diff --git a/homeassistant/components/unifi/sensor.py b/homeassistant/components/unifi/sensor.py
index 28db9abb94f..a0cd3a7f1e7 100644
--- a/homeassistant/components/unifi/sensor.py
+++ b/homeassistant/components/unifi/sensor.py
@@ -430,10 +430,10 @@ class UnifiSensorEntity(UnifiEntity[HandlerT, ApiItemT], SensorEntity):
     def _make_disconnected(self, *_: core_Event) -> None:
         """No heart beat by device.
 
-        Reset sensor value to 0 when client device is disconnected
+        Set sensor as unavailable when client device is disconnected
         """
-        if self._attr_native_value != 0:
-            self._attr_native_value = 0
+        if self._attr_available:
+            self._attr_available = False
             self.async_write_ha_state()
 
     @callback
diff --git a/tests/components/unifi/test_sensor.py b/tests/components/unifi/test_sensor.py
index 1a3c81ec4c4..9ebdd207b54 100644
--- a/tests/components/unifi/test_sensor.py
+++ b/tests/components/unifi/test_sensor.py
@@ -416,8 +416,8 @@ async def test_bandwidth_sensors(
         async_fire_time_changed(hass, new_time)
         await hass.async_block_till_done()
 
-    assert hass.states.get("sensor.wireless_client_rx").state == "0"
-    assert hass.states.get("sensor.wireless_client_tx").state == "0"
+    assert hass.states.get("sensor.wireless_client_rx").state == STATE_UNAVAILABLE
+    assert hass.states.get("sensor.wireless_client_tx").state == STATE_UNAVAILABLE
 
     # Disable option