diff --git a/homeassistant/components/tesla_fleet/models.py b/homeassistant/components/tesla_fleet/models.py
index d81ceada6966..9515aea791a5 100644
--- a/homeassistant/components/tesla_fleet/models.py
+++ b/homeassistant/components/tesla_fleet/models.py
@@ -1,7 +1,7 @@
 """The Tesla Fleet integration models."""
 
 import asyncio
-from dataclasses import dataclass
+from dataclasses import dataclass, field
 
 from tesla_fleet_api.const import Scope
 from tesla_fleet_api.tesla import EnergySite, VehicleFleet
@@ -34,7 +34,7 @@ class TeslaFleetVehicleData:
     vin: str
     device: DeviceInfo
     signing: bool
-    wakelock = asyncio.Lock()
+    wakelock: asyncio.Lock = field(default_factory=asyncio.Lock)
 
 
 @dataclass
diff --git a/tests/components/tesla_fleet/test_models.py b/tests/components/tesla_fleet/test_models.py
new file mode 100644
index 000000000000..eac52bdec0c8
--- /dev/null
+++ b/tests/components/tesla_fleet/test_models.py
@@ -0,0 +1,20 @@
+"""Test the Tesla Fleet models."""
+
+from unittest.mock import Mock
+
+from homeassistant.components.tesla_fleet.models import TeslaFleetVehicleData
+
+
+def test_wakelock_is_per_instance() -> None:
+    """Each vehicle must get its own wakelock, not a lock shared across the account."""
+    kwargs = {
+        "api": Mock(),
+        "coordinator": Mock(),
+        "vin": "VIN",
+        "device": Mock(),
+        "signing": False,
+    }
+    a = TeslaFleetVehicleData(**kwargs)
+    b = TeslaFleetVehicleData(**kwargs)
+
+    assert a.wakelock is not b.wakelock