diff --git a/homeassistant/components/volvooncall/__init__.py b/homeassistant/components/volvooncall/__init__.py
index c408080524ebed..232ecf477f7652 100644
--- a/homeassistant/components/volvooncall/__init__.py
+++ b/homeassistant/components/volvooncall/__init__.py
@@ -281,3 +281,8 @@ def device_state_attributes(self):
             self.instrument.attributes,
             model=f"{self.vehicle.vehicle_type}/{self.vehicle.model_year}",
         )
+
+    @property
+    def unique_id(self) -> str:
+        """Return a unique ID."""
+        return f"{self.vin}-{self.component}-{self.attribute}"
diff --git a/homeassistant/components/volvooncall/switch.py b/homeassistant/components/volvooncall/switch.py
index 5beea91c7e3461..da0f61c1d8f4ba 100644
--- a/homeassistant/components/volvooncall/switch.py
+++ b/homeassistant/components/volvooncall/switch.py
@@ -26,7 +26,9 @@ def is_on(self):
     async def async_turn_on(self, **kwargs):
         """Turn the switch on."""
         await self.instrument.turn_on()
+        self.async_write_ha_state()
 
     async def async_turn_off(self, **kwargs):
         """Turn the switch off."""
         await self.instrument.turn_off()
+        self.async_write_ha_state()