Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1978 Marquis.
The 1978 Mercury Marquis registers in historical datasets as a remarkably quiet entry in the nameplate’s reliability chronology, carrying zero recalls and a single documented owner complaint across its surveyed lifespan. That isolated grievance originates in the electrical system, constituting the sole catalogued deficiency in an otherwise blank corrective record. For archival research, this model year occupies the stable extreme of the dependability spectrum, functioning as a benchmark of manufacturing consistency where minimal factory intervention and scant consumer feedback indicate a high-water mark for the line’s trouble-free operation.
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
Federal records for the 1978 Mercury Marquis show a single complaint in the electrical system category, with zero crash or fire incidents reported. The provided year-by-year data only covers 1990 and 1991, revealing a slight upward trend in complaints from 8 to 9, but it lacks the years immediately before and after 1978 to establish a closer generational arc. Because the target year falls entirely outside this documented complaint window, it implies that widespread, systemic issues for the 1978 model are not reflected in the available dataset. The data does not specify the root cause of the lone electrical complaint. Given the negligible complaint volume and zero recalls or investigations, the 1978 Mercury Marquis appears to be a favorable used purchase, provided the electrical system is carefully inspected.
All 1 complaints on record, top 1 components.
Source: NHTSA Office of Defects Investigation complaint database.
No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
Decode factory build data for a specific vehicle by VIN.
Cross-vehicle references for the kinds of data on this page.
NHTSA lists 0 recall campaign(s) for this model year. Check your specific vehicle by VIN.