MercuryCougar1988Overview/mercury/cougar/1988/base/

1988 Mercury Cougar

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1988 Cougar.

The 1988 Mercury Cougar comes with a 4.5‑quart oil system that calls for 10W‑30 or 5W‑30 viscosity, reflecting its period‑appropriate powertrain. Owner‑reported data show 69 total complaints for the model year, with seat‑belt issues leading the list and a single recall issued. Across the broader 1990‑2002 Cougar lineage, complaint volumes swing from a low of one in 1998 to a high of 521 in 1999, placing the 1988 edition well below the peak but noticeably above the minimum. This positioning suggests the 1988 model is relatively reliable for its era, though the seat‑belt focus warrants attention.

Model year200220012000199919971996199519941988

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

Fitment & sizes

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

OE service part numbers OEM · verified

ThermostatRT1052 discontinued · alt RT1053

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length200.8 in
Overall width71.3 in
Overall height53.9 in
Wheelbase104.3 in
Curb weight3236 lb
Weight distribution (front / rear)56/44

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 FluidDOT 3
Engine CoolantETHYLENE GLYCOL
Engine Oil10W-30 · 5W-30
Engine Oil Capacity4.5 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; 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 miTire & Wheel Assembly (rotate)
Every 7,500 miEngine Oil (drain & refill) · Engine Oil Filter (replace)
Every 15,000 miPCV Valve (replace) · Steering Linkage (inspect) · Suspension System (inspect) · Tire & Wheel Assembly (rotate)
Every 30,000 miAccessory 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)

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 1988 Mercury Cougar's primary issues are concentrated in Seat Belts (18), the Electrical System (12), and Vehicle Speed Control (10), alongside 7 crash and 6 fire complaints. When compared to the provided record from 1990 to 2002, the generation exhibits a trend of increasing complaints and TSBs, culminating in a peak of 521 complaints and 229 TSBs in 1999. The 1988 model year exists prior to this escalating arc of failures and the subsequent spike in recalls. Because it avoids the significant reliability downturn seen in the late 1990s, this is a good year to buy.

1
Open recalls
NHTSA campaigns
22
Service bulletins
Manufacturer communications
5
ODI investigations
Office of Defects Investigation
69
Owner complaints
7 involved a crash · 6 a fire
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 69 complaints on record, top 8 components.

Seat Belts18
Electrical System12
Vehicle Speed Control10
Engine & Engine Cooling5
Visibility5
Service Brakes, Hydraulic4
Exterior Lighting3
Tires2

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

96V071000Electrical System:IgnitionReported 25/04/1996

THE IGNITION SWITCH COULD EXPERIENCE AN INTERNAL SHORT CIRCUIT. Remedy: DEALERS WILL REPLACE THE IGNITION SWITCH.

Technical service bulletins NHTSA · verified

Showing 5 of 22 bulletins on record with NHTSA.

BulletinDateComponentSummary
011562001-08-06VisibilitySOME VEHICLES MAY EXHIBIT HEATER CORE LEAKS. *SLC
011572001-08-06Unknown Or OtherINFORMATION REGARDING TRANSMISSION FLUID USAGE CHARTS. *SLC
0023102000-11-13Power TrainSUBJECT REGARDING CONTAMINATION FROM PRIOR TRANSMISSION CONCERNS OR EXCESS WEAR MAY BE…
00152000-01-10Power TrainINFORMATION REGARDING THE NEW TRANSMISSION COOLER FLUSHER- SERVICE TIP. *MJS
992221999-10-18Electrical SystemSUBJECT 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.

Reference guides

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

Frequently asked

How much oil does the 1988 Cougar take?

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

Does the 1988 Cougar have open recalls?

NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.