However, air ducts and air-handling equipment require more space than pipes and pumps, ductwork is hard to seal, and leaks are difficult to detect. 然而，空气管和空气处理装置比起管道和泵需要更多空间，管道系统很难密封，泄漏很难发觉。
Inspectors said an air tube inside the model's engine may become disconnected because of substandard heat-resistant parts, which may harm driving safety. 据悉，召回原因是这些轿车发动机空气管的材质耐热性能不足，有可能影响行车安全。
