diff --git a/homeassistant/components/xiaomi_ble/config_flow.py b/homeassistant/components/xiaomi_ble/config_flow.py
index 092c60e9713..725c513914f 100644
--- a/homeassistant/components/xiaomi_ble/config_flow.py
+++ b/homeassistant/components/xiaomi_ble/config_flow.py
@@ -260,7 +260,7 @@ class XiaomiConfigFlow(ConfigFlow, domain=DOMAIN):
         entry = self.hass.config_entries.async_get_entry(self.context["entry_id"])
         assert entry is not None
 
-        device: DeviceData = self.context["device"]
+        device: DeviceData = entry_data["device"]
         self._discovered_device = device
 
         self._discovery_info = device.last_service_info
diff --git a/homeassistant/components/xiaomi_ble/sensor.py b/homeassistant/components/xiaomi_ble/sensor.py
index fef9b334e75..dcb95422609 100644
--- a/homeassistant/components/xiaomi_ble/sensor.py
+++ b/homeassistant/components/xiaomi_ble/sensor.py
@@ -181,7 +181,7 @@ def process_service_info(
         and data.encryption_scheme != EncryptionScheme.NONE
         and not data.bindkey_verified
     ):
-        entry.async_start_reauth(hass, context={"device": data})
+        entry.async_start_reauth(hass, data={"device": data})
 
     return sensor_update_to_bluetooth_data_update(update)
 
diff --git a/homeassistant/config_entries.py b/homeassistant/config_entries.py
index 638aa0b8110..7c2f1c84ff9 100644
--- a/homeassistant/config_entries.py
+++ b/homeassistant/config_entries.py
@@ -641,7 +641,10 @@ class ConfigEntry:
 
     @callback
     def async_start_reauth(
-        self, hass: HomeAssistant, context: dict[str, Any] | None = None
+        self,
+        hass: HomeAssistant,
+        context: dict[str, Any] | None = None,
+        data: dict[str, Any] | None = None,
     ) -> None:
         """Start a reauth flow."""
         flow_context = {
@@ -662,7 +665,7 @@ class ConfigEntry:
             hass.config_entries.flow.async_init(
                 self.domain,
                 context=flow_context,
-                data=self.data,
+                data=self.data | (data or {}),
             )
         )
 
diff --git a/tests/components/xiaomi_ble/test_config_flow.py b/tests/components/xiaomi_ble/test_config_flow.py
index 0d123f0cd54..32ba6be3322 100644
--- a/tests/components/xiaomi_ble/test_config_flow.py
+++ b/tests/components/xiaomi_ble/test_config_flow.py
@@ -1033,9 +1033,8 @@ async def test_async_step_reauth_abort_early(hass):
             "entry_id": entry.entry_id,
             "title_placeholders": {"name": entry.title},
             "unique_id": entry.unique_id,
-            "device": device,
         },
-        data=entry.data,
+        data=entry.data | {"device": device},
     )
 
     assert result["type"] == FlowResultType.ABORT
diff --git a/tests/test_config_entries.py b/tests/test_config_entries.py
index 66f51508441..b923e37b636 100644
--- a/tests/test_config_entries.py
+++ b/tests/test_config_entries.py
@@ -3286,8 +3286,14 @@ async def test_reauth(hass):
     await entry.async_setup(hass)
     await hass.async_block_till_done()
 
-    entry.async_start_reauth(hass, {"extra_context": "some_extra_context"})
-    await hass.async_block_till_done()
+    flow = hass.config_entries.flow
+    with patch.object(flow, "async_init", wraps=flow.async_init) as mock_init:
+        entry.async_start_reauth(
+            hass,
+            context={"extra_context": "some_extra_context"},
+            data={"extra_data": 1234},
+        )
+        await hass.async_block_till_done()
 
     flows = hass.config_entries.flow.async_progress()
     assert len(flows) == 1
@@ -3296,6 +3302,8 @@ async def test_reauth(hass):
     assert flows[0]["context"]["title_placeholders"] == {"name": "test_title"}
     assert flows[0]["context"]["extra_context"] == "some_extra_context"
 
+    assert mock_init.call_args.kwargs["data"]["extra_data"] == 1234
+
     # Check we can't start duplicate flows
     entry.async_start_reauth(hass, {"extra_context": "some_extra_context"})
     await hass.async_block_till_done()