Problems owners report
Complaints filed with NHTSA about the 1998 Mercury Mountaineer, by the system named in each complaint. One complaint can name several.
- Tires95
- Vehicle speed control36
- Electrical system21
- Engine and engine cooling20
- Seats12
- Latches/locks/linkages12
- Structure11
- Suspension11
- Power train9
- Visibility7
NHTSA ODI complaints (public domain) · updated 23 Oct 2026 · 29 injuries and 1 deaths reported
Compared with other years
NHTSA ODI complaints by model year
Fatal crashes in the US
From 2020 to 2023, 11 1998 Mountaineer vehicles were involved in crashes on US public roads in which someone died; 8 people died inside them, and 4 of the vehicles rolled over. This is a count, not a crash rate: it grows with the number of cars on the road.
NHTSA Fatality Analysis Reporting System (FARS), crash years 2020–2023 (public domain)
New York safety inspections
At its first New York inspection the 1998 Mercury Mountaineer failed the safety check 0.59% of the time — 66% less often than the average 1998 passenger car (1.71%). Median odometer at inspection: 158,150 miles.
NY DMV Vehicle Inspections (vezn-fmmk), initial inspections since Aug 2021 · how we count
Recalls in Canada
1 Transport Canada recall for the 1998 Mercury Mountaineer.
| 2005028 14 Feb 2005 | Electrical On certain vehicles, the speed control deactivation switch may overheat, smoke, or burn, potentially resulting in an underhood fire. The condition may occur ei… |
Transport Canada Vehicle Recalls Database · Contains information licensed under the Open Government Licence – Canada
Recalls
ON CERTAIN SPORT UTILITY VEHICLES EQUIPPED WITH HIGH BACK SEATS, THE UPPER BOLT ON THE DRIVER'S SIDE HIGH BACK SEAT, THAT ATTACHES THE SEAT RECLINER MECHANISM TO THE SEAT BACK FRAME, COULD FRACTURE. IF THE BOLT FRACTURES AND DOES NOT JAM IN THE SEAT BACK FRAME, THE SEAT BACK MAY RECLINE UNTIL IT MAKES CONTACT WITH AN OBJECT BEHIND THE SEAT, SUCH AS THE SECOND ROW SEAT CUSHION.
VEHICLE DESCRIPTION: SPORT UTILITY VEHICLES EQUIPPED WITH 4.0L SOHC ENGINES AND STILL RETAIN THE ORIGINAL THROTTLE BODY (PART NUMBERS 97JF-9E926AB OR 97JF-9E926-AC). SOME OF THE ORIGINAL THROTTLE BODIES INSTALLED ALLOWED A GAP BETWEEN THE PLATE AND BORE TO BE BUILT TOO NARROW. THIS REDUCED CLEARANCE ALLOWED THE ENGINE DEPOSITS NORMALLY PRESENT IN THE THROTTLE BODY TO CONTACT OR BRIDGE THE GAP. IF THE ENGINE DEPOSITS BRIDGED THE GAP BETWEEN THE THROTTLE PLATE AND BORE AND THEN HARDENED, ON THE INITIAL APPLICATION OF THE ACCELERATOR PEDAL AFTER THE ENGINE HAS COOLED, THE OPERATOR WOULD NEED TO APPLY ADDITIONAL FORCE TO THE ACCELERATOR PEDAL TO BREAK THE BRIDGE.
VEHICLE DESCRIPTION: SPORT UTILITY VEHICLES. THE SECONDARY HOOD LATCH MAY CORRODE AT THE LATCH PIVOT AND STICK IN THE OPEN POSITION.
