Problems · by component

1998 Mercury Mystique engine and engine cooling problems

32 owner complaints to NHTSA about the 1998 Mercury Mystique cite engine and engine cooling, 14% of all 236 complaints for this model year.

Complaints
32
14% of all complaints
Crashes
2
Reported by owners
Fires
1
Reported by owners
Injuries
1
Reported by owners
01 —Owner reports

What owners say about the engine and engine cooling

Verbatim from NHTSA complaints, newest first
“1998 MERCURY MYSTIQUE. ELECTRICAL SUB-HARNESS CONNECTOR PROBLEMS. *SMD THE CONSUMER STATED HE TOOK THE VEHICLE TO HIS MECHANIC, BECAUSE THE AC WASN'T COOLING PROPERLY AND THE VEHICLE WOULD OVER HEAT, WHILE IT WAS ON. THE VEHICLE HAS TWO FANS IN THE FRONT AND THEY FOUND THE COOLING FAN MELTED AND THE SUB-HARNESS CONNECTOR BURNED UP. IN ADDITION, THEY SHOWED THE CONSUMER THE PART OF THE SUB-HARNESS WITH THE INSULATION JUST FALLING OFF THE WIRE. THEY HAD TO REPLACED THE FAN MOTOR UNIT AND HAD TO SPLICE IN A FAN CONNECTOR AND WIRE INTO THE REST OF THE SUB-HARNESS, BECAUSE FOR SAID THE SUB-HARNESS WAS OBSOLETE AND NOT AVAILABLE. WHILE IT FUNCTIONS, THE CHECK ENGINE LIGHT HAS SINCE ILLUMINATED FOR A CAM SHAFT POSITION SENSOR, WHICH THE CONSUMER WAS INFORMED IT WAS RELATED TO THE SUB-HARNESS. ALSO, THE LOWER CONTROL ARMS, BALL JOINTS, FRONT STRUTS, REAR STRUTS AND REAR MOUNTS, NUMEROUS O2 SENSORS, RADIO ANTENNA, RACK AND PINION, DRIVERS SIDE POWER WINDOW AND SWITCH CONTROLLER WERE ALL REPLACED. THE ENGINE AND TRANSMISSION MOUNTS ALSO HAD TO BE REPLACED. *JB”
Owner complaint to NHTSAFiled Sep 25, 2014Steering, Suspension, Engine and engine cooling, Power train, Electrical system, Visibility, EquipmentODI 10637913
“I HAVE HAD NUMEROUS FRONT END PROBLEMS. I HAVE HAD TO REPLACE FRONT TIE RODS TWICE IN A YEAR AND A HALF. HAVING PROBLEMS WITH STRUTS .CONTROL ARM BUSHINGS NEED TO CHANGED. ALSO STABILIZERS LINKAGE HAD TO BE CHANGED. HAVE ALSO PUT NEW BALL JOINTS IN. *TR”
Owner complaint to NHTSAFiled Oct 29, 2007Steering, Suspension, Engine and engine cooling, VisibilityODI 10207384
“AFTER ONLY OWNING MY VEHICLE FOR 8 MONTHS, AND BEING TOLD IT WAS IN PERFECT CONDITION, IN A MATTER OF 3 DAYS, MANY PROBLEMS OCCURRED. MY 4WD LIGHTS BEGAN FLASHING, ALONG WITH THE CHECK ENGINE LIGHT. WHEN ACCELERATING UPHILL, THE TEMPERATURE GAUGE RAISES TO HIGH IN A MATTER OF SECONDS AND THE CHECK GAUGE LIGHT COMES ON. THE CAR BEGAN DYING, THE IDLE DROPPING AT SLOW SPEEDS, AND EVEN DIED IN MID DRIVING DOWN THE HIGHWAY, LEAVING ME TO VEER TOWARDS THE EDGE OF THE ROAD WITH NO POWER STEERING. I TOOK THE CAR TO A DEALERSHIP, THAT WAS SUPPOSED TO HONOR MY EXTENDED WARRANTY, I PAID $1200 FOR. MY ESTIMATE CAME UP TO ALMOST $3000 WITH THE WARRANTY ONLY OPTING TO COVER $ 300. THE PROBLEMS AS DESCRIBED BY THE MECHANIC WERE: THROTTLE POSITION SENSOR: $680, SLACK IN BOTH LOWER BALL JOINTS (NEED REPLACING): $625, ELECTRICAL AND RELATED REPAIRS: $ 215, SENSOR FOR FRONT AND REAR INTERNAL FAILURE $ 700, T/CASE MOTOR $725. I COME TO FIND OUT THAT THE 4WD ON MY VEHICLE PURCHASED ONLY FOR THAT REASON WITH WINTER COMING DOESN'T EVEN WORK, THE WHOLE THING NEEDS REBUILT. I'VE NEVER EVEN USED IT. I PAID ALL I COULD $900, AND GOT THE CAR BACK JUST TO HAVE IT RESPONDING THE SAME WAY,…”
Owner complaint to NHTSAFiled Nov 10, 2005Suspension, Engine and engine cooling, Electrical system, Vehicle speed controlODI 10142445
“FAN STOPPED WORKING ON 1998 MERCURY MYSTIQUE, NO HEAT IN CAR. MOST LIKLY CAUSE IS THE RESISTOR ON THE HEATER BLOWER MOTER. THIS SHOULD BE COVERED ON FORD RECALLS 01S22 OR 01M07, BUT FORD WILL NOT FIX IT. FORD DID REPLACE THIS PART UNDER RECALL 99M07 ON 01/17/2001, THIS IS AN ON GOING ISSUE AND ALL MYSTIQUES SHOULD BE COVER UNDER 01M07.*AK”
Owner complaint to NHTSAFiled Dec 15, 2004Engine and engine coolingODI 10102996
“ENGINE BLEW ON A TRIP TO ST.LOUIS CAR WAS UNDER FORDS EXTENDED SERVICE PLAN BECAUSE I COULD NOT PRODUCE ALL OF MY ENGINE MAITANCE REPORTS EVEN THOUGH I TRIED TO EXPLAIN TO FORD THAT MANY TIMES I DID MY OWN OIL CHANGES THEY HAVE REFUSE TO HONOR THEIR EXTENDED SERVICE PLAN.”
Owner complaint to NHTSAFiled Jan 15, 2004Engine and engine coolingODI 10069054
“THE CHECK ENGINE LIGHT COMES ON AND STAYS ON. UPON SLOWING DOWN WHILE DRIVING AT HIGHWAY SPEEDS THE VEHICLE JERKS FORWARD. DEALERSHIP REPLACED THE EGR VALVE AND SENSOR 3 TIMES IN AN ATTEMPT TO CORRECT THE PROBLEM, BUT FAILED TO DO SO.*AK”
Owner complaint to NHTSAFiled Jan 2, 2004Engine and engine coolingODI 10052237

Showing 6 of 32 reports. Read every report on NHTSA.gov.

Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 6, 2026NHTSA vehicle page

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