很可能是水泵、或三通等管路渗漏（循环系统是封密的，缺失一定有原因）。发动机要勤查油位，烧油了要补充

来源: 于 2023-08-11 13:29:26 [旧帖] [给我悄悄话] 本文已被阅读：次

The most common reasons a Volkswagen Passat has a coolant leak are loose hose connections, a broken radiator, or a failed water pump.