diff --git a/common/params_keys.h b/common/params_keys.h
index a5f0ae29f..1b06711a9 100644
--- a/common/params_keys.h
+++ b/common/params_keys.h
@@ -139,6 +139,7 @@ inline static std::unordered_map<std::string, ParamKeyAttributes> keys = {
     {"BlinkerMinLateralControlSpeed", {PERSISTENT | BACKUP, INT, "20"}},  // MPH or km/h
     {"BlinkerPauseLateralControl", {PERSISTENT | BACKUP, INT, "0"}},
     {"Brightness", {PERSISTENT | BACKUP, INT, "0"}},
+    {"CarList", {PERSISTENT, JSON}},
     {"CarParamsSP", {CLEAR_ON_MANAGER_START | CLEAR_ON_ONROAD_TRANSITION, BYTES}},
     {"CarParamsSPCache", {CLEAR_ON_MANAGER_START, BYTES}},
     {"CarParamsSPPersistent", {PERSISTENT, BYTES}},
diff --git a/sunnypilot/selfdrive/car/sync_car_list_param.py b/sunnypilot/selfdrive/car/sync_car_list_param.py
new file mode 100755
index 000000000..5e25f6da9
--- /dev/null
+++ b/sunnypilot/selfdrive/car/sync_car_list_param.py
@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+"""
+Copyright (c) 2021-, Haibin Wen, sunnypilot, and a number of other contributors.
+
+This file is part of sunnypilot and is licensed under the MIT License.
+See the LICENSE.md file in the root directory for more details.
+"""
+import json
+import os
+
+from openpilot.common.basedir import BASEDIR
+from openpilot.common.params import Params
+from openpilot.common.swaglog import cloudlog
+
+CAR_LIST_JSON_OUT = os.path.join(BASEDIR, "sunnypilot", "selfdrive", "car", "car_list.json")
+
+
+def update_car_list_param():
+  with open(CAR_LIST_JSON_OUT) as f:
+    current_car_list = json.load(f)
+
+  params = Params()
+  if params.get("CarList") != current_car_list:
+    params.put("CarList", current_car_list)
+    cloudlog.warning("Updated CarList param with latest platform list")
+  else:
+    cloudlog.warning("CarList param is up to date, no need to update")
+
+
+if __name__ == "__main__":
+  update_car_list_param()
diff --git a/sunnypilot/sunnylink/athena/sunnylinkd.py b/sunnypilot/sunnylink/athena/sunnylinkd.py
index a57b6ef55..3aeacf6a3 100755
--- a/sunnypilot/sunnylink/athena/sunnylinkd.py
+++ b/sunnypilot/sunnylink/athena/sunnylinkd.py
@@ -28,6 +28,7 @@ from websocket import (ABNF, WebSocket, WebSocketException, WebSocketTimeoutExce
                        create_connection, WebSocketConnectionClosedException)
 
 import cereal.messaging as messaging
+from openpilot.sunnypilot.selfdrive.car.sync_car_list_param import update_car_list_param
 from openpilot.sunnypilot.sunnylink.api import SunnylinkApi
 from openpilot.sunnypilot.sunnylink.utils import sunnylink_need_register, sunnylink_ready, get_param_as_byte, save_param_from_base64_encoded_string
 
@@ -279,6 +280,8 @@ def main(exit_event: threading.Event = None):
   sunnylink_api = SunnylinkApi(sunnylink_dongle_id)
   UploadQueueCache.initialize(upload_queue)
 
+  update_car_list_param()
+
   ws_uri = f"{SUNNYLINK_ATHENA_HOST}"
   conn_start = None
   conn_retries = 0
diff --git a/sunnypilot/sunnylink/params_metadata.json b/sunnypilot/sunnylink/params_metadata.json
index 3228fd0d6..707e0620f 100644
--- a/sunnypilot/sunnylink/params_metadata.json
+++ b/sunnypilot/sunnylink/params_metadata.json
@@ -125,6 +125,10 @@
     "title": "Car Battery Capacity",
     "description": ""
   },
+  "CarList": {
+    "title": "Supported Car List",
+    "description": "All supported platform in sunnypilot"
+  },
   "CarParams": {
     "title": "Car Params",
     "description": ""