diff --git a/homeassistant/components/husqvarna_automower/diagnostics.py b/homeassistant/components/husqvarna_automower/diagnostics.py
new file mode 100644
index 00000000000..7a715292a07
--- /dev/null
+++ b/homeassistant/components/husqvarna_automower/diagnostics.py
@@ -0,0 +1,46 @@
+"""Diagnostics support for Husqvarna Automower."""
+from __future__ import annotations
+
+import logging
+from typing import Any
+
+from homeassistant.components.diagnostics import async_redact_data
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import CONF_ACCESS_TOKEN
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.device_registry import DeviceEntry
+
+from .const import DOMAIN
+from .coordinator import AutomowerDataUpdateCoordinator
+
+CONF_REFRESH_TOKEN = "refresh_token"
+POSITIONS = "positions"
+
+TO_REDACT = {
+    CONF_ACCESS_TOKEN,
+    CONF_REFRESH_TOKEN,
+    POSITIONS,
+}
+_LOGGER = logging.getLogger(__name__)
+
+
+async def async_get_config_entry_diagnostics(
+    hass: HomeAssistant, entry: ConfigEntry
+) -> dict[str, Any]:
+    """Return diagnostics for a config entry."""
+    return async_redact_data(entry.as_dict(), TO_REDACT)
+
+
+async def async_get_device_diagnostics(
+    hass: HomeAssistant, entry: ConfigEntry, device: DeviceEntry
+) -> dict[str, Any]:
+    """Return diagnostics for a device entry."""
+    coordinator: AutomowerDataUpdateCoordinator = hass.data[DOMAIN][entry.entry_id]
+    for identifier in device.identifiers:
+        if identifier[0] == DOMAIN:
+            if (
+                coordinator.data[identifier[1]].system.serial_number
+                == device.serial_number
+            ):
+                mower_id = identifier[1]
+    return async_redact_data(coordinator.data[mower_id].to_dict(), TO_REDACT)
diff --git a/tests/components/husqvarna_automower/snapshots/test_diagnostics.ambr b/tests/components/husqvarna_automower/snapshots/test_diagnostics.ambr
new file mode 100644
index 00000000000..577d49cd026
--- /dev/null
+++ b/tests/components/husqvarna_automower/snapshots/test_diagnostics.ambr
@@ -0,0 +1,129 @@
+# serializer version: 1
+# name: test_device_diagnostics
+  dict({
+    'battery': dict({
+      'battery_percent': 100,
+    }),
+    'calendar': dict({
+      'tasks': list([
+        dict({
+          'duration': 300,
+          'friday': True,
+          'monday': True,
+          'saturday': False,
+          'start': 1140,
+          'sunday': False,
+          'thursday': False,
+          'tuesday': False,
+          'wednesday': True,
+          'work_area_id': None,
+        }),
+        dict({
+          'duration': 480,
+          'friday': False,
+          'monday': False,
+          'saturday': True,
+          'start': 0,
+          'sunday': False,
+          'thursday': True,
+          'tuesday': True,
+          'wednesday': False,
+          'work_area_id': None,
+        }),
+      ]),
+    }),
+    'capabilities': dict({
+      'headlights': True,
+      'position': True,
+      'stay_out_zones': False,
+      'work_areas': False,
+    }),
+    'cutting_height': 4,
+    'headlight': dict({
+      'mode': 'EVENING_ONLY',
+    }),
+    'metadata': dict({
+      'connected': True,
+      'status_dateteime': '2023-10-18T22:58:52.683000+00:00',
+    }),
+    'mower': dict({
+      'activity': 'PARKED_IN_CS',
+      'error_code': 0,
+      'error_dateteime': None,
+      'error_key': None,
+      'mode': 'MAIN_AREA',
+      'state': 'RESTRICTED',
+    }),
+    'planner': dict({
+      'next_start_dateteime': '2023-06-05T19:00:00+00:00',
+      'override': dict({
+        'action': 'NOT_ACTIVE',
+      }),
+      'restricted_reason': 'WEEK_SCHEDULE',
+    }),
+    'positions': '**REDACTED**',
+    'statistics': dict({
+      'cutting_blade_usage_time': 123,
+      'number_of_charging_cycles': 1380,
+      'number_of_collisions': 11396,
+      'total_charging_time': 4334400,
+      'total_cutting_time': 4194000,
+      'total_drive_distance': 1780272,
+      'total_running_time': 4564800,
+      'total_searching_time': 370800,
+    }),
+    'stay_out_zones': dict({
+      'dirty': False,
+      'zones': dict({
+        '81C6EEA2-D139-4FEA-B134-F22A6B3EA403': dict({
+          'enabled': True,
+          'name': 'Springflowers',
+        }),
+      }),
+    }),
+    'system': dict({
+      'model': '450XH-TEST',
+      'name': 'Test Mower 1',
+      'serial_number': 123,
+    }),
+    'work_areas': dict({
+      '0': dict({
+        'cutting_height': 50,
+        'name': None,
+      }),
+      '123456': dict({
+        'cutting_height': 50,
+        'name': 'Front lawn',
+      }),
+    }),
+  })
+# ---
+# name: test_entry_diagnostics
+  dict({
+    'data': dict({
+      'auth_implementation': 'husqvarna_automower',
+      'token': dict({
+        'access_token': '**REDACTED**',
+        'expires_at': 1709208000.0,
+        'expires_in': 86399,
+        'provider': 'husqvarna',
+        'refresh_token': '**REDACTED**',
+        'scope': 'iam:read amc:api',
+        'token_type': 'Bearer',
+        'user_id': '123',
+      }),
+    }),
+    'disabled_by': None,
+    'domain': 'husqvarna_automower',
+    'entry_id': 'automower_test',
+    'minor_version': 1,
+    'options': dict({
+    }),
+    'pref_disable_new_entities': False,
+    'pref_disable_polling': False,
+    'source': 'user',
+    'title': 'Husqvarna Automower of Erika Mustermann',
+    'unique_id': '123',
+    'version': 1,
+  })
+# ---
diff --git a/tests/components/husqvarna_automower/test_diagnostics.py b/tests/components/husqvarna_automower/test_diagnostics.py
new file mode 100644
index 00000000000..56eb0fdadde
--- /dev/null
+++ b/tests/components/husqvarna_automower/test_diagnostics.py
@@ -0,0 +1,61 @@
+"""Test the Husqvarna Automower Diagnostics."""
+import datetime
+from unittest.mock import AsyncMock
+
+import pytest
+from syrupy.assertion import SnapshotAssertion
+
+from homeassistant.components.husqvarna_automower.const import DOMAIN
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import device_registry as dr
+
+from .const import TEST_MOWER_ID
+
+from tests.common import MockConfigEntry
+from tests.components.diagnostics import (
+    get_diagnostics_for_config_entry,
+    get_diagnostics_for_device,
+)
+from tests.typing import ClientSessionGenerator
+
+
+@pytest.mark.freeze_time(datetime.datetime(2024, 2, 29, 11, tzinfo=datetime.UTC))
+async def test_entry_diagnostics(
+    hass: HomeAssistant,
+    hass_client: ClientSessionGenerator,
+    snapshot: SnapshotAssertion,
+    mock_automower_client: AsyncMock,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """Test config entry diagnostics."""
+
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+    result = await get_diagnostics_for_config_entry(
+        hass, hass_client, mock_config_entry
+    )
+    assert result == snapshot
+
+
+async def test_device_diagnostics(
+    hass: HomeAssistant,
+    hass_client: ClientSessionGenerator,
+    snapshot: SnapshotAssertion,
+    mock_automower_client: AsyncMock,
+    mock_config_entry: MockConfigEntry,
+    device_registry: dr.DeviceRegistry,
+) -> None:
+    """Test select platform."""
+
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+    reg_device = device_registry.async_get_device(
+        identifiers={(DOMAIN, TEST_MOWER_ID)},
+    )
+    assert reg_device is not None
+    result = await get_diagnostics_for_device(
+        hass, hass_client, mock_config_entry, reg_device
+    )
+    assert result == snapshot