VEHICLE DESCRIPTION: CERTAIN 1997-1999 RHD EXPLORER EQUIPPED WITH 4.0L OHV/SOHC ENGINES AND CRUISE CONTROL BUILT FROM MAY 29, 1996 THROUGH MARCH 4, 1999; 1998-1999 EXPLORER/MOUNTAINEERS EQUIPPED WITH 4.0L OHV/SOHC OR 5.0L ENGINES OR 1998-1999 RANGERS EQUIPPED WITH 2.5L, 3.0L FFV/EFI OR 4.0L ENGINES AND CRUISE CONTROL BUILT FROM JANUARY 5, 1998 THROUGH MARCH 4, 1999; 1998-1999 MUSTANGS EQUIPPED WITH 3.8L, 4.6L 2-VALVE OR 4-VALVE ENGINES AND CRUISE CONTROL BUILT FROM MARCH 2, 1998 THROUGH MARCH 4, 1999; 1999 F250/F350/F450/F550 (OVER 8,500 LBS.) TRUCKS EQUIPPED WITH 5.4L OR 6.8L ENGINES AND CRUISE CONTROL BUILT FROM MARCH 2, 1998 THROUGH MARCH 4, 1999; AND 1999 F-53 STRIPPED CHASSIS EQUIPPED WITH 5.4L OR 6.8L ENGINES AND CRUISE CONTROL BUILT FROM MARCH 2, 1998 THROUGH MARCH 4, 1999. A CRUISE CONTROL CABLE CAN INTERFERE WITH THE SPEED CONTROL SERVO PULLEY AND NOT ALLOW THE THROTTLE TO RETURN TO IDLE WHEN DISENGAGING THE CRUISE CONTROL.
VEHICLE DESCRIPTION: MULTI-PURPOSE PASSENGER VEHICLES EQUIPPED WITH 4.0L SINGLE OVERHEAD CAM ENGINES. THE ENGINE FUEL LINES CAN BE DAMAGED IF THE VEHICLE IS JUMP STARTED AND THE GROUND CABLE IS ATTACHED TO THE FUEL LINE BRACKET THAT IS LOCATED NEAR THE BATTERY. SINCE THE BRACKET IS NOT GROUNDED, THE STAINLESS STEEL FUEL LINE BRAID COULD ACT AS A GROUND POTENTIALLY OVERHEATING THE PTFE INNER LINER OF THE FUEL LINE RESULTING IN DAMAGE TO THE FUEL LINE.
Whether a recall was fixed on a particular car is known only to the manufacturer: check the VIN at nhtsa.gov/recalls.
NHTSA recalls · summaries in NHTSA's own words
Service bulletins
What Mercury told its dealers about the 1998 Mercury Mountaineer: known faults, fixes and updates.
| Bulletin | Summary |
|---|---|
| 637928 | ON SOME VEHICLES, THE ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) BLOWS COLD AIR FROM THE FLOOR DUCTS ON VEHICLES PRODUCED BEFORE 9/30/2000 ONLY. *TT |
| 637922 | SOME VEHICLES BUILT PRIOR TO 9/15/2001 MAY EXHIBIT LOW LINE PRESSURE READINGS WHILE IN DRIVE, NO 2ND GEAR, NO 3RD GEAR, NO ENGINE BRAKING IN MANUAL 1ST AND SLIPPING SHIFTS AND / OR DELAYED ENGAGEMENTS. *TT |
| 637803 | CONCERNS WITH BRAKE VIBRATION, ROUGHNESS AND / OR GRINDING NOISE, AND EXCESSIVE BRAKE ROTOR CORROSION. *TT |
| 637755 | SOME VEHICLES MAY EXHIBIT A NO 1-2 UPSHIFT, NO 2-3 UPSHIFT, A NO ENGINE BRAKING CONDITION IN MANUAL 1 OR DIAGNOSTIC TROUBLE CODE P0732 (GEAR 2 INCORRECT RATIO) OR P0733 (GEAR 3 INCORRECT RATIO). *TT |
| 636326 | SOME VEHICLES MAY EXHIBIT A SQUEAK, SNAP, RATTLE, OR CLUNK IN THE FRONT END WHEN TURNING OR GOING OVER BUMPS. *TT |
| 636235 | EXPERIENCING A CLICKING / POPPING NOISE FROM THE UPPER STEERING COLUMN AREA WHEN TURNING THE STEERING WHEEL. *TT |
