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1989 Mercury Cougar

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1989 Cougar.

Transmission Automatic 4-spd

The 1989 Mercury Cougar is a mid‑sized sedan built on the Ford Panther platform and powered by a 4‑speed automatic transmission; it requires 4.5 qt of 10W‑30 or 5W‑30 oil and averages 17 / 25 / 20 mpg EPA‑rated. With a modest 4‑speed automatic, the vehicle’s most notable specification is its fuel economy that balances city and highway mileage in a period when larger coupes were becoming less efficient. In terms of reliability, the Cougar’s 1989 model year sits at the lower end of the 1990‑2002 complaint range, with only 99 total owner complaints and a primary issue of vehicle speed control, suggesting a generally dependable platform with a modest recall history of four. This context indicates that while the 1989 Cougar was not a standout in durability, it maintained a relatively low complaint rate compared to later iterations of the model.

Model year2002 2001 2000 1999 1997 1996 1995 1994 1989

Quick specs

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

Engine oil capacity4.5 qtOEM · verified

Engine oil type10W-30 / 5W-30OEM · verified

EPA fuel economy17/25/20 mpgEPA · verified

Fitment & sizes

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

OE service part numbers OEM · verified

Thermostat

RT1053 discontinued

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

Transmission

Automatic 4-spd

Dimensions & weight NHTSA vPIC

Overall length	198.8 in
Overall width	72.8 in
Overall height	52.8 in
Wheelbase	113 in
Curb weight	3554 lb
Track (front / rear)	61.4 / 60.2 in
Weight distribution (front / rear)	57/43

Ratings & economy EPA / vPIC

EPA city / highway / combined	17 / 25 / 20 mpg
Drivetrain	Rear-Wheel Drive
Recommended fuel	Regular Gasoline

Service quick specs OEM factory data

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

This engine holds 4.5 qt of 10W-30 / 5W-30 engine oil, DOT 3 brake fluid.

Lubricants & capacities

Brake Fluid	DOT 3
Engine Coolant	ETHYLENE GLYCOL
Engine Oil	10W-30 · 5W-30
Engine Oil Capacity	4.5 qt

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 7,500 mi; spark plugs every 60,000 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 7,500 mi	Tire & Wheel Assembly (rotate)
Every 7,500 mi	Engine Oil (drain & refill) · Engine Oil Filter (replace)
Every 15,000 mi	Steering Linkage (inspect) · Suspension System (inspect) · Tire & Wheel Assembly (rotate)
Every 30,000 mi	Accessory Drive Belt (inspect) · Brake Linings (inspect) · Engine Air Filter Element (replace) · Engine Breather Filter (replace) · Engine Coolant System (drain, flush & refill) · Exhaust System Heat Shield (inspect)
Every 60,000 mi	Spark Plugs (replace)

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 1989 model year precedes the federal record arc that begins in 1990, positioning it at the generation’s inception with no earlier benchmark for comparison within the dataset. Against the 1990 baseline of 90 complaints and 3 recalls, the 1989 data reveals concentrated safety vulnerabilities: 15 crash-related complaints, 13 fire-related incidents, and significant clusters in vehicle speed control (19) and seat belts (17), suggesting acute early-production defects not reflected in the subsequent year’s aggregate metrics. The trend across 1990–2002 shows complaints generally escalating toward a 1999 peak of 521 incidents and 9 recalls, indicating systemic issues intensified as the generation aged, yet 1989’s specific double-digit crash and fire figures already signal substantial safety risk. Given these documented concentrations and the absence of recall data for 1989 against the consistent 1990–1993 recall pattern, this inaugural year presents elevated liability, making it a poor choice relative to later models in the run.

Open recalls

NHTSA campaigns

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

15 involved a crash · 13 a fire

Owner complaints by model year NHTSA · this generation & adjacent

’90 ’91 ’92 ’93 ’94 ’95 ’96 ’97 ’98 ’99 ’00 ’01 ’02

Owner complaints filed with NHTSA, by component

All 99 complaints on record, top 8 components.

Vehicle Speed Control19

Seat Belts17

Electrical System15

Engine & Engine Cooling9

Service Brakes, Hydraulic9

Equipment5

Power Train4

Exterior Lighting3

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 4 campaigns on record for this vehicle.

89V081000Service Brakes, Air:Disc:CaliperReported 19/05/1989

DUE TO CONTACT BETWEEN THE BRAKE CALIPER OF THE INBOARD FRONT WHEEL AND THE FRONT STABILIZER BAR, THERE MAY BE INCREASED BRAKE PEDAL TRAVEL FOLLOWING LOW SPEED TURNING MANEUVERS. Remedy: INSTALL ACORN TYPE FRONT SUSPENSION STRUT NUTS TO ELIMINATE STABILIZER BAR TO BRAKE CALIPER CONTACT.

89V080000Suspension:Rear:SpringsReported 19/05/1989

IMPROPERLY HEAT TREATED REAR SUSPENSION KNUCKLES COULD EXPERIENCE HIGH MILEAGE FATIGUE CRACKS AND EVENTUAL FRACTURE. Remedy: REPLACE KNUCKLES THAT HAVE THE AFFECTED LOT CODES.

Technical service bulletins NHTSA · verified

Showing 5 of 26 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
01156	2001-08-06	Visibility	SOME VEHICLES MAY EXHIBIT HEATER CORE LEAKS. *SLC
01157	2001-08-06	Unknown Or Other	INFORMATION REGARDING TRANSMISSION FLUID USAGE CHARTS. *SLC
002310	2000-11-13	Power Train	SUBJECT REGARDING CONTAMINATION FROM PRIOR TRANSMISSION CONCERNS OR EXCESS WEAR MAY BE…
0015	2000-01-10	Power Train	INFORMATION REGARDING THE NEW TRANSMISSION COOLER FLUSHER- SERVICE TIP. *MJS
99222	1999-10-18	Electrical System	SUBJECT ON A WIRE HARNESS TERMINAL REPAIR KIT AVAILABLE FOR REPAIRING ELECTRICAL WIRING…

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 Cougar. 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.

Vehicles taking 4.5 qt Thermostat RT1053

Reference guides

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

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

Frequently asked

How much oil does the 1989 Cougar take?

4.5 qt of ABOVE 0 degrees F 10W-30, BELOW 100 degrees F 5W-30, per the factory manual.

Does the 1989 Cougar have open recalls?

NHTSA lists 4 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the Cougar get?

EPA figures are 17 city / 25 highway / 20 combined mpg.