diff --git a/openpilot/selfdrive/assets/icons_mici/usb.png b/openpilot/selfdrive/assets/icons_mici/usb.png
new file mode 100644
index 000000000..2f3afb0de
--- /dev/null
+++ b/openpilot/selfdrive/assets/icons_mici/usb.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:07bda2fe5d6be0b2854044053c384fe002e96406da119863a443b9344258b500
+size 1544
diff --git a/openpilot/selfdrive/ui/mici/layouts/home.py b/openpilot/selfdrive/ui/mici/layouts/home.py
index b567b405a..30d4a1945 100644
--- a/openpilot/selfdrive/ui/mici/layouts/home.py
+++ b/openpilot/selfdrive/ui/mici/layouts/home.py
@@ -140,6 +140,7 @@ class MiciHomeLayout(Widget):
     self._version_text = self._get_version_text()
 
     self._experimental_icon = IconWidget("icons_mici/experimental_mode.png", (48, 48))
+    self._usb_icon = IconWidget("icons_mici/usb.png", (62, 40))
     self._chestnut_icon = IconWidget("icons_mici/chestnut_green.png", (68, 40))
     self._chestnut_loading_icon = IconWidget("icons_mici/chestnut.png", (68, 40))
     self._chestnut_failed_icon = IconWidget("icons_mici/chestnut_orange.png", (68, 40))
@@ -152,6 +153,7 @@ class MiciHomeLayout(Widget):
       IconWidget("icons_mici/settings.png", (48, 48), opacity=0.9),
       NetworkIcon(),
       self._experimental_icon,
+      self._usb_icon,
       self._chestnut_icon,
       self._chestnut_loading_icon,
       self._chestnut_failed_icon,
@@ -251,7 +253,9 @@ class MiciHomeLayout(Widget):
 
     # ***** Center-aligned bottom section icons *****
     self._experimental_icon.set_visible(ui_state.experimental_mode)
-    self._chestnut_icon.set_visible(ui_state.chestnut_state in (ChestnutState.READY, ChestnutState.ACTIVE))
+    self._usb_icon.set_visible(ui_state.usb_connected and ui_state.usb_unknown)
+    self._chestnut_icon.set_visible(not ui_state.usb_unknown and (ui_state.usb_connected or
+                                    ui_state.chestnut_state in (ChestnutState.READY, ChestnutState.ACTIVE)))
     self._chestnut_loading_icon.set_visible(ui_state.chestnut_state == ChestnutState.LOADING)
     self._chestnut_loading_icon.set_opacity(0.35 + 0.65 * (0.5 - 0.5 * math.cos(rl.get_time() * 6.0)))
     self._chestnut_failed_icon.set_visible(ui_state.chestnut_state in (ChestnutState.UNCOMPILED, ChestnutState.FAILED))
diff --git a/openpilot/selfdrive/ui/ui_state.py b/openpilot/selfdrive/ui/ui_state.py
index c169cbeaf..ae1fad0b6 100644
--- a/openpilot/selfdrive/ui/ui_state.py
+++ b/openpilot/selfdrive/ui/ui_state.py
@@ -12,6 +12,7 @@ from openpilot.common.swaglog import cloudlog
 from openpilot.selfdrive.ui.lib.prime_state import PrimeState
 from openpilot.system.ui.lib.application import gui_app
 from openpilot.common.hardware import HARDWARE, PC
+from openpilot.common.hardware.usb import TYPEC_CC_ORIENTATION_PATH, get_usb_state, is_chestnut_usb_id, read_int
 from openpilot.selfdrive.modeld.helpers import chestnut_compiled
 
 BACKLIGHT_OFFROAD = 65 if HARDWARE.get_device_type() == "mici" else 50
@@ -90,6 +91,10 @@ class UIState:
     self.chestnut_compiled: bool = chestnut_compiled()
     self.chestnut_active: bool | None = None
     self.chestnut_loading: bool = False
+    self.usb_connected: bool = False
+    self.usb_connected_ts: float | None = None
+    self.usb_disconnected_ts: float | None = None
+    self.usb_unknown: bool = False
     self.chestnut_state = ChestnutState.DISCONNECTED
     self.started: bool = False
     self.ignition: bool = False
@@ -246,6 +251,23 @@ class UIState:
       self.chestnut_compiled = chestnut_compiled()
     self.chestnut_active = self.params.get("ChestnutActive")
     self.chestnut_loading = self.params.get_bool("ChestnutLoading")
+    now = time.monotonic()
+    if read_int(TYPEC_CC_ORIENTATION_PATH) != 0:
+      self.usb_disconnected_ts = None
+      if not self.usb_connected:
+        self.usb_connected = True
+        self.usb_connected_ts = now
+        self.usb_unknown = False
+      elif self.usb_connected_ts is not None and now - self.usb_connected_ts > 10.:
+        self.usb_unknown = not any(is_chestnut_usb_id(d["vendorId"], d["productId"], True) for d in get_usb_state())
+        self.usb_connected_ts = None
+    elif self.usb_connected:
+      if self.usb_disconnected_ts is None:
+        self.usb_disconnected_ts = now
+      elif now - self.usb_disconnected_ts > PARAM_UPDATE_TIME:
+        self.usb_connected = False
+        self.usb_connected_ts = None
+        self.usb_unknown = False
 
 
 class Device: