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1998 Mercury Mystique

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1998 Mystique.

Body PASSENGER CAR

The 1998 Mercury Mystique is a passenger car from the model’s 1994–2002 production run that requires 5.8 quarts of 5W-20 API engine oil. With 257 owner complaints and 11 recalls on record—driven primarily by suspension issues—this model year sits between the line’s 1994 low of 2 complaints and the 1995 high of 409, placing it in the middle tier of the nameplate’s reliability history. That positioning indicates a vehicle that escaped the minimal defect rates of its debut year but still accumulated enough documented faults to warrant careful inspection by researchers tracking systemic wear patterns across the Mystique’s lifecycle.

Model year2000 1999 1998 1997 1996 1995

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity5.8 qtOEM · verified

Engine oil type5W-20 APIOEM · verified

Lug nut torque94 ft-lbsOEM · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 40R · 590 CCA battery. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 40R · 590 CCAOEM · verified

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length	184.6 in
Overall width	69.3 in
Overall height	54.3 in
Wheelbase	106.7 in
Curb weight	2813 lb
Track (front / rear)	58.7 / 57.9 in
Weight distribution (front / rear)	65/35

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 5.8 qt of 5W-20 API engine oil, DOT 3 brake fluid. Torque lug nuts to 94 ft-lbs, the oil drain plug to 19.0 ft-lbs. The firing order is 1-4-2-5-3-6. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Lubricants & capacities

Brake Fluid	DOT 3
Engine Coolant	ETHYLENE GLYCOL
Engine Oil	5W-20 · API
Engine Oil Capacity	5.8 qt

Engine torques

Camshaft Sprocket and/or Gear Bolt(s)	47.0-53.0 ft-lbs
Crankshaft Pulley and/or Damper Bolts	88 ft-lbs
Intake Manifold to Engine Bolts	12.0-15.0 ft-lbs
Exhaust Manifold to Cylinder Head Bolts	13.0-16.0 ft-lbs
Intake Manifold to Engine Bolts	7.4 ft-lbs
Exhaust Manifold to Cylinder Head Bolts	15.0 ft-lbs
Engine Oil Pan Drain Plug	18.0-22.0 ft-lbs
Engine Oil Pan Drain Plug	19.0 ft-lbs

Chassis torques

Lug Nuts	94 ft-lbs
Front Wheel Hub	199 ft-lbs
Rear Wheel Hub	210 ft-lbs

Ignition

Cylinder Firing Order	1-3-4-2
Cylinder Firing Order	1-4-2-5-3-6
Curb Idle Speed (No Load)	MT: 880, AT: 800 rpm
Curb Idle Speed Variance (No Load)	25 rpm
Curb Idle Speed (No Load)	MT: 720, AT: 770 rpm
Curb Idle Speed Variance (No Load)	25 rpm
Spark Plug Manufacturer	Motorcraft
Spark Plug Gap	0.056-0.056 in

Battery & A/C

Refrigerant	R134a
Refrigerant Capacity	1.63 lbs
Oil Group	PAG
Oil Type	46
Oil Capacity	7.00 oz
Standard BCI Group Number	40R
Standard BCI Cranking Performance	590 cca
Standard BCI Group Number	40R

Service checks

Pressure Test	13-18 psi
Radiator Cap Pressure Relief	13-18 psi
Thermostat Opening Temperature	187-194 °F
Key ON Engine OFF (KOEO)	30.0-45.0
Regulated Fuel System Pressure (With Vacuum)	45.0-60.0 psi

Brakes

Brake Application	WITH REAR DISC / WITH STANDARD
Torque Caliper to Bracket	30 ft-lbs / 88 ft-lbs
Torque to Knuckle	43 ft-lbs / 85-105 ft-lbs
Minimum Pad Thickness	Front: 0.125; Rear: 0.125 in
Brake Application	WITH REAR DISC / WITH STANDARD
Rotor Max Parallel Variation	0.0006 in
Rotor Runout Limit	0.003 in / 0.006 in
Rotor Nominal Thickness From	0.79 in / 0.95 in

Multi-step torque procedures OEM · verified

Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages

37 ft. lbs., step 2: 90

37 ft. lbs

Cylinder Head — tightening sequence 3 stages

Prep Do not reuse old bolts. Coat bolt threads with clean engine oil.

1	18.0 ft. lbs.	18 ft. lbs
2	33.0 ft. lbs.	33 ft. lbs
3	105 degrees	105 degrees

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 5,000 mi; coolant every 30,000 mi. The big-interval services (every 30,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

At 5,000 mi	Tire & Wheel Assembly (rotate)
Every 5,000 mi	Engine Oil (drain & refill) · Engine Oil Filter (replace)
Every 10,000 mi	Brake System (inspect) · Tire & Wheel Assembly (rotate)
Every 15,000 mi	Engine Coolant System (leak inspection)
Every 20,000 mi	Cabin Air Filter (replace)
Every 30,000 mi	Engine Air Filter Element (replace) · Engine Coolant System (drain, flush & refill) · Exhaust System Heat Shield (inspect)
At 50,000 mi	Engine Coolant System (drain, flush & refill)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

