Problems · by component

2004 Mercury Grand Marquis exterior lighting problems

214 owner complaints to NHTSA about the 2004 Mercury Grand Marquis cite exterior lighting, 59% of all 360 complaints for this model year. NHTSA also lists 1 recall on this component.

Complaints
214
59% of all complaints
Crashes
2
Reported by owners
Fires
0
Reported by owners
Injuries
3
Reported by owners
01 —Owner reports

What owners say about the exterior lighting

Verbatim from NHTSA complaints, newest first
“The contact owns a 2004 Mercury Grand Marquis. The contact stated that while driving at an undisclosed speed, a local Police Officer stopped the vehicle and made the contact aware that both taillights were inoperable. No warning lights were illuminated. The vehicle was taken to a dealer to be diagnosed; however, the diagnostic result was unknown. The vehicle was serviced under an unknown recall; however, the failure persisted. The manufacturer was not notified of the failure. The failure mileage was unknown.”
Owner complaint to NHTSAFiled Aug 24, 2026Exterior lightingODI 11759060
“The contact owns a 2004 Mercury Grand Marquis. The contact received NHTSA Campaign Number: 15V861000 (Exterior Lighting). The contact stated that while driving at night, the headlights were flickering and became inoperable. Occasionally, the headlights operated as designed. There were no warning lights illuminated. The contact called the local dealer and was informed that the parts were not yet available. The vehicle was not diagnosed or repaired. The contact was an independent mechanic and used a module assembly repair kit to repair the vehicle, but the failure reoccurred. The manufacturer was contacted, but no additional assistance was provided. The failure mileage was approximately 116,000.”
Owner complaint to NHTSAFiled Aug 29, 2025Exterior lightingODI 11683841
“The contact owns a 2004 Mercury Grand Marquis. The contact stated while driving at an undisclosed speed at night, he became aware that the headlights were not functioning properly. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. After investigating the failure, the contact related the failure to Customer Satisfaction Program: 14N01. The manufacturer was notified of the failure but referred the contact to the NHTSA Hotline for assistance. The failure mileage was unknown. The VIN was not available.”
Owner complaint to NHTSAFiled Jun 26, 2024Exterior lightingODI 11596927
“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.”
Owner complaint to NHTSAFiled Nov 1, 2023Exterior lightingODI 11553076
“The headlight repair has been made but now the tail and park lights work intermittently. Most of the time not working but occasionally they will come on in colder weather. I think the problem is still in the Lighting control module. First appearance was last summer and has gotten worse. No other symptoms. Hazard ,turn signals, and brake lights all still work properly. Just no tail or park lights.”
Owner complaint to NHTSAFiled Sep 1, 2023Exterior lightingODI 11542089
“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.”
Owner complaint to NHTSAFiled Apr 12, 2023Exterior lighting, Latches/locks/linkagesODI 11516775

Showing 6 of 214 reports. Read every report on NHTSA.gov.

Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 9, 2026NHTSA vehicle page
02 —Related recalls

1 recall on this component

Exterior lighting: headlights

Free remedy

Ford Motor Company (Ford) is recalling certain model year 2003-2005 Ford Crown Victoria and Mercury Grand Marquis vehicles manufactured October 3, 2001, to August 2, 2005. The affected vehicles have a lighting control module (LCM) that may fail, resulting in a loss of headlights.

Exterior lightingReported Dec 22, 2015NHTSA 15V861000
Data from NHTSA Recalls API · synced Nov 9, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Other 2004 Grand Marquis problem areas