VehicleVerdict

1984 Mercury Grand Marquis problems

Verdict · NHTSA data

Limited data — recalls on file

NHTSA has just 24 complaints on file for the 1984 Mercury Grand Marquis — too few to judge reliability from owner reports alone — but 2 recall campaigns apply to this year, so any used example should have its VIN checked for completed recall work. Reports tied to this model year include 2 deaths and 1 injuries, per the complaint records themselves.

24

NHTSA complaints

2

Recalls

1

Investigations

2

Crash-involved

6

Fires reported

1

Injuries

2

Deaths

—

NCAP overall

How does 1984 compare to other Grand Marquis years?

Grand Marquis NHTSA complaints by model year, 1984 highlighted634 complaints1977: 1 complaints1978: 1 complaints1979: 0 complaints1980: 0 complaints1981: 2 complaints1982: 8 complaints1983: 14 complaints1984: 24 complaints1985: 29 complaints1986: 22 complaints1987: 57 complaints1988: 98 complaints1989: 69 complaints1990: 63 complaints1991: 106 complaints1992: 330 complaints1993: 178 complaints1994: 197 complaints1995: 222 complaints1996: 282 complaints1997: 370 complaints1998: 168 complaints1999: 202 complaints2000: 216 complaints2001: 207 complaints2002: 101 complaints2003: 449 complaints2004: 422 complaints2005: 634 complaints2006: 187 complaints2007: 111 complaints2008: 101 complaints2009: 35 complaints2010: 35 complaints2011: 11 complaints
Grand Marquis NHTSA complaints by model year, 1984 highlighted. Red bars are years to avoid.

See all Grand Marquis years to avoid →

What are the most common 1984 Mercury Grand Marquis problems?

ComponentComplaintsShare
Electrical System729%
Engine521%
Speed Control417%
Body & Structure313%
Other28%
Fuel System28%
Suspension14%

Does the 1984 Mercury Grand Marquis have recalls?

2 NHTSA recall campaigns on file. Recall repairs are free at franchised dealers.

07E064000Fuel SystemAugust 27, 2007 · 34,000 units

Defect

CERTAIN FEDERAL-MOGUL AFTERMARKET FUEL PUMPS SOLD UNDER THE BRAND NAMES OF CARTER, ACCUFLOW, NAPA, TRUFLOW, PARTS DEPO, AND PARTS MASTER, SHIPPED BETWEEN AUGUST 2006 AND JULY 2007 FOR USE ON THE VEHICLES LISTED ABOVE. THE FUEL PUMP DIAPHRAGM IN CERTAIN PRODUCTION RUNS MAY HAVE BEEN IMPROPERLY INSTALLED OR INADEQUATELY TESTED WHICH MAY CAUSE THE FUEL PUMP TO LEAK.

Consequence

A LEAKING FUEL PUMP COULD CREATE A VEHICLE FIRE HAZARD.

Remedy

FEDERAL-MOGUL WILL NOTIFY OWNERS AND REPLACE THE DEFECTIVE FUEL PUMPS FREE OF CHARGE. THE RECALL BEGAN ON OCTOBER 15, 2007. OWNERS CAN CONTACT FEDERAL-MOGUL AT 248-354-7700.

83V134000Seat BeltsDecember 20, 1983 · 530,000 units

Defect

THE BOLTS THAT ATTACH THE D-SHAPED RING FOR THE SHOULDER BELT ARE INADEQUATELY SUPPORTED BY THE MATERIAL IN WHICH THEY ARE MOUNTED. THE ATTACHMENT DOES NOT COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 210, "SEAT BELT ASSEMBLY ANCHORAGES".

Remedy

DEALERS WILL INSTALL NEW ATTACHING HARDWARE TO IMPROVE THE STRENGTH OF THE MOUNTING.

Consumer complaints filed with NHTSA

Representative excerpts, cleaned of personal information. These are consumer statements, not verified defects.

“DROVE 5 MILES, SHUT OFF ENGINE, RETURNED WITHIN 5 TO 6 MINUTES, FLAMES WERE COMING UP FROM UNDERHOOD IN AREA OF WINDSHIELD, FUEL INJECTED ENGINE. *AK”

Complaint filed with NHTSA · Electrical System · June 27, 1996 · fire

“CONSUMER HAD THE VEHICLE IN PARK, THEN PUT THE VEHICLE IN DRIVE, AND THE VEHICLE JUST TOOK OFF, CAUSING THE CONSUMER TO RUN IN A YARD AND WENT DOWN AN ENBANKMENT AND HIT A TREE. THE INSURANCE COMPANY CLAIM THAT THE THROTTLE GOT STUCK. *AK *ML”

Complaint filed with NHTSA · Speed Control · September 23, 1998 · crash

“THE CAR CONSTANTLY STALLS UPON TURNING, DECELERATION, AND BRAKING, CAUSING NEAR TRAFFIC ACCIDENTS. CAR WAS CHECK OVER FOR MALFUNCTION, BUT TO NO AVAIL.THE REAR OF THE CAR IS SAGGING VERY BADLY, CAUSING ME TO HAVE TO REPLACE THE REAR BUMPER AND TAILPIPE. THE HEIGHT OF THE CAR FROM GROUND TO FRAME IS…”

Complaint filed with NHTSA · Fuel System · November 6, 1998

1984 Mercury Grand Marquis — common questions

Is the 1984 Mercury Grand Marquis reliable?

The record is thin — 24 NHTSA complaints — so owner-report data can't strongly confirm reliability either way, though 2 recalls should be verified as completed.

What are the most common 1984 Grand Marquis problems?

According to NHTSA complaint data, the leading problem areas are electrical system (7 complaints), engine (5 complaints), speed control (4 complaints).

Does the 1984 Mercury Grand Marquis have recalls?

Yes — NHTSA lists 2 recall campaigns affecting the 1984 Mercury Grand Marquis. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.

Is the 1984 Mercury Grand Marquis under NHTSA investigation?

NHTSA opened one investigation into this model year; all are now closed.

Which Mercury Grand Marquis years should you avoid?

Based on complaint rates and open investigations, the Grand Marquis years to avoid are 2005, 2003, 2004, 1997, 1992, 1996, 1995, 2000, 2001, 1999, 1994, 2006, 1993, 1998. The cleanest record among Grand Marquis years belongs to 1980.

Related

Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.

Compiled by Sharon Ben-Moshe, Founder.