The 1998 Mercury Mystique sits at a troubling inflection point in this generation's federal record. After the early-life crisis of 1995 (409 complaints, 11 recalls), the Mystique showed steady improvement through 1996 and 1997, with complaints falling to a mid-generation low of 88 and recalls down to 7 — suggesting Ford was getting the platform's problems under control. The 1998 model year abruptly reversed that trajectory: complaints surged nearly threefold to 257, recalls jumped back to 11 (matching the 1995 peak), and investigations hit their highest level of the entire generation at 7, while TSBs climbed to a generation-high 248. The top complaint areas — suspension (47), engine and cooling (28), powertrain (28), and electrical (24) — are broad rather than narrowly defined, and the data does not specify root causes for any of them, but the breadth suggests systemic rather than isolated issues. The fact that 1999 saw complaints drop back to 140 and recalls fall to 4 indicates that 1998 was a genuine outlier rather than a new baseline, but that does little for owners of the target year. With 9 crash complaints and 8 fire complaints on record, this is one of the least appealing model years in the generation and is not recommended for purchase without a thorough inspection of the suspension, cooling, and electrical systems at minimum.

Open recalls

NHTSA campaigns

248

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

257

Owner complaints

9 involved a crash · 8 a fire

Owner complaints by model year NHTSA · this generation & adjacent

’94 ’95 ’96 ’97’98’99 ’00 ’01 ’02

Owner complaints filed with NHTSA, by component

All 257 complaints on record, top 8 components.

Suspension47

Engine & Engine Cooling28

Power Train28

Electrical System24

Service Brakes, Hydraulic17

Exterior Lighting15

Air Bags13

Vehicle Speed Control11

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 11 campaigns on record for this vehicle.

08E033000SuspensionReported 14/04/2008

FEDERAL MOGUL IS RECALLING 6,903 AFTERMARKET BALL JOINT ASSEMBLIES SHIPPED BETWEEN NOVEMBER 9, 2007 AND MARCH 26, 2008, WHICH MAY HAVE BEEN PACKAGED WITH INCORRECT NUTS. THE PART NUMBERS PACKAGED WITH INCORRECT NUTS… Remedy: FEDERAL MOGUL WILL NOTIFY OWNERS AND REPLACE THE PARTS FREE OF CHARGE. THE RECALL BEGAN ON MAY 22, 2008. OWNERS CAN CONTACT FEDERAL MOGUL AT 877-489-6659.

06E022000Service Brakes, HydraulicReported 13/03/2006

CERTAIN AFTERMARKET BRAKE HYDRAULIC MASTER CYLINDERS SOLD AS REPLACEMENT BRAKE CYLINDERS FOR CERTAIN FORD, DAIMLERCHRYSLER, AND JEEP PASSENGER VEHICLES. THESE BRAKE CYLINDERS WERE SOLD UNDER THE BRAND NAMES OF NAPA… Remedy: AFFINIA (BRAKE PARTS, INC.) WILL REPLACE THE SUBJECT BRAKE HYDRAULIC MASTER CYLINDERS FREE OF CHARGE. THE RECALL BEGAN ON MARCH 20, 2006. OWNERS CAN CONTACT AFFINA GROUP CUSTOMER…

Technical service bulletins NHTSA · verified

Showing 5 of 248 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
042107	2004-12-13	Power Train	GENERAL (PCM) POWER TRAIN CONTROL MODULE PROGRAMMING PROCEDURES. *TT
04217	2004-11-01	Power Train	GENERAL POWER TRAIN CONTROL MODULE (PCM) PROGRAMMING PROCEDURES. *TT
041516	2004-08-09	Electrical System	MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED WITH DIAGNOSTIC TROUBLE CODE(S) P0420 AND/OR…
041814	2004-01-01	Steering	STEERING COLUMN SHIPPED WITHOUT CRUSH PAD - REUSE ORIGINAL CRUSH PAD IF NOT DAMAGED. *TT
03203	2003-10-13	Electrical System	MALFUNCTION INDICATOR LAMP ILLUMINATED WITH DIAGNOSTIC TROUBLE CODES (DTCS) P0442, P0455…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420

Catalyst system efficiency below threshold — Bank 1

P0300

Random / multiple cylinder misfire detected

P0171

System too lean — Bank 1

P0455

Evaporative emission system leak detected — large leak

P0128

Coolant thermostat below regulating temperature

P0442

Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN

Decode a VIN to confirm the transmission and build data for a specific Mystique. OEM

Build data

Plant, GVWR class, engine and body data for any 17-character VIN.

Recalls

Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Group 40R battery Vehicles taking 5.8 qt

Reference guides

Cross-vehicle references for the kinds of data on this page.

Vehicle recalls & TSBs OBD-II trouble codes Torque specifications Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 1998 Mystique take?

5.8 qt of 5W-20 API, per the factory manual.

Does the 1998 Mystique have open recalls?

NHTSA lists 11 recall campaign(s) for this model year. Check your specific vehicle by VIN.