| 636065 | INFORMATION REGARDING DISCHARGED BATTERY CHARGING SERVICE TIPS AND GUIDELINES. *TT |
| 636056 | CERTAIN VEHICLES WITH 4X4 OR ALL-WHEEL DRIVE MAY HAVE A FLUID LEAK FROM THE FRONT AXLE VENT TUBE. *TT |
| 635998 | LOW LINE PRESSURE READING AT WIDE OPEN THROTTLE (WOT), SLIPPING SHIFTS AND / OR DELAYED ENGAGEMENTS WITH POSSIBLE DIAGNOSTIC TROUBLE CODES P0732, P0733, P1762 SET ON VEHICLES BUILT BEFORE 12/1/2001. *TT |
| 630636 | SOME VEHICLES EQUIPPED WITH THE 4.0L SOHC ENGINE MAY EXHIBIT A CHECK ENGINE LIGHT ON WITH DIAGNOSTIC TROUBLE CODES P0300 (RANDOM MISFIRE) OR P0301. *TT |
| 630515 | ENGINE OIL SYSTEM PRIMING PROCEDURES, SERVICE TIPS FOR REPORTS OF PREMATURE ENGINE FAILURE. *TT |
| 630418 | CONCERNS WITH REAR WIPERS THAT DO NOT SUFFICIENTLY CLEAN THE BACK GLASS. *TT |
| 630097 | INFORMATION REGARDING MALFUNCTION INDICATOR LIGHT ILLUMINATING WITH DIAGNOSTIC TROUBLE CODE P0300/P0301.*YH |
| 630018 | INFORMATION ON VEHICLES EXHIBITNG FUEL LINE DAMAGE DUE TO PINCHING/SQUEEZING OF THE FUEL RETURN LINE. *TT |
| 630001 | SOME ENGINE ASSEMBLIES WITH ALUMINUM CYLINDER HEADS REPAIRED IN-VEHILE HAVE BEEN FOUND TO LEAK COOLANT AND/OR OIL FROM THE CYLINDER HEAD GASKET AREA. *TT |
| 628153 | OWNER NOTIFICATION PROGRAM SUPPLEMENT 7 REVISED INFORMATION - REGARDING REPLACEMENT OF WILDERNESS AT TIRES. *TT |
| 627927 | SOME VEHICLES MAY EXHIBIT VACUUM OR AIR LEAKS IN THE INTAKE MANIFOLD AND / OR ENGINE SYSTEM CAUSING DIAGNOSTIC TROUBLE CODES P0171 AND OR P0174. *TT |
| 627774 | SOME IGNITION SWITCH LOCK CYLINDER ASSEMBLIES MAY EXHIBIT ROUGNESS AND / OR EXCESS EFFORT IN TURNING, KEY DOES NOT FULLY RETURN FROM START, A MALFUNCTION INDICATOR LAMP MAY ILLUMINATE WITH P0500, P1502 AND U1039 STORED IN POWERTRIAN CONTROL MODULE (PCM). *TT |
| 625794 | CONCERNS WITH HIGH BRAKE PEDAL FORCE TO STOP AFTER ROTOR MACHINING. *TT |
| 625715 | BRAKE SHIFT INTERLOCK.*JB |
| 624934 | ON SOME VEHICLES THE REAR WIPER ARM FAILS TO CLEAN BACK GLASS. *ET |
| 624668 | SOME VEHICLES MAY EXHIBIT AN INTERMITTENT HIGH FREQUENCY BRAKE SQUEAL NOISE. *YH |
| 623988 | INFORMATION REGARDING TRANSMISSION FLUID USAGE CHARTS. *SLC |
| 623944 | SOME VEHICLES MAY EXHIBIT HEATER CORE LEAKS. *SLC |
| 623810 | SUBJECT REGARDING OWNER NOTIFICATION PROGRAM 01M01 SUPPLEMENT #2: REVISED TECHNICAL INSTRUCTIONS AND NEW LABOR OPERATION. NLM |
NHTSA manufacturer communications (public domain)
NHTSA investigations
SPARK PLUG EJECTION FROM CYLINDER HEAD
ENGINE COMPARTMENT FIRES
FRONT SEAT BACK RECLINER ATTACHMENT
WINDSHIELD WIPER MALFUNCTION
STEERING KNUCKLE SEPARATIONS
VEHICLE HESITATION/STALLING
FUEL LINE DAMAGE FROM JUMP STARTING
NHTSA Office of Defects Investigation