One problem related to transmission failure has been reported for the 2007 Mercury Mariner. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Mercury Mariner based on all problems reported for the 2007 Mariner.
Internal transmission failure; needs replacement transmission. Had done all factory recommended services when due including transmission flushes. Transmission should not have failed at this mileage, especially given the fact that car was serviced according to manufacturer specifications. Have had numerous other cars with substantially more mileage and no transmission issues.