2005 Mercury Grand Marquis Electrical System Problems
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).
- 75electrical system complaints
- 74,000median miles at failure
- 4mention a crash
- 2mention an injury
- 1related recalls
- 45%of reports with a speed happened at 50+ mph
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.
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
| Model year | Electrical System complaints | Share of that year | Median miles |
|---|---|---|---|
| 2011 Grand Marquis | 3 | 33% | 105,200 |
| 2010 Grand Marquis | 3 | 12% | 28,000 |
| 2009 Grand Marquis | 4 | 15% | 41,000 |
| 2008 Grand Marquis | 9 | 11% | 57,600 |
| 2007 Grand Marquis | 1 | 1% | — |
| 2006 Grand Marquis | 8 | 6% | 66,000 |
| 2005 Grand Marquis | 75 | 15% | 74,000 |
| 2004 Grand Marquis | 40 | 11% | 88,670 |
| 2003 Grand Marquis | 51 | 14% | 95,100 |
| 2002 Grand Marquis | 10 | 13% | 37,499 |
| 2001 Grand Marquis | 13 | 8% | 83,770 |
| 2000 Grand Marquis | 17 | 10% | 68,000 |
| 1999 Grand Marquis | 15 | 9% | 130,000 |
| 1998 Grand Marquis | 15 | 10% | 102,250 |
| 1997 Grand Marquis | 12 | 4% | 144,362 |
| 1996 Grand Marquis | 16 | 7% | 106,243 |
| 1995 Grand Marquis | 20 | 11% | 86,000 |
When owners reported it
Related recalls (1)
Electrical system:12v/24v/48v battery:cables
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 hadnât 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…
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.
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…

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
- Exterior Lighting problems (293)
- Air Bags problems (67)
See all 2005 Mercury Grand Marquis problems or electrical system problems across all Grand Marquis years.