and later made it a standard feature in all Model Y vehicles produced.

How to Check If You Have Bioweapon Defense Mode

Tesla owners can confirm whether their vehicle is equipped with Bioweapon Defense Mode by opening the HVAC control screen and looking for the biohazard symbol. If the vehicle is equipped with Bioweapon Defense Mode, there will be a biohazard icon located near the top right of the screen, next to the recirculation icon. If the symbol is present, the vehicle has the feature.

How to Turn On Bioweapon Defense Mode

You can activate Bioweapon Defense Mode from within your car or through the Tesla mobile app.

To activate it within the car, go to the climate control screen and tap the biohazard symbol. The vehicle will immediately start using air from outside the vehicle and running it through its HEPA filter.

To enable the filter from your Tesla app, you can go to the Climate section then swipe up from the bottom. This will reveal several options, including Bioweapon Defense Mode.

Bioweapon Defense Mode Retrofits

For Model S and Model X owners without the HEPA filter, Tesla offers a retrofit option for $500, which includes shipping and installation at a Tesla service center.

Tesla does not offer an official retrofit for for the Model Y, although some owners have shown that it is possible through a DIY solution.

Scientific Testing of Tesla's Bioweapon Defense Mode

When Tesla first introduced the Bioweapon Defense Mode in the Model X in 2015, the company released test results with particulate matter 2.5 air quality readings. The results showed that the system significantly improved air quality when needed. This further validates Tesla's claims about the effectiveness of its advanced air filtration system in protecting passengers from air pollution and other harmful particles.

Demonstrating the Effectiveness of Bioweapon Defense Mode

Tesla's test shows on Bioweapon Defense Mode cleans the air inside of the vehicle after just a couple minutes

Tesla

Tesla has conducted experiments (video below) to demonstrate the effectiveness of its HEPA filtration system and Bioweapon Defense Mode. In one such experiment, a Tesla Model Y and a BMW X3 were parked inside a giant bubble, and smoke bombs were detonated. The Model Y had Bioweapon Defense Mode activated, while the BMW X3 relied on its standard filtration system.

During the experiment, a Tesla employee sat in the driver's seat of the Model Y to showcase the company's confidence in its product. The video showed that the cabin of the Model Y remained free from red smoke, while the interior of the BMW X3 was invaded by it. After the experiment, Model Y's activated carbon filters and HEPA filters were removed, revealing that they had captured a significant amount of red dust.

The filtration system is active whenever climate control is pulling in outside air. In extreme conditions, users can activate Bioweapon Defense Mode, which positively pressurizes the vehicle’s cabin, preventing pollutants from leaking. All air is filtered through the HEPA and gas media filters in this mode.

The Importance of Air Quality in Vehicles

Air pollution is a global issue, and prolonged exposure to air pollutants, such as when stuck in traffic, can have significant health effects, including respiratory and cardiovascular issues. With more time spent in vehicles, ensuring that the air inside the cabin is clean and safe for passengers is crucial. Tesla's Bioweapon Defense Mode addresses this concern by providing a superior air filtration system that reduces exposure to harmful pollutants. This feature not only contributes to the overall well-being of passengers but also sets Tesla apart from other automakers who may not offer such advanced air filtration systems.

Comparison with Other Automakers

The HEPA filter and activated carbon filters in the Model Y

Tesla

While other automakers offer air filtration systems in their vehicles, few can match the level of protection provided by Tesla's Bioweapon Defense Mode. For instance, the BMW X3, which was used in the previously mentioned experiment, does not offer a feature similar to Bioweapon Defense Mode. The experiment highlighted the stark contrast between Tesla's advanced air filtration system and the standard filtration systems found in other vehicles, emphasizing Tesla's commitment to innovation and passenger safety.

Tesla's Bioweapon Defense Mode is a groundbreaking feature demonstrating the company's dedication to passenger safety and well-being. By offering an advanced air filtration system capable of protecting occupants from various air pollutants, Tesla sets itself apart from other automakers in the industry. As air quality continues to be a significant concern worldwide, the Bioweapon Defense Mode is a valuable asset for Tesla owners, ensuring they can breathe clean and safe air inside their vehicles.

