JeepComanche1989Overview/jeep/comanche/1989/base/

1989 Jeep Comanche

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

The 1989 Jeep Comanche requires 4 quarts of engine oil with filter service, specifying 20W-40, 20W-50, or 10W-40 API viscosity grades. Reliability records show 12 total owner complaints with tires as the top complaint area alongside one recall. This positions the model year just before the 1990 peak of 14 grievances, representing the early-stage reliability concerns that would eventually taper to just 2 complaints by 1992.

Model year199119901989198819871986

Quick specs

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

Engine oil capacity4 qt w/ filterOEM · verified
Engine oil type20W-40 / 20W-50 / 10W-40 APIOEM · verified

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length179.1 in
Overall width71.7 in
Overall height64.6 in
Wheelbase113 in
Curb weight3089 lb
Track (front / rear)57.1 / 57.1 in

Service quick specs OEM factory data

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

This engine holds 4 qt w/ filter of 20W-40 / 20W-50 / 10W-40 API engine oil, 75W-90 · GL-5 · 80W-90 in the differential, DOT 3 brake fluid.

Lubricants & capacities

Brake FluidDOT 3
Differential Gear Oil75W-90 · GL-5 · 80W-90
Differential Gear Oil Capacity3 Pints,
Differential Gear Oil75W-90 · GL-5 · 80W-90
Differential Gear Oil Capacity2.5 Pints
Engine CoolantHOAT · MS9769
Engine Oil20W-40 · 20W-50 · API · 10W-40 · 5W-30
Engine Oil Capacity4 qt w/ filter

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 52,500 mi; coolant every 22,500 mi. The big-interval services (every 22,500 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.

Every 7,500 miCV Joint Boot (inspect) · Driveshaft U-Joint (lubricate) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Exhaust System (Complete) (inspect) · Steering Gear Box Assembly (inspect)
Every 15,000 miBattery (inspect electrolyte level)
Every 22,500 miEngine Coolant System (drain, flush & refill)
Every 30,000 miBands (adjust) · Body Latches, Locks & Hinges (inspect) · Brake System (inspect) · Differential (inspect fluid level) · Distributor Cap (inspect) · Distributor Rotor (inspect)
Every 52,500 miAccessory Drive Belt (inspect) · Emission Control System (inspect) · Fuel Tank Filler Cap (inspect) · Spark Plug Wires (replace)
Every 82,500 miOxygen Sensor (replace)

Owner how-tos

Condensed service procedures for routine maintenance. Procedures that require dealer diagnostic equipment are identified and summarized only.

Common procedures

Key fob — remote (RKE) programming programming new fob buttons Dealer tool OEM · verified
Tool requiredDRBIII scan tool (dealer / locksmith)
WhyTransmitter codes are written into the receiver in the passenger door module
Anti-theft (SKIS) — module initialization after immobilizer module replacement Dealer tool OEM · verified
When neededAfter Sentry Key Immobilizer Module (SKIM) replacement
Tool requiredDRBIII scan tool
Also requiredThe vehicle's four-digit PIN code

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 federal record for the Jeep Comanche generation shows a clear downward arc in complaints and recalls from 1990 through 1992, with 1990 posting the highest activity at 14 complaints and 2 recalls, tapering to just 2 complaints and zero recalls by 1992. The 1989 target year sits at the leading edge of this arc, preceding the peak year, and its complaint profile—Tires and Power Train tied at three complaints each, followed by Steering at two—aligns with the early-generation issues that would intensify in 1990 before being progressively addressed. Notably, 1989 records two fire complaints, a serious flag that the data does not attribute to a specific root cause, and zero crash complaints. The absence of recall and investigation figures for 1989 in the provided record limits a direct safety comparison, but the trajectory suggests the model improved meaningfully after 1990. For a buyer, 1989 represents the less-documented front end of a generation whose known problems peaked the following year; while the fire complaints warrant a thorough pre-purchase inspection of the fuel and electrical systems, the declining complaint trend in subsequent years offers some reassurance that any systemic issues were eventually addressed—making this a condition-dependent purchase rather than a year to avoid outright.

1
Open recalls
NHTSA campaigns
11
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
12
Owner complaints
0 involved a crash · 2 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Overall★★★★★
Frontal★★★★★
Side★★★★★
Rollover★★★★
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 12 complaints on record, top 7 components.

Tires3
Power Train3
Steering2
Vehicle Speed Control1
Engine & Engine Cooling1
Equipment1
Seat Belts1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

90V177000Vehicle Speed Control:Cruise ControlReported 02/10/1990

MALFUNCTION OF FUEL INJECTION SYSTEM THROTTLE POSTITION SENSOR COULD CAUSE INTERMITTENT HIGH ENGINE IDLE SPEED IMMEDIATELY AFTER STARTING ENGINE. Remedy: REPLACE THROTTLE POSITION SENSORS WITH SENSORS THAT WOULD SEND CORRECT SIGNALS TO THE FUEL INJECTION SYSTEM.

Technical service bulletins NHTSA · verified

Showing 5 of 11 bulletins on record with NHTSA.

BulletinDateComponentSummary
21006012001-03-16Power TrainAUTOMATIC TRANSMISSION FLUID USAGE ATF+4. *TT *MJ
0800600REV2000-12-29Electrical SystemSUBJECT REGARDING WIRE SPLICE REPAIRS. *SB
0806002000-02-25Electrical SystemTHIS BULLETIN PROVIDES A REVISED WIRE SPLICE PROCEDURE AND RELATED PARTS. *TT
0816981998-04-17EquipmentINFORMATION ON INSTALLATION OF RADIO TRANSMITTING EQUIPMENT. *AK
0703971997-05-09Engine And Engine CoolingVARIOUS CAR OWNER'S HAVE EXPRESSED INTEREST IN USING ENGINE COOLANTS MADE WITH PROPYLENE…

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 Comanche. 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 1989 Comanche take?

4 qt w/ filter of ABOVE 30 degrees F: 20W-40 OR 20W-50 API, ABOVE 0 degrees F: 10W-40 API, BELOW 60 degrees F: 5W-30 API, per the factory manual.

Does the 1989 Comanche have open recalls?

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