diff --git a/homeassistant/components/tado/entity.py b/homeassistant/components/tado/entity.py
index bb92880d99b4..2771d86d8e94 100644
--- a/homeassistant/components/tado/entity.py
+++ b/homeassistant/components/tado/entity.py
@@ -2,6 +2,7 @@
 
 import logging
 
+from homeassistant.helpers import device_registry as dr
 from homeassistant.helpers.device_registry import DeviceInfo
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
@@ -28,11 +29,15 @@ class TadoDeviceEntity(TadoCoordinatorEntity):
         self._device_info = device_info
         self.device_name = device_info["serialNo"]
         self.device_id = device_info["shortSerialNo"]
-        via_device: tuple[str, str] | None = None
+        via_device_id: str | None = None
         if device_info["deviceType"] not in TADO_BRIDGE_MODELS:
             for device in coordinator.data["device"].values():
                 if device["deviceType"] in TADO_BRIDGE_MODELS:
-                    via_device = (DOMAIN, device["shortSerialNo"])
+                    via_device_id = dr.async_get_device_id_by_identifier(
+                        coordinator.hass,
+                        (DOMAIN, device["shortSerialNo"]),
+                        config_entry_id=coordinator.config_entry.entry_id,
+                    )
                     break
 
         self._attr_device_info = DeviceInfo(
@@ -43,8 +48,8 @@ class TadoDeviceEntity(TadoCoordinatorEntity):
             sw_version=device_info["currentFwVersion"],
             model=device_info["deviceType"],
         )
-        if via_device:
-            self._attr_device_info["via_device"] = via_device
+        if via_device_id:
+            self._attr_device_info["via_device_id"] = via_device_id
 
 
 class TadoHomeEntity(TadoCoordinatorEntity):
diff --git a/tests/components/tado/fixtures/devices.json b/tests/components/tado/fixtures/devices.json
index a9313ae051b2..144790c94ec3 100644
--- a/tests/components/tado/fixtures/devices.json
+++ b/tests/components/tado/fixtures/devices.json
@@ -34,5 +34,18 @@
       "capabilities": ["INSIDE_TEMPERATURE_MEASUREMENT", "IDENTIFY"]
     },
     "childLockEnabled": false
+  },
+  {
+    "deviceType": "IB01",
+    "currentFwVersion": "62.7",
+    "characteristics": {
+      "capabilities": []
+    },
+    "serialNo": "IB1234",
+    "shortSerialNo": "IB1234",
+    "connectionState": {
+      "value": true,
+      "timestamp": "2020-03-23T18:30:07.377Z"
+    }
   }
 ]
diff --git a/tests/components/tado/snapshots/test_binary_sensor.ambr b/tests/components/tado/snapshots/test_binary_sensor.ambr
index c5dda35039e1..29d927509d15 100644
--- a/tests/components/tado/snapshots/test_binary_sensor.ambr
+++ b/tests/components/tado/snapshots/test_binary_sensor.ambr
@@ -869,6 +869,57 @@
     'state': 'off',
   })
 # ---
+# name: test_entities[binary_sensor.ib1234_connection_state-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': list([
+      None,
+    ]),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'binary_sensor',
+    'entity_category': None,
+    'entity_id': 'binary_sensor.ib1234_connection_state',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': 'Connection state',
+    'options': dict({
+    }),
+    'original_device_class': <BinarySensorDeviceClass.CONNECTIVITY: 'connectivity'>,
+    'original_icon': None,
+    'original_name': 'Connection state',
+    'platform': 'tado',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': 'connection_state',
+    'unique_id': 'connection state IB1234 1',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_entities[binary_sensor.ib1234_connection_state-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      <EntityStateAttribute.DEVICE_CLASS: 'device_class'>: 'connectivity',
+      <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'IB1234 Connection state',
+    }),
+    'context': <ANY>,
+    'entity_id': 'binary_sensor.ib1234_connection_state',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'on',
+  })
+# ---
 # name: test_entities[binary_sensor.second_water_heater_second_water_heater_connectivity-entry]
   EntityRegistryEntrySnapshot({
     'aliases': list([
diff --git a/tests/components/tado/snapshots/test_diagnostics.ambr b/tests/components/tado/snapshots/test_diagnostics.ambr
index 1125cc777065..1ea74be559ed 100644
--- a/tests/components/tado/snapshots/test_diagnostics.ambr
+++ b/tests/components/tado/snapshots/test_diagnostics.ambr
@@ -3,6 +3,20 @@
   dict({
     'data': dict({
       'device': dict({
+        'IB1234': dict({
+          'characteristics': dict({
+            'capabilities': list([
+            ]),
+          }),
+          'connectionState': dict({
+            'timestamp': '2020-03-23T18:30:07.377Z',
+            'value': True,
+          }),
+          'currentFwVersion': '62.7',
+          'deviceType': 'IB01',
+          'serialNo': 'IB1234',
+          'shortSerialNo': 'IB1234',
+        }),
         'WR1': dict({
           'accessPointWiFi': dict({
             'ssid': 'tado8480',
diff --git a/tests/components/tado/test_init.py b/tests/components/tado/test_init.py
index 10acd8eef594..afbbf8a25eac 100644
--- a/tests/components/tado/test_init.py
+++ b/tests/components/tado/test_init.py
@@ -6,10 +6,12 @@ import time
 from unittest.mock import patch
 
 from PyTado.http import Http
+import pytest
 
 from homeassistant.components.tado import DOMAIN
 from homeassistant.const import CONF_PASSWORD, CONF_USERNAME
 from homeassistant.core import HomeAssistant
+from homeassistant.helpers import device_registry as dr
 
 from tests.common import MockConfigEntry
 
@@ -32,6 +34,25 @@ async def test_v1_migration(hass: HomeAssistant) -> None:
     assert CONF_USERNAME not in entry.data
 
 
+@pytest.mark.usefixtures("init_integration")
+async def test_device_via_device_links(
+    hass: HomeAssistant, device_registry: dr.DeviceRegistry
+) -> None:
+    """Test that child devices link to the bridge via via_device_id."""
+    config_entry = hass.config_entries.async_entries(DOMAIN)[0]
+
+    bridge_device = device_registry.async_get_device_by_identifier(
+        (DOMAIN, "IB1234"), config_entry.entry_id
+    )
+    assert bridge_device is not None
+
+    child_device = device_registry.async_get_device_by_identifier(
+        (DOMAIN, "WR1"), config_entry.entry_id
+    )
+    assert child_device is not None
+    assert child_device.via_device_id == bridge_device.id
+
+
 async def test_refresh_token_threading_lock(hass: HomeAssistant) -> None:
     """Test that threading.Lock in Http._refresh_token serializes concurrent calls."""