diff --git a/vehicle-data-platform/apps/api/internal/platform/mock_store.go b/vehicle-data-platform/apps/api/internal/platform/mock_store.go
index 55c3ef51..5393495b 100644
--- a/vehicle-data-platform/apps/api/internal/platform/mock_store.go
+++ b/vehicle-data-platform/apps/api/internal/platform/mock_store.go
@@ -32,12 +32,13 @@ func NewMockStore() *MockStore {
 }
 
 func (m *MockStore) DashboardSummary(context.Context) (DashboardSummary, error) {
+	kafkaLag := 0
 	return DashboardSummary{
 		OnlineVehicles: 3,
 		ActiveToday:    4,
 		FrameToday:     1286320,
 		IssueVehicles:  7,
-		KafkaLag:       0,
+		KafkaLag:       &kafkaLag,
 		Protocols: []ProtocolStat{
 			{Protocol: "GB32960", Online: 18, Total: 64},
 			{Protocol: "JT808", Online: 73, Total: 318},
diff --git a/vehicle-data-platform/apps/api/internal/platform/model.go b/vehicle-data-platform/apps/api/internal/platform/model.go
index db8d49d1..61b1394b 100644
--- a/vehicle-data-platform/apps/api/internal/platform/model.go
+++ b/vehicle-data-platform/apps/api/internal/platform/model.go
@@ -12,7 +12,7 @@ type DashboardSummary struct {
 	ActiveToday    int            `json:"activeToday"`
 	FrameToday     int            `json:"frameToday"`
 	IssueVehicles  int            `json:"issueVehicles"`
-	KafkaLag       int            `json:"kafkaLag"`
+	KafkaLag       *int           `json:"kafkaLag"`
 	Protocols      []ProtocolStat `json:"protocols"`
 	LinkHealth     []LinkHealth   `json:"linkHealth"`
 }
@@ -134,7 +134,7 @@ type QualityIssueRow struct {
 
 type OpsHealth struct {
 	LinkHealth       []LinkHealth `json:"linkHealth"`
-	KafkaLag         int          `json:"kafkaLag"`
+	KafkaLag         *int         `json:"kafkaLag"`
 	RedisOnlineKeys  int          `json:"redisOnlineKeys"`
 	TDengineWritable bool         `json:"tdengineWritable"`
 	MySQLWritable    bool         `json:"mysqlWritable"`
diff --git a/vehicle-data-platform/apps/api/internal/platform/production_store.go b/vehicle-data-platform/apps/api/internal/platform/production_store.go
index d4c7cec4..e937486a 100644
--- a/vehicle-data-platform/apps/api/internal/platform/production_store.go
+++ b/vehicle-data-platform/apps/api/internal/platform/production_store.go
@@ -385,8 +385,8 @@ func (s *ProductionStore) OpsHealth(ctx context.Context) (OpsHealth, error) {
 			{Name: "vehicle_realtime_snapshot", Status: "ok", Detail: "读取实时快照表"},
 			{Name: "vehicle_realtime_location", Status: "ok", Detail: "读取实时位置表"},
 			{Name: "TDengine raw_frames", Status: tdengineStatus(s.tdengine), Detail: tdengineDetail(s.tdengine)},
+			{Name: "Kafka lag", Status: "warning", Detail: "平台暂未接入 Kafka consumer lag 监控"},
 		},
-		KafkaLag:         0,
 		RedisOnlineKeys:  redisKeys,
 		TDengineWritable: s.tdengine != nil,
 		MySQLWritable:    mysqlStatus == "ok",
diff --git a/vehicle-data-platform/apps/web/src/api/types.ts b/vehicle-data-platform/apps/web/src/api/types.ts
index a9ae4ba6..a208d3ee 100644
--- a/vehicle-data-platform/apps/web/src/api/types.ts
+++ b/vehicle-data-platform/apps/web/src/api/types.ts
@@ -21,7 +21,7 @@ export interface DashboardSummary {
   activeToday: number;
   frameToday: number;
   issueVehicles: number;
-  kafkaLag: number;
+  kafkaLag: number | null;
   protocols: ProtocolStat[];
   linkHealth: LinkHealth[];
 }
@@ -124,7 +124,7 @@ export interface QualityIssueRow {
 
