MitsubishiDiamante Wagon19943.0L/mitsubishi/diamante-wagon/1994/3-0l/

1994 Mitsubishi Diamante Wagon — 3.0L

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1994 Diamante Wagon 3.0L.

Engine 3.0LTransmission Automatic 4-spd

The 1994 Mitsubishi Diamante Wagon pairs a 3.0L engine with a 4-speed automatic transmission, delivering an EPA-estimated 16 mpg city and 23 mpg highway. It requires 4.2 quarts of oil, with recommended viscosities of 20W-40, 10W-30, or 5W-30 API. In terms of reliability, this model year accumulated 34 owner complaints—most frequently concerning the air bags—and was subject to two recalls, signaling a need for careful inspection of the supplemental restraint system.

Model year199519941993

Quick specs

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

Engine oil capacity4.2 qtOEM · verified
Engine oil type20W-40 / 10W-30 / 5W-30 APIOEM · verified
EPA fuel economy16/23/19 mpgEPA · verified

Fitment & sizes

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

From the factory this vehicle uses OE oil filter MD136790. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Tire size4WD:P225-75R15OEM · verified
Wheel / rim6-JJ inOEM · verified

OE service part numbers OEM · verified

Engine oil filterMD136790
Engine air filterMR571471
Fuel filterMB658684
Spark plugMS851238 alt MS851336
Front wiper bladesMR300876 alt MZ690946
Serpentine beltMD172376 alt MZ690263
ThermostatMD972903 alt 1305A191

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 4-spd

Ratings & economy EPA / vPIC

EPA city / highway / combined16 / 23 / 19 mpg
DrivetrainFront-Wheel Drive
Passenger volume102 cu ft
Cargo volume43 cu ft
Recommended fuelPremium Gasoline

Service quick specs OEM factory data

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

This engine holds 4.2 qt of 20W-40 / 10W-30 / 5W-30 API engine oil, DOT 3 · DOT 4 brake fluid.

Lubricants & capacities

Brake FluidDOT 3 · DOT 4
Engine CoolantETHYLENE GLYCOL
Engine Oil20W-40 · API · 10W-30 · 5W-30
Engine Oil Capacity4.2 qt
Power Steering FluidUse Mitsubishi PS fluid

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.

Every 7,500 miBrake Hydraulic System (inspect fluid level) · Clutch Master Cylinder (inspect fluid level) · Engine Oil (drain & refill) · Power Steering System (inspect)
Every 15,000 miAxle Shaft Oil Seal (inspect) · Brake Line (inspect) · Brake Linings (inspect) · CV Joint Boot (inspect) · Engine Oil Filter (replace)
Every 30,000 miAccessory Drive Belt (inspect) · Brake System (inspect) · Engine Air Filter Element (replace) · Engine Coolant System (drain, flush & refill) · Exhaust System (Complete) (inspect) · Fuel Line (inspect)
Every 60,000 miBalance Shaft Drive Belt (replace) · Distributor Cap (inspect) · Distributor Rotor (inspect) · Fuel Evaporative Emission Control System (inspect) · Fuel System (inspect) · Spark Plug Wires (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.

Owner complaints about the 1994 Mitsubishi Diamante Wagon lead in one area — the air bags, 8 of 34 reports (24%), well ahead of the next concern. None of this vehicle's 2 recall campaigns target the air bags, so those reports read as owner-reported wear-and-tear rather than an acknowledged defect. 7 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the air bags pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.

2
Open recalls
NHTSA campaigns
17
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
34
Owner complaints
7 involved a crash · 0 a fire

Owner complaints filed with NHTSA, by component

All 34 complaints on record, top 8 components.

Air Bags8
Service Brakes, Hydraulic6
Tires3
Seat Belts3
Engine & Engine Cooling2
Vehicle Speed Control2
Power Train2
Exterior Lighting2

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 2 campaigns on record for this vehicle.

96V143002Service Brakes, Hydraulic:Foundation Components:Hoses, Lines/Piping, And FittingsReported 12/08/1996

UNDER CONDITIONS OF FULL LOCK STEERING AND FULL SUSPENSION TRAVEL, THE LEFT OR RIGHT FRONT WHEEL-SIDE BRAKE HOSE CAN CRACK, RESULTING IN BRAKE FLUID LEAKAGE. Remedy: DEALERS WILL REPLACE THE LEFT AND RIGHT FRONT WHEEL-SIDE BRAKE HOSES WITH REVISED HOSE ASSEMBLIES.

96V143001Service Brakes, Hydraulic:Foundation Components:Hoses, Lines/Piping, And FittingsReported 25/07/1996

UNDER CONDITIONS OF FULL LOCK STEERING AND FULL SUSPENSION TRAVEL, THE LEFT OR RIGHT FRONT WHEEL-SIDE BRAKE HOSE CAN CRACK, RESULTING IN BRAKE FLUID LEAKAGE. Remedy: DEALERS WILL REPLACE THE LEFT AND RIGHT FRONT WHEEL-SIDE BRAKE HOSES WITH REVISED HOSE ASSEMBLIES.

Technical service bulletins NHTSA · verified

Showing 5 of 17 bulletins on record with NHTSA.

BulletinDateComponentSummary
TSB-22-54-0032022-04-07Exterior LightingThis Technical Service Bulletin was sent to dealers to explain the difference between…
TT2532019-11-26EquipmentThis is a service newsletter (Tech Talk) that was sent out to dealers.
TSB-19-00-0082019-07-30EquipmentThis is a Technical Service Bulletin sent to dealers. This bulletin supersedes…
TT2372018-02-26EquipmentThis is a service newsletter (Tech Talk) that was sent out to dealers.
TSB-13-42A-0022013-01-29StructureThis Technical Service Bulletin updates the door adjustment procedure in the Body Section…

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 Diamante Wagon. 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 1994 Diamante Wagon 3.0L take?

4.2 qt of ABOVE 32 degrees F: 20W-40 API, ABOVE -10 degrees F: 10W-30 API, BELOW 60 degrees F 5W-30 API, per the factory manual.

Does the 1994 Diamante Wagon have open recalls?

NHTSA lists 2 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the 3.0L get?

EPA figures are 16 city / 23 highway / 19 combined mpg.