MercuryTopaz1991Overview/mercury/topaz/1991/base/

1991 Mercury Topaz

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1991 Topaz.

Transmission Automatic 3-spd

The 1991 Mercury Topaz is characterized by its 3-speed automatic transmission and EPA fuel economy ratings of 19/24/21 mpg. Reliability data for this specific year reveals 54 total owner complaints, predominantly focused on the electrical system, alongside a single recall. When contextualized within the model's complaint history spanning 1990 to 1998, this year sits well below the 1994 peak of 100 complaints but significantly higher than the single complaint recorded in 1998. Consequently, the 1991 model represents a period of moderate, electrical-focused reliability challenges before the model line experienced a substantial reduction in reported issues.

Model year199419931992199119901989198819871986

Quick specs

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

EPA fuel economy19/24/21 mpgEPA · verified

Fitment & sizes

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

OE service part numbers OEM · verified

ThermostatRT1062

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 3-spd

Dimensions & weight NHTSA vPIC

Overall length177.2 in
Overall width68.1 in
Overall height52.8 in
Wheelbase100 in
Curb weight2608 lb
Weight distribution (front / rear)62/38

Ratings & economy EPA / vPIC

EPA city / highway / combined19 / 24 / 21 mpg
DrivetrainFront-Wheel Drive
Passenger volume90 cu ft
Cargo volume13 cu ft
Recommended fuelRegular Gasoline

Service quick specs OEM factory data

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

This engine DOT 3 brake fluid.

Lubricants & capacities

Brake FluidDOT 3
Engine CoolantETHYLENE GLYCOL

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 miTire & 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 1991 Mercury Topaz occupies a brief low point in the generation's federal record, dropping from 65 complaints in 1990 to 54 in 1991, before complaints steadily climb to a peak of 100 in 1994. While recalls dropped to just one in 1991 and investigations matched 1990's count of three, the subsequent surge in complaints and Technical Service Bulletins—reaching 49 and 59 in 1992 and 1993, respectively—implies that underlying defects simply manifest later in this vehicle's lifecycle rather than being resolved. For the 1991 model specifically, the primary complaint areas are the Electrical System (12), Service Brakes Hydraulic (10), Engine & Engine Cooling (7), and Seat Belts (7). Notably, 10 of the 54 total complaints involve fires, a disproportionate figure for which the data does not specify a root cause, though it likely correlates with the high number of electrical and engine complaints. Given the elevated fire risk relative to total complaints and the generation's escalating defect trend in the following years, the 1991 Mercury Topaz is a risky purchase that prospective buyers should avoid.

1
Open recalls
NHTSA campaigns
38
Service bulletins
Manufacturer communications
3
ODI investigations
Office of Defects Investigation
54
Owner complaints
0 involved a crash · 10 a fire
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 54 complaints on record, top 8 components.

Electrical System12
Service Brakes, Hydraulic10
Engine & Engine Cooling7
Seat Belts7
Fuel System, Gasoline6
Vehicle Speed Control4
Steering,Seat Belts,Structure,Unknown Or Other1
Engine & Engine Cooling,Electrical System1

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 38 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
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…
991961999-09-20EquipmentINFORMATION ON IDENTIFYING NON-APPROVED / ALTERNATE REFRIGERANTS WHICH COULD CAUSE…

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 Topaz. 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

Does the 1991 Topaz have open recalls?

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

What gas mileage does the Topaz get?

EPA figures are 19 city / 24 highway / 21 combined mpg.