Problems · NHTSA complaints

1999 Mercury Mystique problems

Owners filed 137 complaints about the 1999 Mercury Mystique with NHTSA between Mar 1999 and Oct 2012. The most-cited component is structure (29).

Complaints
137
Filed with NHTSA
Crashes
17
Reported by owners
Fires
1
Reported by owners
Injuries
17
People reported injured
Deaths
1
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Structure29
  2. Service brakes, hydraulic20
  3. Visibility17
  4. Engine and engine cooling15
  5. Electrical system14
  6. Air bags8
  7. Equipment7
  8. Fuel system, gasoline6
  9. Suspension6
  10. Vehicle speed control6
  11. Steering5
  12. Seat belts4
  13. Power train4
  14. Exterior lighting2

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

Data from NHTSA Complaints API · synced Nov 6, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
199911
200015
200114
200210
200318
200424
200517
20069
20079
20085
20093
20100
20111
20121

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Structure

29 reports1 crash
“I WAS DRIVING ALONG WHEN I COULD SMELL MY CAR GETTING HOT, SO I PULLED OVER AND SURE ENOUGH IT WAS OVERHEATING, BUT DID NOT SHOW INSIDE ON THE DASHBOARD, SO I HAD IT CHECKED AND THE PLASTIC HOUSING AROUND THE THERMOSTAT WAS CRACKED IN 3 PLACES, SO I SAY FIX IT ,THEY SAID IT WOULD BE 450.00, OK NO PROBLEM, THEN THEY CALLED BACK AND SAID THAT THE HOUSING WAS WELDED TO THE MANIFOLD AND THAT I WOULD HAVE TO REPLACE ALL FOR 1200.00 AND THAT THE HOUSING WASN'T MADE OF PLASTIC ANYMORE BECAUSE OF THIS PROBLEM. I THINK THIS SHOULD BE A RECALL AND FIXED FOR FREE. *TR”
Owner complaint to NHTSAFiled Oct 8, 2012Structure, EngineODI 10479223

Service brakes, hydraulic

20 reports4 crashes2 related recalls
“TL*THE CONTACT OWNS A 1999 MERCURY MYSTIQUE. THE BRAKE PEDAL EXTENDED TO THE FLOOR WHEN IT WAS DEPRESSED. THE CONTACT ATTEMPTED TO EXIT THE DRIVEWAY AT 2 MPH, BUT THE VEHICLE FAILED TO STOP. SHE HAD TO CONTINUOUSLY APPLY PRESSURE TO THE BRAKE PEDAL IN ORDER FOR THE VEHICLE TO STOP. SHE INSPECTED THE VEHICLE AND NOTICED BRAKE FLUID LEAKING FROM UNDERNEATH. SHE ALSO NOTICED THAT THE BRAKE LINE AND CHASSIS WERE EXCESSIVELY RUSTED. THE DEALER STATED THAT BECAUSE THERE WAS NO RECALL, THEY WOULD NOT ASSUME ANY FINANCIAL RESPONSIBILITY FOR THE REPAIR. THE VEHICLE HAS NOT BEEN REPAIRED. THE FAILURE AND CURRENT MILEAGES WERE 206,000. UPDATED 09/10/08. *LJ UPDATED 09/12/08. *JB”
Owner complaint to NHTSAFiled Jul 16, 2008Service brakes, hydraulicODI 10234509

Visibility

17 reports
“MY 1999 MERCURY MYSTIQUES DASH BOARD HAS COMPLETELY WARPED. IT HAS RENDERED THE DEFROSTER USELESS. I WAS NOT INFORMED OF ANY RECALL FOR THE DEFECT. I NOW UNDERSTAND THAT THE LINCOLN/MERCURY COMPANY DID ACKNOWLEDGE A DEFECT IN THE DASHBOARDS. WHAT REMEDY CAN I EXPECT ? *TR”
Owner complaint to NHTSAFiled Jul 27, 2007Visibility, StructureODI 10197655

Engine and engine cooling

15 reports1 fire
“MY HUSBAND AND I WAS DRIVING IN TRAFFIC FROM AN APPOINTMENT AND ALL OF A SUDDEN THE CAR STARTS SMOKING WITHIN A QUICK SECOND THE FRONT LEFT SIDE BURST INTO FLAMES, ELECTRICAL WINDOWS WOULDN'T WORK AND THE BRAKES FAILED, THE WE HAD TO RIDE TRAFFIC UNTIL WE COULD MOVE OVER TO THE CURVE AT THIS TIME THE EMERGENCY BRAKE HAD TO BE USED IN ORDER TO STOP THE CAR AND I HAD TO MOVE MYSELF OUT ON THE DRIVERS SIDE. *TR”
Owner complaint to NHTSAFiled Jan 2, 2009Engine and engine cooling, Electrical systemFire reportedODI 10253621

Electrical system

14 reports1 fire1 related recall
“I HAVE HAD A SHUTDOWN OF THE HEATER/AC FAN DUE TO MELTING OF THE WIRING HARNESS DESCRIBED BELOW. I REPLACED IT ONCE A COUPLE YEARS AGO AND IT JUST FRIED AGAIN. I WAS UNAWARE OF AN IDENTIFIED PROBLEM PRIOR TO THIS UNTIL I SAW THIS NO THE INTERNET. I LIVE IN THE DESERT AND IS CURRENTLY TRIPLE DIGIT TEMPERATURES AND IS IMPERATIVE I GET THIS FIXED. I CHECKED MY VIN NUMBER AND IT IS NOT INCLUDED ON THE RECALL LIST BUT FROM THE PRIOR EXPERIENCE I HAVE HAD WITH THIS PROBLEM IN MY CAR, I FEEL IT SHOULD BE ADDRESSED. CAN YOU HELP ME? SYMPTOMS> COMPLETE SHUTDOWN OF A/C, HEATING. FAN SYSTEM AND AN ODOR OF SOMETHING BURNED. LAST TIME THE HARNESS WAS FRIED AND THE HARNESS WAS REPLACED (BUT I DID NOT KNOW OF THIS PARTICULAR ISSUE THEN) BUT THE HEATER BLOWER RESISTER WAS NOT REPLACED. CAMPAIGN NUMBER: 01V230000 DATE: 2001-JUL-09 COMPONENT: ELECTRICAL SYSTEM DEFECT SUMMARY: ON CERTAIN MY 1996-1998 PASSENGER VEHICLES BUILT AT THE KANSAS CITY, CUAUTITLAN ASSEMBLY PLANTS OR ON MY 1999 PASSENGER VEHICLES BUILT AT THE AUTOMOTIVE ALLIANCE INTERNATIONAL ASSEMBLY PLANTS, THE ROUGH SURFACE OF THE HEATER BLOWER RESISTOR'S STAINLESS STEEL BLADES CAN DAMAGE THE COPPER SURFACE OF THE…”
Owner complaint to NHTSAFiled May 22, 2006Electrical system, EquipmentODI 10158017

Air bags

8 reports7 crashes
“A MINI VAN BROADSIDED A 4 DOOR SEDAN AND THE AIRBAGS DID NOT DEPLOY UNTILL AFTER THE VAN CAME TO A STOP, AND THE DRIVER TRIED TO OPEN DRIVER'S SIDE DOOR TO GET OUT. *AK”
Owner complaint to NHTSAFiled Jun 25, 2007Air bagsCrash reportedODI 10194181
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 6, 2026

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