Mitsubishi Motors Corp. has received an unusual warning from the government for what officials described as a "passive" stance regarding the recall of potentially defective cars.

The transport ministry is expected to inspect MMC shortly over the latest case, which concerns vehicles warranting recall for an extended period to November 2010 after MMC became aware of engine oil leaks in 2005.

The automaker has come under fire more than once for covering up consumer claims about potential defects since 2000.