2005 Mercury Grand Marquis problems and complaints
Owners have filed 488 complaints with NHTSA about the 2005 Mercury Grand Marquis. The most-reported areas: Exterior Lighting (293), Electrical System (75), Air Bags (67).
Key takeaways
- 488 owner complaints on file with NHTSA.
- 24 involve a crash, 5 a fire, 21 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Exterior Lighting | 293 | 60% |
| Electrical System | 75 | 15% |
| Air Bags | 67 | 14% |
| Vehicle Speed Control | 39 | 8% |
| Seat Belts | 36 | 7% |
| Steering | 20 | 4% |
| Service Brakes | 17 | 3% |
| Structure | 11 | 2% |
| Hydraulic | 10 | 2% |
| Unknown Or Other | 9 | 2% |
| Engine And Engine Cooling | 9 | 2% |
| Visibility | 8 | 2% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2005 Mercury Grand Marquis 4-DR. | Not rated | Not rated | Not rated | Not rated |
| 2005 Mercury Grand Marquis 4-DR. w/SAB | Not rated | Not rated | Not rated | Not rated |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Exterior Lighting - filed 2026-09-16
The contact owns a 2005 Mercury Grand Marquis. The contact stated that while driving 60 MPH, the front headlights flickered on and off before turning off. The failure had occurred while the contact was driving at night. Upon inspecting the vehicle, the contact became aware of scorch marks on the LCM, and the relay swit...
Steering - filed 2026-05-08
The contact owns a 2005 Mercury Grand Marquis. The contact stated while attempting to make a left turn, the steering wheel failed to operate as intended causing the contact to have driven straight instead of turning. No warning light was illuminated. An independent mechanic was contacted. The vehicle was towed to an in...
Power Train,unknown Or Other - filed 2025-09-27
my vehicle was running fine, than all of a sudden the transmission would not shift, i was like omg, what is going on, i had my son with me, my son was driving, he was so scared, i was like take a side street, stay level ground, we coasted down pro tech, [XXX] , that is where the car is now, bill told us,my son and i t...
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More for the 2005 Mercury Grand Marquis
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.