Tesla Reintroduces FSD Transfers in North America

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Following customer requests, Tesla has once again returned FSD Transfers for North America. This comes after some new details we received on FSD Supervised and Unsupervised at the recent Q1 2025 Earnings Call.

Vox Populi, Vox Dei … FSD Transfer is back

All countries (in NA), all S3XY + @cybertruck (excl Foundation Series & Launch Series)

— Tesla North America (@tesla_na) April 25, 2025

FSD Transfers

This latest round of FSD transfers doesn’t have a specific time limit - so if you’re in the market for a new vehicle and were worried about transferring FSD from a HW3 vehicle - now is the best chance.

This transfer opportunity is applicable for any new vehicle purchases, including the Model S, 3, X, Y, as well as the Cybertruck. The only vehicles it doesn’t apply to are the Foundation-Series Cybertruck or a Launch-Series Model Y, which already come with FSD included.

If you’re conducting an FSD transfer, you’ll need to reach out to your Tesla delivery coordinator through the Tesla app to confirm you’re eligible and to get the process started.

Note that once you take delivery, FSD access is removed from your older vehicle, regardless if you plan to trade in your vehicle or keep it.

Canada and Mexico

For those in Canada and Mexico, there’s some good news. This opportunity is available for customers in those countries as well, however, new vehicle orders are currently paused in Canada and Mexico for unknown reasons.

Running Offers

There are also several other offers running in North America, with the country flags indicating which countries their available in:

0% Financing on new Model 3 Orders (60mo, 0.99% for 72mo) 🇺🇸

Deep Blue Metallic and Pearl White are currently free on a new Model 3 Performance 🇺🇸

Original Model Y Owners are receiving $2,000 off the purchase of a Refreshed Model Y 🇺🇸 🇨🇦 🇲🇽

Free Supercharging on the Model S and Model X 🇺🇸 🇨🇦 🇲🇽

Free Supercharging on the Foundation-Series Cybertruck 🇺🇸 🇨🇦 🇲🇽

Inventory Vehicle Discounts 🇺🇸 🇨🇦 🇲🇽

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Tesla Shares Robotaxi Details: 10-20 Cars at Launch, Vehicle UI and App Teased

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Tesla’s long-awaited ambitions for a fully autonomous Robotaxi network powered by the futuristic, control-less Cybercab have finally started to take shape.

During their Q1 2025 earnings call, Tesla shared new details about its Robotaxi network, including that the network will start with new Model Ys. The Cybercab will join the network in 2026.

Robotaxi Plans

Tesla confirmed during the Earnings Call that it is on track to conduct the pilot launch of its Robotaxi network in Austin in June 2025. The first vehicles deployed for this service won’t be Cybercabs, as production for those is still in the prototyping stage.

However, Tesla did outline part of their plan for the Robotaxi network rollout. The initial aim is to begin driverless operations in Austin and then expand the service to other cities within the United States by the end of 2025. Interestingly, Tesla is also testing in California - albeit with safety drivers at this time.

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Looking further ahead, there are ambitious plans to ramp up operations to have millions of vehicles operating autonomously within the network by the end of 2026. While substantial revenue generation won’t be immediate, Tesla anticipates that the Robotaxi network will start to “meaningfully move the financial needle” in the second half of 2026.

Tesla also highlighted the current real-world benefits that FSD is already offering today—and will be able to offer to many more people in the near future.

These include reducing effort and time spent on daily commuting or transit, as well as improving mobility for customers with disabilities. Tesla plans to emphasize some of these community stories and wants to highlight the advantages and capabilities of FSD to improve people’s lives.

Robotaxi App and Robotaxi Vehicle UI

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After the call, Tesla AI also shared a video showcasing the Robotaxi interface in the Tesla app, as well as some footage that included the in-vehicle UI, at least as it currently stands.

