2004 Mercury Grand Marquis Problems & Complaints

Most common 2004 Mercury Grand Marquis problems

• Lights~86,000 miles
  20960%
• Steering~85,000 miles
  6519%
• Electrical system~89,000 miles
  4011%
• Speed control & acceleration~50,000 miles
  237%
• Engine & cooling~100,000 miles
  134%
• Windows, wipers & sunroof~52,000 miles
  113%
• Transmission & drivetrain~17,000 miles
  93%
• Body & structure~65,000 miles
  82%
• Brakes~162,000 miles
  72%
• Wheels & tires~6,000 miles
  62%
• Air bags~65,000 miles
  62%
• Fuel & propulsion system~77,000 miles
  62%
• Suspension~33,000 miles
  31%
• Locks & latches~117,000 miles
  21%
• Other / not specified~85,000 miles
  21%
• Equipment & accessories~77,000 miles
  10%
• A/C & heater
  10%

Share of the 348 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.

Mercury Grand Marquis complaints by model year

Best Grand Marquis years: 2011, 2010, 2009. Years to avoid: 2005, 1997, 1996, 2003. Compare all years →

2004 Mercury Grand Marquis recalls (1)

NHTSA defect investigations

Federal safety investigators have looked into 5 possible defects involving the 2004 Mercury Grand Marquis:

What 2004 Mercury Grand Marquis owners say

Lights all 209 →

The contact owns a 2004 Mercury Grand Marquis. The contact stated while driving at an undisclosed speed, the exterior lighting became inoperable. The contact stated that the failure occurred at night which caused him to be on a dangerous dark road. The contact stated that due to the failure and his vision being impaired, the vehicle was driven into a ditch. The contact stated that he received several violation tickets from the local Police. The contact stated that a year ago the vehicle was serviced by the dealer under recall repair for the lighting control module. The contact stated that the failure had occurred twice after the recall repair was completed. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 212,000.

The contact's husband owns a 2004 Mercury Grand Marquis. The contact's husband had received notification of NHTSA Campaign Number: 15V861000 (Exterior Lighting). The vehicle was taken to a local dealer for the recall repair. The vehicle was repaired; however, the contact was made aware that only the light control module (LCM) module harness was replaced and not the light control module itself. The contact also stated that after the vehicle was returned, the driver's door latch was fractured, and the front passenger's side headlight failed to illuminate intermittently. The contact made the dealer aware of the failure and was informed that the cost of the repair was her responsibility. The manufacturer was made aware of the failure. The approximate failure mileage was 117,000.

Steering all 65 →

The contact owns a 2004 Mercury Grand Marquis. The contact stated that while driving at an undisclosed speed, the steering wheel was loose and made an abnormal sound while turning. The vehicle was taken to an independent mechanic, who diagnosed that the steering shaft was corroded, and the bearing had collapsed. The contact was informed that the steering shaft needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure but confirmed that there was no recall associated with the VIN. The failure mileage was approximately 116,000.

Catalytic converter FAIL, engine idles rough while in park. HIGH Loss of engine power while driving Differentials in back tires are imbalanced...timing FAIL. Steering not calibrated, drivetrain out of sync altogether. Back wheels, left and right; randomly spin & torque hard while car is already in motion on any private road, hidden road, domestic road and high capacity, high speed highway, causing vehicle to fishtail uncontrollably and dangerously, and wildly side to side potentially veering off the road which could result in death unless the driver regains proper control of vehicle. Out of sync car computer and the mechanical devices built into car do not have proper timing performed on those particular moving parts altogether. The car was not manufactured properly mechanically nor electrically altogether. Headlights & electric system etc have an incomplete recall on my vehicle. …

Electrical system all 40 →

The contact owns a 2004 Mercury Grand Marquis. The contact stated that while the vehicle was parked, the key fob became inoperable. The contact was not able to start the vehicle with the security warning light illuminated. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 90,000.

Catalytic converter FAIL, engine idles rough while in park. HIGH Loss of engine power while driving Differentials in back tires are imbalanced...timing FAIL. Steering not calibrated, drivetrain out of sync altogether. Back wheels, left and right; randomly spin & torque hard while car is already in motion on any private road, hidden road, domestic road and high capacity, high speed highway, causing vehicle to fishtail uncontrollably and dangerously, and wildly side to side potentially veering off the road which could result in death unless the driver regains proper control of vehicle. Out of sync car computer and the mechanical devices built into car do not have proper timing performed on those particular moving parts altogether. The car was not manufactured properly mechanically nor electrically altogether. Headlights & electric system etc have an incomplete recall on my vehicle. …

2004 Mercury Grand Marquis engines & fuel economy

EPA ratings. Class: Large car.