 export interface OpsHealth {
   linkHealth: LinkHealth[];
-  kafkaLag: number;
+  kafkaLag: number | null;
   redisOnlineKeys: number;
   tdengineWritable: boolean;
   mysqlWritable: boolean;
diff --git a/vehicle-data-platform/apps/web/src/pages/Dashboard.tsx b/vehicle-data-platform/apps/web/src/pages/Dashboard.tsx
index a3a407e1..ebdf2d2a 100644
--- a/vehicle-data-platform/apps/web/src/pages/Dashboard.tsx
+++ b/vehicle-data-platform/apps/web/src/pages/Dashboard.tsx
@@ -11,6 +11,10 @@ const statusColor: Record<string, 'green' | 'orange' | 'red' | 'grey'> = {
   error: 'red'
 };
 
+function formatLag(value?: number | null) {
+  return value == null ? '未接入' : value.toLocaleString();
+}
+
 export function Dashboard({ onOpenVehicle }: { onOpenVehicle: (vin: string) => void }) {
   const [summary, setSummary] = useState<DashboardSummary | null>(null);
   const [vehicles, setVehicles] = useState<VehicleRow[]>([]);
@@ -104,7 +108,7 @@ export function Dashboard({ onOpenVehicle }: { onOpenVehicle: (vin: string) => v
           </Col>
         </Row>
         <Card title="实时积压" bordered style={{ marginTop: 16 }}>
-          <Typography.Text>Kafka 当前消费积压：{summary?.kafkaLag ?? 0}</Typography.Text>
+          <Typography.Text>Kafka 当前消费积压：{formatLag(summary?.kafkaLag)}</Typography.Text>
         </Card>
         <Card title="车辆服务覆盖" bordered style={{ marginTop: 16 }}>
           <Form layout="horizontal" onSubmit={(values) => loadCoverage(values as Record<string, string>)} style={{ marginBottom: 12 }}>
diff --git a/vehicle-data-platform/apps/web/src/pages/Quality.tsx b/vehicle-data-platform/apps/web/src/pages/Quality.tsx
index 237ca149..3d970757 100644
--- a/vehicle-data-platform/apps/web/src/pages/Quality.tsx
+++ b/vehicle-data-platform/apps/web/src/pages/Quality.tsx
@@ -4,6 +4,10 @@ import { api } from '../api/client';
 import type { OpsHealth, QualityIssueRow } from '../api/types';
 import { PageHeader } from '../components/PageHeader';
 
+function formatLag(value?: number | null) {
+  return value == null ? '未接入' : value.toLocaleString();
+}
+
 export function Quality() {
   const [issues, setIssues] = useState<QualityIssueRow[]>([]);
   const [health, setHealth] = useState<OpsHealth | null>(null);
@@ -36,7 +40,7 @@ export function Quality() {
     <div className="vp-page">
       <PageHeader title="数据质量" description="断链、VIN 缺失、字段缺失和链路健康的排查入口" />
       <Row gutter={16}>
-        <Col span={8}><Card bordered title="Kafka Lag">{health?.kafkaLag ?? 0}</Card></Col>
+        <Col span={8}><Card bordered title="Kafka Lag">{formatLag(health?.kafkaLag)}</Card></Col>
         <Col span={8}><Card bordered title="Redis 在线 Key">{health?.redisOnlineKeys ?? 0}</Card></Col>
         <Col span={8}><Card bordered title="存储写入">{health?.tdengineWritable && health.mysqlWritable ? '正常' : '异常'}</Card></Col>
       </Row>