AI Damage1999 Mercury Marquis: common problems
Owners of the 1999 Mercury Marquis filed 24 complaints with NHTSA, most often about service brakes and vehicle speed control. Details by component below, with sources.
Key figures
- Owner complaints
- 24
- involving a crash
- 2
What fails most often
- 1 Service brakes 17% of all complaints
- 2 Vehicle speed control 17% of all complaints
- 3 Electrical system 13% of all complaints
- 4 Engine and cooling 13% of all complaints
- 5 Steering 13% of all complaints
- 6 Visibility 13% of all complaints
- 7 Equipment 8% of all complaints
- 8 Structure 8% of all complaints
- Service brakes: 4 complaints (17% of all).
- Vehicle speed control: 4 complaints (17% of all), 1 of them with a crash reported by the owner.
- Electrical system: 3 complaints (13% of all).
- Engine and cooling: 3 complaints (13% of all).
- Steering: 3 complaints (13% of all).
Symptoms owners describe
How many of the 24 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Service brakes | 4 | 0 | 0 |
| Vehicle speed control | 4 | 1 | 0 |
| Electrical system | 3 | 0 | 0 |
| Engine and cooling | 3 | 0 | 0 |
| Steering | 3 | 0 | 0 |
| Visibility | 3 | 0 | 0 |
| Equipment | 2 | 0 | 0 |
| Structure | 2 | 0 | 0 |
| Air bags | 1 | 1 | 0 |
| Electronic stability control | 1 | 0 | 0 |
| Exterior lighting | 1 | 0 | 0 |
| Fuel system | 1 | 0 | 0 |
| Latches, locks, linkages | 1 | 0 | 0 |
| Suspension | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
My mothers car was off & in park & all of a sudden the engine reved up and the car shot through her gargage door and almost through the back garage wall with my mom in the car.
Upon impact, driver's and the passenger's air bags did not deploy, resulting in injuries. Please provide further information and vin#.
Driving in the rain headlights went out tried high beans came on went out, also, wipers. I pull leaver held in reset wipers with other hand. Then I pull down lever to signal too get off road nocking high beans off again.
Tl - the contact owns a 1999 ford grand marquis. The contact stated while changing the passenger side rear tire the factory issued jack failed to support the weight of the vehicle and bent. The equipment was not taken to the dealer to be inspected. The manufacturer was not notified of the failure.
July 15,2005, I took my grand marquis l999, to glades ford because it was stalling as if it was going to cut off. I was told, spark plug #8 and the coil was bad. It was repaired at a cost of $337.94 . August 2005 had same problem and was told it was the manifold. Had this repaired ll.22.05,cost $960.63.
Dt*: the contact stated the fitting that connects the heater line to the intake manifold fractured and detached. As a result of the failure, the vehicle over heated. The contact saw steam coming from underneath the hood and pulled the vehicle over for inspection.
Dt keyless entry pad caught on fire,vehicle was in garage could spell smoke, had to disconnect the battery. Contacted the dealer said there is no recall, contacted the manufacturer said they couldn't do anything cause the vehicle is no longer under warranty.
It was related to corrosion. I will save the old part. If this had happened while negotiating a curve at highway speeds it could have been catistraffic or even worse.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 7,585 of 36,656 model years in the NHTSA data (top 21% most complained about).
On average one model year of the Marquis has 16 complaints (25 years in the data). This year has 24, above average.
What to check before buying
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
- Vehicle speed control. Accelerator pedal, cruise control, throttle codes.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
Other years of this model
- Marquis 198410 sources
- Marquis 19855 sources
- Marquis 19864 sources
- Marquis 19874 sources
- Marquis 19889 sources
- Marquis 198910 sources
- Marquis 19906 sources
- Marquis 19919 sources
- Marquis 199224 sources
- Marquis 199323 sources
- Marquis 199430 sources
- Marquis 199520 sources
- Marquis 199631 sources
- Marquis 199753 sources
- Marquis 199829 sources
- Marquis 200023 sources
- Marquis 200126 sources
- Marquis 200211 sources
- Marquis 200333 sources
- Marquis 200412 sources
Questions and answers
What are the most common problems with the 1999 Mercury Marquis?
Owner complaints to NHTSA most often mention: service brakes, vehicle speed control, electrical system. Total complaints: 24. The most frequent symptoms in complaint texts: A/C or heater (8%), rust, corrosion (8%), airbags did not deploy (4%).
How many service bulletins (TSB) were issued for the 1999 Mercury Marquis?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 1999 Mercury Marquis from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 1999 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.