2005 Mercury Grand Marquis Electrical System Problems

Source: NHTSA · Updated Sep 16, 2026 · 75 complaints analyzed

Owners have filed 75 complaints with NHTSA about electrical system problems on the 2005 Mercury Grand Marquis, 15% of all complaints for this model year. Half of the reports with a mileage happened before 74,000 miles. The words owners use most often: “high beams” (19% of reports).

What owners describe

Phrases that appear unusually often in these complaints compared with complaints about other cars.

  • High beams: mentioned in 14 of 75 complaints (19%)
  • Lighting control: mentioned in 12 of 75 complaints (16%)
  • Low beam: mentioned in 7 of 75 complaints (9%)
  • Headlights went: mentioned in 6 of 75 complaints (8%)

At what mileage do electrical system problems happen?

Based on 60 complaints that reported the odometer reading.

Under 10k miles3 · 5%
10k–25k miles1 · 2%
25k–50k miles13 · 22%
50k–75k miles14 · 23%
75k–100k miles17 · 28%
100k–150k miles10 · 17%
150k+ miles2 · 3%

How serious are the reports?

Of 75 complaints, 4 mention a crash, 4 a fire, 2 an injury.

Mercury Grand Marquis electrical system complaints by model year

Peak: 2005, with 75 complaints
1995: 201995201996: 16161997: 121997121998: 15151999: 151999152000: 17172001: 132001132002: 10102003: 512003512004: 40402005: 752005752006: 882007: 1200712008: 992009: 4200942010: 332011: 320113

n = 312 complaints · Source: NHTSA

Model yearElectrical System complaintsShare of that yearMedian miles
2011 Grand Marquis333%105,200
2010 Grand Marquis312%28,000
2009 Grand Marquis415%41,000
2008 Grand Marquis911%57,600
2007 Grand Marquis11%—
2006 Grand Marquis86%66,000
2005 Grand Marquis7515%74,000
2004 Grand Marquis4011%88,670
2003 Grand Marquis5114%95,100
2002 Grand Marquis1013%37,499
2001 Grand Marquis138%83,770
2000 Grand Marquis1710%68,000
1999 Grand Marquis159%130,000
1998 Grand Marquis1510%102,250
1997 Grand Marquis124%144,362
1996 Grand Marquis167%106,243
1995 Grand Marquis2011%86,000

When owners reported it

Peak: 2014, with 14 complaints
2005: 2200522006: 222007: 3200732009: 222010: 7201072011: 772012: 112012112013: 772014: 142014142015: 992016: 2201622017: 442018: 1201812019: 112020: 1202012021: 112025: 120251

n = 75 complaints · Source: NHTSA

Related recalls (1)

Electrical system:12v/24v/48v battery:cablesNov 9, 2005 · NHTSA campaign 05V518000 · 98,836 vehicles

Problem: On certain passenger vehicles, the battery cable includes a fusible link that may contact and subsequently chafe on a #2 cross member attaching bolt.

Risk: This condition may result in heat damage and could lead to a fire.

Fix: Dealers will inspect the fusible link and position it away from the cross member bolt. If the fusible link has already chafed and copper wires have been exposed, the fusible link will be replaced. The recall began on november 18, 2005. Owners may contact ford at 1-800-392-3673, or lincoln/mercury at 1-800-521-4140.

What owners report

Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.

This is a serious safety hazard that could result in death or injury. If I hadn’t escaped in time, I would have been killed. I am urging the NHTSA to investigate this defect and take immediate action to remove these vehicles from the road. Others may not be as lucky. This issue is…

Received Mar 24, 2025 · NHTSA complaint 11650045

Neither the air conditioner nor the cruise has worked since 46,000 miles. It needs a new air compressor which would cost over $1,000 and there are several other complaints for this issue plastered all over the internet.

Received Apr 22, 2021 · NHTSA complaint 11413400

I purchased a 05 mercury grand marquis and had issues with the headlights going out while driving at night. I seen that there was a recall on this issue for my vehicle but when i called the ford dealer they said my car wasn't registered for a recall. They said i would have to pay $135 for a…

Received Jan 7, 2020 · NHTSA complaint 11297779
Mercury Grand Marquis
2003-2005 Mercury Grand Marquis photographed in College Park, Maryland , USA.. Representative photo; appearance varies by model year. Photo: IFCAR, Public domain, via Wikimedia Commons.

Frequently asked questions

Do all 2005 Mercury Grand Marquiss have electrical system problems?

No. NHTSA has 75 owner complaints about electrical system for the 2005 Mercury Grand Marquis (15% of the 488 complaints for this model year). Complaint data shows that the problem is reported, not how many of all cars sold are affected.

Was there a recall on the 2005 Mercury Grand Marquis electrical system?

Yes: 1 safety recall list electrical system. Check your VIN on NHTSA.gov to see whether the fix was done on your car.

At what mileage do electrical system problems start?

The median reported mileage is 74,000 miles: half of the reports with a mileage came before that.

What do owners say about electrical system problems on the 2005 Mercury Grand Marquis?

The most frequent phrase is “high beams”, in 14 of 75 complaints, followed by “lighting control” (12).

Other 2005 Mercury Grand Marquis problems

See all 2005 Mercury Grand Marquis problems or electrical system problems across all Grand Marquis years.