The video shows Tesla employees using and testing Robotaxi features, although there are safety drivers in place. It looks like there is already a set of well-integrated UI mechanisms for both the front and rear screen when in Robotaxi mode.

Tesla is testing this today, and this network has already completed 1,500 trips, totaling approximately 15,000 miles. The system is being tested for vehicle allocation, mission control, and remote assistance operations.

Remote Operators

Inevitably, edge cases or unique situations will come up, and they will be difficult to handle. For these cases, where a Robotaxi vehicle gets stuck or requires assistance, Tesla will likely implement remote support. 

While they didn’t completely confirm remote support operators on the Earnings Call, Tesla has previously posted positions for Teleoperator Engineers for Robotaxi, and an AI T=team member posted on LinkedIn about testing for remote assistance operations.

Scaling Up

Tesla initially intends to deploy a relatively small fleet in Austin, with its pilot beginning with about 10 to 20 vehicles on day 1. They will scale up gradually as the systems are validated and operations are refined, and the target is for anyone visiting Austin to be able to hail a robotaxi by the end of June or early July 2025.

Scaling Out

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Tesla’s confidence in scaling out stems from its generalized approach with FSD. The team believes that once FSD is thoroughly verified and capable in a few diverse North American cities, deploying it to any other North American city should be technically feasible. After all, driving regulations don’t vary much from one major city to another, except for things like no right turns on red lights. 

The primary limitation with scaling out geographically is expected to be securing regulatory approvals in different regions and jurisdictions. While the principles of Tesla’s FSD are expected to apply globally, as with the China rollout, regulation will continue to be a considerable hurdle.

Cybercab

FSD Supervised ride-hailing service is live for an early set of employees in Austin & San Francisco Bay Area.

We've completed over 1.5k trips & 15k miles of driving.

This service helps us develop & validate FSD networks, the mobile app, vehicle allocation, mission control &… pic.twitter.com/pYVfhi935W

— Tesla AI (@Tesla_AI) April 23, 2025

Tesla’s fully autonomous, two-seater vehicle, the Cybercab, is also being developed. While volume production for the Cybercab won’t begin until 2026, Tesla is already undergoing sample production validation. The first actual Cybercab builds are expected to be completed near the end of Q2 2025, and we’re excited to see if anything changes from the prototypes shown at We, Robot.

Tesla intends to build Cybercab at Giga Texas, and the production line is on schedule, according to Tesla. Cybercab production will not require a new building and will be built inside the existing Giga Texas factory.

Unboxed Method

Tesla's Shareholder Deck for Q1 2025 is now out, and we're 40 minutes away from the Earnings Call.

It seems Tesla won't be using the unboxed process for its more affordable model - which is a new vehicle.

Instead, they plan to use it for Cybercab soon! pic.twitter.com/0yddfWieJQ

— Not a Tesla App (@NotATeslaApp) April 22, 2025

The Cybercab’s production and low-cost methodology heavily rely upon Tesla’s innovative new unboxed manufacturing method. Tesla’s executive team mentioned that progress and implementation with this new manufacturing solution was going well, and it will be key to lowering the cost of production while considerably raising the level of automation.

Tesla has already achieved key milestones with this method, including successfully integrating large sub-assemblies and resolving challenges related to connecting portions of the vehicle's ceiling during the process. They have also successfully completed corrosion testing related to the new assembly method, as well as begun initial crash testing for the Cybercab.

All of that and more will eventually be incorporated into other vehicle production lines, and the Cybertruck is already benefiting from some aspects of these developments. With a final ambition of achieving a 5-second cycle time per Cybercab, Tesla has come a long way—but it still has quite a bit to go. They’ve managed to meet a 33-second cycle time for the Model Y at Giga Shanghai between two production lines, but 5 seconds per vehicle is quite ambitious.

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With all that said, between Robotaxi and Cybercab, there is a lot of interesting news coming from Tesla. We expect this to continue throughout the year as Tesla launches its network and then aims to release FSD Unsupervised to customers, with a potential price increase.

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