Which parts fail
Components named in complaints (buckles, retractors, anchors and pretensioners).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2005 Mercury Grand Marquis owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2005 Mercury Grand Marquis. The contact stated that on numerous occasions while the vehicle was started, the driver's side air bag warning light intermittently illuminated. The vehicle was taken to the dealer where it was diagnosed with a driver's air bag pretensioner fault and that the seat belt pretensioner needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 40,842.
Passenger seat belt pre-tensioner has malfunctioned. Air bag check light flashing code 34. My mechanic informs me the entire SRS will not function in a crash. He was informed by Ford that a replacement part is no longer available. The vehicle mileage is around 43,000. No rust and no collision damage. With the numerous complaints about this same problem why hasn't a safety recall be issued? Why hasn't Ford been required to stock replacement parts for a longer time?
Seat belt does not fully clip in to buckle and tends to come undone while in operation of motor vehicle furthermore requires occupant to wiggle buckle back and forth to attempt to get a good connection between the two, belt and buckle.
Hello, I own a 2005 Mercury Grand Marquis and have been experiencing an apparent problem with the air bag / seatbelt system. There is a light that is on that says airbag. I had it checked out by my local mechanic who said it was likely a seatbelt tensioner per the code in the computer. After doing some research online, I discovered that there were pages of people with similar problems. A working replacement could not be installed as these parts are numbered to the car and have to be repaired and reprogrammed. Dealers have quoted over $500+ for the repair, per my research. Given the amount of people just on the forums, for many years and mileages of this car, just for this problem. There is an apparent problem with Ford's s q.c. From the start. …
This started out with lights and windshield wipers cutting off and on with no apparent wearing. Also burning smell. Took it in got that fixed. I was informed this had occurred in others same exact thing. Right after that next thing was dash lights for ABS, airbag, and anti skid stay on. I took it to 2 places. Was told it was a module unit by one place the other couldn't find a reason. I have not had it fixed since I couldn't get a clear reason for it, also the car runs fine. The lights must mean something. I'm going to sell it but need to get as much a possible for it and this will take away from the buying price. Need to fix but was told the module unit repair seems strange. Please help any advice would be helpful. Thank you
Car failed safety inspection due air bag warning light on. Diagnosis indicated that the driver's seat belt pretensioner had failed, and air bag would not inflate in a crash. The pretensioner had to be replaced. This seemed like a premature failure, as the car has only 47924 miles. The service desk person at the dealer said that this was very common in Mercury Grand Marquis. I did some checking on the internet and found that he was correct, according to all of the reports exactly like mine. In virginia a car fails for this light being on. I'm not sure about other states. In view of the frequency of this problem, I feel there should be a recall.
Tl* the contact owns a 2005 Mercury Grand Marquis. The contact stated that the air bag warning indicator illuminated. The vehicle was taken to an independent mechanic where it was diagnosed that the seat belt pretensioners on the front driver and passenger sides malfunctioned and the seat belt assembly would need to be replaced. Griffith Ford seguin (I-10 frontage rd, seguin, tx) stated that there were no recalls on the vehicle and any repair would be at the contact's expense. The manufacturer was notified of the failure and referred the contact to NHTSA. The failure mileage was approximately 21,000.
Tl* the contact owns a 2005 Mercury Grand Marquis. While driving at various speeds, the air bag warning light illuminated. The vehicle was taken to a dealer where it was diagnosed that the air bag pretensioner failed. As a result, the seat belt retractor assembly needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 51,000. The VIN was not available. Updated 7/16/15 the consumer stated the parts have not been in stock since 10-10-14. Updated 07/23/15
Airbag fault code 34. Passenger side seatbelt pretensions circuit resistance outside limits. Circuit was damaged by static discharge from human to outside of door. Vehicle was parked during both incidents. No accident. No detonation of explosive charge. Same problem occurred 2 years ago on driver side with code 33. Numerous reports from other consumers. Please inquire to repair facility 'safetyrestore dotcom' for number of these failures. Airbags are inop when fault occurs. Need shielded circuit to prevent reoccurrence.
Tl* the contact owns a 2005 Mercury Grand Marquis. The contact stated that the seat belts failed to function properly in the vehicle. In addition, the air bag warning light remained illuminated. The vehicle was included in NHTSA campaign number: 15V861000 (exterior lighting). The vehicle had not yet been diagnosed by a dealer. The manufacturer was notified of the failure and the contact was waiting for a response to schedule a repair solution with a dealer. The approximate failure mileage was 70,000.
Seat Belt complaints in other Grand Marquis years
Frequently asked questions
How common are seat belt problems on the 2005 Mercury Grand Marquis?
NHTSA has 36 complaints about the seat belts of the 2005 Mercury Grand Marquis, 7% of the model year's 488 complaints. The component named most often is front › retractor (1 mentions).
Is there a recall for 2005 Mercury Grand Marquis seat belt problems?
No. NHTSA lists no seat belts recall for the 2005 Mercury Grand Marquis, though it has 4 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2005 Mercury Grand Marquis seat belt problems start?
Half of the complaints with a recorded mileage happened before about 51,000 miles, and 6% before 25,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.