diff --git a/server/telemetry/data.py b/server/telemetry/data.py
index 874dcc2..0578696 100644
--- a/server/telemetry/data.py
+++ b/server/telemetry/data.py
@@ -48,6 +48,11 @@ class TelemetryData:
     car_name: str = ""
     car_class: str = ""
 
+    # --- 通用扩展命名空间 ---
+    # 供非游戏类数据源（车辆诊断、工业设备等）携带自定义字段，避免污染核心模型。
+    # 例: {"battery_voltage": 13.9, "dtcs": ["P0043"], "bus_stats": {...}}
+    extra: dict[str, Any] = field(default_factory=dict)
+
     raw: dict[str, Any] = field(default_factory=dict)
 
     def to_dict(self) -> dict[str, Any]:
@@ -82,4 +87,5 @@ class TelemetryData:
             "torque": self.torque,
             "car_name": self.car_name,
             "car_class": self.car_class,
+            "extra": self.extra,
         }