diff --git a/homeassistant/components/bosch_alarm/config_flow.py b/homeassistant/components/bosch_alarm/config_flow.py
index 4b1e3e511fc..9e664e49ca9 100644
--- a/homeassistant/components/bosch_alarm/config_flow.py
+++ b/homeassistant/components/bosch_alarm/config_flow.py
@@ -11,7 +11,12 @@ from typing import Any
 from bosch_alarm_mode2 import Panel
 import voluptuous as vol
 
-from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
+from homeassistant.config_entries import (
+    SOURCE_RECONFIGURE,
+    SOURCE_USER,
+    ConfigFlow,
+    ConfigFlowResult,
+)
 from homeassistant.const import (
     CONF_CODE,
     CONF_HOST,
@@ -108,6 +113,13 @@ class BoschAlarmConfigFlow(ConfigFlow, domain=DOMAIN):
             else:
                 self._data = user_input
                 self._data[CONF_MODEL] = model
+
+                if self.source == SOURCE_RECONFIGURE:
+                    if (
+                        self._get_reconfigure_entry().data[CONF_MODEL]
+                        != self._data[CONF_MODEL]
+                    ):
+                        return self.async_abort(reason="device_mismatch")
                 return await self.async_step_auth()
         return self.async_show_form(
             step_id="user",
@@ -117,6 +129,12 @@ class BoschAlarmConfigFlow(ConfigFlow, domain=DOMAIN):
             errors=errors,
         )
 
+    async def async_step_reconfigure(
+        self, user_input: dict[str, Any] | None = None
+    ) -> ConfigFlowResult:
+        """Handle the reconfigure step."""
+        return await self.async_step_user()
+
     async def async_step_auth(
         self, user_input: dict[str, Any] | None = None
     ) -> ConfigFlowResult:
@@ -154,10 +172,22 @@ class BoschAlarmConfigFlow(ConfigFlow, domain=DOMAIN):
             else:
                 if serial_number:
                     await self.async_set_unique_id(str(serial_number))
-                    self._abort_if_unique_id_configured()
-                else:
-                    self._async_abort_entries_match({CONF_HOST: self._data[CONF_HOST]})
-                return self.async_create_entry(title=f"Bosch {model}", data=self._data)
+                if self.source == SOURCE_USER:
+                    if serial_number:
+                        self._abort_if_unique_id_configured()
+                    else:
+                        self._async_abort_entries_match(
+                            {CONF_HOST: self._data[CONF_HOST]}
+                        )
+                    return self.async_create_entry(
+                        title=f"Bosch {model}", data=self._data
+                    )
+                if serial_number:
+                    self._abort_if_unique_id_mismatch(reason="device_mismatch")
+                return self.async_update_reload_and_abort(
+                    self._get_reconfigure_entry(),
+                    data=self._data,
+                )
 
         return self.async_show_form(
             step_id="auth",
diff --git a/homeassistant/components/bosch_alarm/strings.json b/homeassistant/components/bosch_alarm/strings.json
index 3123c1697f3..aad55eb04b1 100644
--- a/homeassistant/components/bosch_alarm/strings.json
+++ b/homeassistant/components/bosch_alarm/strings.json
@@ -43,7 +43,9 @@
     },
     "abort": {
       "already_configured": "[%key:common::config_flow::abort::already_configured_device%]",
-      "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]"
+      "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]",
+      "reconfigure_successful": "[%key:common::config_flow::abort::reconfigure_successful%]",
+      "device_mismatch": "Please ensure you reconfigure against the same device."
     }
   },
   "exceptions": {
diff --git a/tests/components/bosch_alarm/test_config_flow.py b/tests/components/bosch_alarm/test_config_flow.py
index 4a1c9dad3ea..9e79d1c1f5f 100644
--- a/tests/components/bosch_alarm/test_config_flow.py
+++ b/tests/components/bosch_alarm/test_config_flow.py
@@ -283,3 +283,85 @@ async def test_reauth_flow_error(
     assert result["reason"] == "reauth_successful"
     compare = {**mock_config_entry.data, **config_flow_data}
     assert compare == mock_config_entry.data
+
+
+async def test_reconfig_flow(
+    hass: HomeAssistant,
+    mock_setup_entry: AsyncMock,
+    mock_config_entry: MockConfigEntry,
+    mock_panel: AsyncMock,
+    model_name: str,
+    serial_number: str,
+    config_flow_data: dict[str, Any],
+) -> None:
+    """Test reconfig auth."""
+    await setup_integration(hass, mock_config_entry)
+
+    config_flow_data = {k: f"{v}2" for k, v in config_flow_data.items()}
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN,
+        context={
+            "source": config_entries.SOURCE_RECONFIGURE,
+            "entry_id": mock_config_entry.entry_id,
+        },
+    )
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "user"
+    assert result["errors"] == {}
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        {CONF_HOST: "1.1.1.1", CONF_PORT: 7700},
+    )
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "auth"
+    assert result["errors"] == {}
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        config_flow_data,
+    )
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "reconfigure_successful"
+    assert mock_config_entry.data == {
+        CONF_HOST: "1.1.1.1",
+        CONF_PORT: 7700,
+        CONF_MODEL: model_name,
+        **config_flow_data,
+    }
+
+
+@pytest.mark.parametrize("model", ["b5512"])
+async def test_reconfig_flow_incorrect_model(
+    hass: HomeAssistant,
+    mock_setup_entry: AsyncMock,
+    mock_config_entry: MockConfigEntry,
+    mock_panel: AsyncMock,
+    model_name: str,
+    serial_number: str,
+    config_flow_data: dict[str, Any],
+) -> None:
+    """Test reconfig fails with a different device."""
+    await setup_integration(hass, mock_config_entry)
+
+    config_flow_data = {k: f"{v}2" for k, v in config_flow_data.items()}
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN,
+        context={
+            "source": config_entries.SOURCE_RECONFIGURE,
+            "entry_id": mock_config_entry.entry_id,
+        },
+    )
+
+    mock_panel.model = "Solution 3000"
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "user"
+    assert result["errors"] == {}
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        {CONF_HOST: "0.0.0.0", CONF_PORT: 7700},
+    )
+
+    await hass.async_block_till_done()
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "device_mismatch"