Mercury Grand Marquis owners have reported 2 problems related to frame rust (under the structure category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Mercury Grand Marquis based on all problems reported for the Grand Marquis.
The contact owns a 2000 Mercury Grand Marquis. While the vehicle was undergoing routine maintenance, the independent mechanic discovered that the entire subframe was rusted and corroded. The cause of the failure was not diagnosed or repaired. The manufacturer was notified and did not assist. The local dealer was not notified. The failure mileage was 57,000.
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The contact owns a 2008 Mercury Grand Marquis. While driving approximately 35 mph, the steering wheel seized. The vehicle was taken to the dealer who diagnosed that the upper intermediate steering shaft failed. The vehicle was repaired. In addition, the mechanic discovered that the subframe was rusted and corroded. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 66,000.
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