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Newest reported 2004 Mercury Grand Marquis problems

 

Reported by bearmug and 82 others for the Mercury Grand Marquis

The car had 64600 miles on it and the headlights started going out while driving, which can be very dangerous. The problem is in the Light Control Module which is an expensive part (around $500 to $600 + labor).

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Verified for the Mercury Grand Marquis

The composite (plastic) intake manifold may crack near the thermostat housing and cause a coolant leak. Ford released an updated manifold that was reinforced to prevent a recurrence. No recall was issued for this problem but Ford did extend the warranty to seven years on some models from the date of purchase.

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Verified for the Mercury Grand Marquis
Transmission wear is common. Pieces of broken components are often discovered in the transmission oil pan when the transmission is serviced.
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