Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1977 Grand Marquis.
The 1977 Mercury Grand Marquis serves as a precursor to the model's later tracked years, defined mechanically by its engine and engine cooling systems—the exact area flagged by its only recorded owner complaint. Logging just a single total owner complaint alongside one recall, this model year exhibits an exceptionally sparse defect record. When contextualized against the broader model complaint history spanning 1990 to 2011—which saw a peak of 487 complaints in 2005 and a low of 9 in 2011—the 1977 iteration sits firmly at the most reliable end of the spectrum, indicating to researchers that its early mechanical configuration was fundamentally sound and untouched by the widespread issues that would eventually plague the nameplate.
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
The 1977 Mercury Grand Marquis sits entirely outside the federal record provided, which begins in 1990. With only one engine complaint and one fire report on file, the 1977 model shows virtually no recorded issues—far fewer than any year in the 1990–2011 dataset, where complaints range from 61 to 487 annually. This suggests the 1977 is either exceptionally reliable or simply under-reported due to age. The overall trend in the later data shows a sharp rise in complaints and recalls peaking in the mid-2000s, followed by a decline, indicating that later generations had more documented problems. Because the 1977 has minimal federal record activity, it appears to be a low-risk buy from a safety/complaint standpoint, but the lack of data means you are relying on general vintage-car condition rather than any specific known issues.
All 1 complaints on record, top 1 components.
Source: NHTSA Office of Defects Investigation complaint database.
Showing 1 of 1 campaigns on record for this vehicle.
INTERCONTINENTAL AUTO PARTS IS RECALLING 1,937 FUEL FILTERS, P/NOS ALG 44/1 AND PUROLATOR F10024, SHIPPED BETWEEN JANUARY 14 AND FEBRUARY 13, 2008, SOLD FOR USE ON THE VEHICLES LISTED ABOVE. THE FILTER'S OUTLET CAP MAY… Remedy: INTERCONTINENTAL WILL REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGAN DURING MARCH 2008. OWNERS MAY CONTACT INTERCONTINENTAL AT 800-451-2593.
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
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Cross-vehicle references for the kinds of data on this page.
NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.