diff --git a/teslajsonpy/car.py b/teslajsonpy/car.py
index df9e568..a659fb0 100644
--- a/teslajsonpy/car.py
+++ b/teslajsonpy/car.py
@@ -215,6 +215,11 @@ def charger_voltage(self) -> int:
         """Return charger voltage."""
         return self._vehicle_data.get("charge_state", {}).get("charger_voltage")
 
+    @property
+    def bioweapon_mode(self) -> bool:
+        """Return bioweapon defense mode."""
+        return self._vehicle_data.get("climate_state", {}).get("bioweapon_mode")
+    
     @property
     def climate_keeper_mode(self) -> str:
         """Return climate keeper mode mode.
@@ -956,6 +961,26 @@ async def set_climate_keeper_mode(self, keeper_id: int) -> None:
             }
             self._vehicle_data["climate_state"].update(params)
 
+    async def set_bioweapon_mode(self, enable: bool) -> None:
+        """Send command to set bioweapon mode.
+
+        Args
+            enable: 'True' to enable, 'False' to disable
+
+        """
+        # If car is asleep, bioweapon is already off
+        data = await self._send_command(
+            "HVAC_BIOWEAPON_MODE",
+            on=enable,
+            manual_override=True,
+        )
+        if data and data["response"]["result"] is True:
+            params = {
+                "bioweapon_mode": enable,
+                "is_climate_on": True,
+            }
+            self._vehicle_data["climate_state"].update(params)
+    
     async def remote_auto_seat_climate_request(
         self, seat_id: int, enable: bool
     ) -> None:
diff --git a/tests/tesla_mock.py b/tests/tesla_mock.py
index ae0a0c8..9733650 100644
--- a/tests/tesla_mock.py
+++ b/tests/tesla_mock.py
@@ -470,6 +470,7 @@ def command_ok():
         "auto_steering_wheel_heat": True,
         "battery_heater": False,
         "battery_heater_no_power": False,
+        "bioweapon_mode": False,
         "cabin_overheat_protection": "Off",
         "climate_keeper_mode": "off",
         "defrost_mode": 0,
diff --git a/tests/unit_tests/test_car.py b/tests/unit_tests/test_car.py
index bbcf630..94347b0 100644
--- a/tests/unit_tests/test_car.py
+++ b/tests/unit_tests/test_car.py
@@ -50,6 +50,8 @@ async def test_car_properties(monkeypatch):
 
     assert _car.battery_range == VEHICLE_DATA["charge_state"]["battery_range"]
 
+    assert _car.bioweapon_mode == VEHICLE_DATA["climate_state"]["bioweapon_mode"]
+
     assert (
         _car.cabin_overheat_protection
         == VEHICLE_DATA["climate_state"]["cabin_overheat_protection"]
@@ -452,6 +454,18 @@ async def test_schedule_software_update(monkeypatch):
     assert await _car.schedule_software_update() is None
 
 
+@pytest.mark.asyncio
+async def test_set_bioweapon_mode(monkeypatch):
+    """Test setting bioweapon mode."""
+    TeslaMock(monkeypatch)
+    _controller = Controller(None)
+    await _controller.connect()
+    await _controller.generate_car_objects()
+    _car = _controller.cars[VIN]
+
+    assert await _car.set_bioweapon_mode(True) is None
+
+
 @pytest.mark.asyncio
 async def test_set_charging_amps(monkeypatch):
     """Test setting charging amps."""