DodgeConquest1986Overview/dodge/conquest/1986/base/

1986 Dodge Conquest

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1986 Conquest.

Transmission Automatic 4-spd

The 1986 Dodge Conquest is a midsize model equipped with an automatic four‑speed transmission and a modest 4.0‑quart oil capacity, accepting the common viscosities of 20W‑20, 15W‑40 or 5W‑30 to suit a range of climates. Its EPA ratings of 17 mpg city, 22 mpg highway and a combined 19 mpg reflect the era’s balanced fuel economy for a vehicle of its class. Positioned toward the later half of the first‑generation run, this year is often cited by researchers as a point where the Conquest’s mechanical robustness began to solidify, making it a relatively dependable reference for studies of durability within the model line.

Model year198619851984

Quick specs

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

Engine oil capacity4.0 qtOEM · verified
Engine oil type20W-20 / 15W-40 / 5W-30OEM · verified
EPA fuel economy17/22/19 mpgEPA · verified

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 4-spd

Ratings & economy EPA / vPIC

EPA city / highway / combined17 / 22 / 19 mpg
DrivetrainRear-Wheel Drive
Recommended fuelPremium Gasoline

Service quick specs OEM factory data

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

This engine holds 4.0 qt of 20W-20 / 15W-40 / 5W-30 engine oil, GL-5 · 80W-90 · 85W-90 in the differential, DOT 3 brake fluid.

Lubricants & capacities

Brake FluidDOT 3
Differential Gear OilGL-5 · 80W-90 · 85W-90
Differential Gear Oil Capacity2.5 Pints
Engine CoolantETHYLENE GLYCOL
Engine Oil20W-20 · 15W-40 · 5W-30 · 5W-40
Engine Oil Capacity4.0 qt
Power Steering FluidUSE MOPAR PART NO. 4318055 OR EQUIVALENT

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 3,000 mi; coolant every 15,000 mi. The big-interval services (every 15,000 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.

Every 3,000 miEngine Oil (drain & refill)
Every 6,000 miEngine Oil Filter (replace)
Every 7,500 miBrake Hydraulic System (inspect fluid level) · Power Steering System (inspect)
At 15,000 miThrottle Position Sensor (inspect)
Every 15,000 miAccessory Drive Belt (inspect) · Air Conditioning System (inspect) · Brake System (inspect) · Clutch Master Cylinder (inspect fluid level) · Drive Axle Assembly (drain & refill) · Engine Coolant System (leak inspection)
Every 30,000 miAccessory Drive Belt (inspect) · Differential (inspect fluid level) · Engine Air Filter Element (replace) · Steering Linkage (inspect) · Suspension Ball Joint (inspect) · Transmission Assembly (inspect)
Every 50,000 miAir Injection System (inspect) · Air Intake Duct (inspect) · Engine Coolant System Hoses (inspect) · Fuel Evaporative Canister (replace) · Fuel Evaporative Emission Control System (inspect) · Fuel Evaporative Emission Control System Lines (inspect)
At 60,000 miAccessory Drive Belt (inspect) · Air Conditioning System (inspect)

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.

1
Open recalls
NHTSA campaigns
0
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
0
Owner complaints
0 involved a crash · 0 a fire

No owner complaints on record with NHTSA for this vehicle.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

95V103003Seat Belts:Front:Buckle AssemblyReported 24/05/1995

THE FRONT SAFETY BELT BUCKLE RELEASE BUTTONS CAN BREAK. THESE RED PLASTIC RELEASE BUTTONS ARE MARKED "PRESS." IF A BUTTON BREAKS, PIECES CAN FALL INTO THE BUCKLE ASSEMBLY CAUSING THE BUCKLE TO OPERATE IMPROPERLY. Remedy: OWNERS SHOULD PROMPTLY CHECK THE CONDITION AND OPERATION OF BOTH FRONT SAFETY BELT BUCKLES AND CAREFULLY INSPECT THE RED RELEASE BUTTON FOR ANY BREAKS OR CRACKS. THEY SHOULD…

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 Conquest. 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 1986 Conquest take?

4.0 qt of ABOVE 20 degrees F: 30, 20 degrees F TO 80 degrees F: 20W-20, ABOVE 10 degrees F: 15W-40, BELOW 100 degrees F 5W-30 OR 5W-40, BELOW 60 degrees F: 5W-30, 5W-40, per the factory manual.

Does the 1986 Conquest have open recalls?

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

What gas mileage does the Conquest get?

EPA figures are 17 city / 22 highway / 19 combined mpg.