diff --git a/vehicle-data-platform/apps/web/src/domain/vehicleLookup.test.ts b/vehicle-data-platform/apps/web/src/domain/vehicleLookup.test.ts
index 864a9b89..15c86dbf 100644
--- a/vehicle-data-platform/apps/web/src/domain/vehicleLookup.test.ts
+++ b/vehicle-data-platform/apps/web/src/domain/vehicleLookup.test.ts
@@ -1,6 +1,6 @@
 import { describe, expect, test } from 'vitest';
 import type { QualityIssueRow } from '../api/types';
-import { qualityIssueVehicleLookup } from './vehicleLookup';
+import { isLikelyVIN, qualityIssueVehicleLookup } from './vehicleLookup';
 
 function issue(row: Partial<QualityIssueRow>): QualityIssueRow {
   return {
@@ -39,3 +39,13 @@ describe('qualityIssueVehicleLookup', () => {
     });
   });
 });
+
+describe('isLikelyVIN', () => {
+  test('accepts a 17-character VIN', () => {
+    expect(isLikelyVIN('LA9GG68L2PBAF4773')).toBe(true);
+  });
+
+  test('rejects phone-like lookup keys', () => {
+    expect(isLikelyVIN('64646848247')).toBe(false);
+  });
+});
diff --git a/vehicle-data-platform/apps/web/src/domain/vehicleLookup.ts b/vehicle-data-platform/apps/web/src/domain/vehicleLookup.ts
index f854eb52..92f9a9ab 100644
--- a/vehicle-data-platform/apps/web/src/domain/vehicleLookup.ts
+++ b/vehicle-data-platform/apps/web/src/domain/vehicleLookup.ts
@@ -5,6 +5,10 @@ export type VehicleLookup = {
   label: string;
 };
 
+export function isLikelyVIN(value?: string) {
+  return /^[A-HJ-NPR-Z0-9]{17}$/i.test(value?.trim() ?? '');
+}
+
 export function qualityIssueVehicleLookup(row: QualityIssueRow): VehicleLookup {
   const vin = row.vin?.trim();
   if (vin && vin !== 'unknown') {
diff --git a/vehicle-data-platform/apps/web/src/pages/VehicleDetail.tsx b/vehicle-data-platform/apps/web/src/pages/VehicleDetail.tsx
index adf9bace..d274ede1 100644
--- a/vehicle-data-platform/apps/web/src/pages/VehicleDetail.tsx
+++ b/vehicle-data-platform/apps/web/src/pages/VehicleDetail.tsx
@@ -5,6 +5,7 @@ import { api } from '../api/client';
 import type { QualityIssueRow, VehicleDetail as VehicleDetailData, VehicleSourceStatus } from '../api/types';
 import { PageHeader } from '../components/PageHeader';
 import { StatusTag } from '../components/StatusTag';
+import { isLikelyVIN } from '../domain/vehicleLookup';
 
 type VehicleQuery = {
   keyword: string;
@@ -73,6 +74,8 @@ export function VehicleDetail({
   const summary = detail?.realtimeSummary;
   const latest = detail?.realtime[0];
   const resolvedVIN = detail?.vin || summary?.vin || identity?.vin || latest?.vin || query.keyword;
+  const hasResolvedVIN = isLikelyVIN(resolvedVIN);
+  const displayVIN = hasResolvedVIN ? resolvedVIN : '-';
   const protocols = useMemo(() => detail?.sources ?? [], [detail?.sources]);
   const latestRaw = detail?.raw.items[0];
   const qualityCount = detail?.quality.total ?? 0;
@@ -98,8 +101,8 @@ export function VehicleDetail({
           <Space>
             <Button icon={<IconSearch />} htmlType="submit" theme="solid" type="primary">查询车辆</Button>
             <Button icon={<IconRefresh />} onClick={() => load(query)} loading={loading}>刷新</Button>
-            <Button onClick={() => onOpenHistory(resolvedVIN)}>查看历史</Button>
-            <Button onClick={() => onOpenMileage(resolvedVIN)}>查看里程</Button>
+            <Button disabled={!hasResolvedVIN} onClick={() => onOpenHistory(resolvedVIN)}>查看历史</Button>
+            <Button disabled={!hasResolvedVIN} onClick={() => onOpenMileage(resolvedVIN)}>查看里程</Button>
           </Space>
         </Form>
       </Card>
@@ -110,7 +113,8 @@ export function VehicleDetail({
             row
             data={[
               { key: '查询关键词', value: query.keyword },
-              { key: 'VIN', value: resolvedVIN },
+              { key: 'VIN', value: displayVIN },
+              { key: '解析状态', value: <Tag color={hasResolvedVIN ? 'green' : 'orange'}>{hasResolvedVIN ? '已解析 VIN' : '未解析到 VIN'}</Tag> },
               { key: '车牌', value: summary?.plate || identity?.plate || latest?.plate || '-' },
               { key: '手机号', value: summary?.phone || identity?.phone || '-' },
               { key: 'OEM', value: summary?.oem || identity?.oem || '-' },