MitsubishiDiamante19933.0L/mitsubishi/diamante/1993/3-0l/

1993 Mitsubishi Diamante — 3.0L

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1993 Diamante 3.0L. Covers both the standard and High Output 3.0L.

Body PASSENGER CAREngine 3.0LTransmission Automatic 4-spd

The 1993 Mitsubishi Diamante 3.0L is a passenger car powered by a 3.0L engine and 4-speed automatic transmission, delivering EPA fuel economy ratings of 16/22/18 mpg. Reliability records for this specific model year document 35 total owner complaints with air bags listed as the top complaint area alongside three recalls. Across the full 1992-2004 model history where complaint volumes varied from a low of 3 in 2004 to a high of 133 in 2002, the 1993 model year registers below the peak complaint volume observed in the later years of the covered period.

Model year19961995199419931992

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 economy16/22/18 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 plugMS851336 alt MS851238
Front wiper bladesMZ690946 alt MR300876
Serpentine beltMD326780 alt MD187461
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 / 22 / 18 mpg
DrivetrainFront-Wheel Drive
Passenger volume94 cu ft
Cargo volume14 cu ft
Recommended fuelPremium Gasoline

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

No 1993 road test on record; the results below are same-engine tests from nearby model years, each shown under its own year.

8.8–9.2 sec0–60 mph (tested)quickest 8.80 sec — 1992 LS Sedan
202 hpHorsepower (as tested)
202 lb-ftTorque (as tested)
YearTrim / engine0–60¼ mileHPDrivetrain
1992LS Sedan 3.0L V68.80 sec16.80 sec202 hpFWD
1992LS Sedan 3.0L V68.90 sec16.60 sec202 hpFWD
1992LS Sedan 3.0L V69.20 sec17.00 sec202 hpFWD

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) · Spark Plugs (replace) · Timing Belt (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.

The 1993 Mitsubishi Diamante marks a slight improvement in reliability compared to its 1992 predecessor, with complaints dropping from 49 to 35 while recalls increased modestly from 2 to 3. This year sits at the beginning of a downward trend in complaints through 1995, suggesting early refinement of first-generation issues, though the number of recalls remains relatively consistent with adjacent years. Notably, airbag-related complaints dominate (10 of 35), a recurring concern in this generation, while powertrain and brake issues also appear with some frequency. Compared to later years—particularly 1997 onward—1993’s complaint volume is lower, but its recall count is higher than the zero-recall years of 1995 and 1997, indicating unresolved safety or compliance actions. The data doesn’t specify root causes, but the concentration of airbag and crash-related complaints (10) warrants caution. **Takeaway:** While 1993 is a better year than 1992, its elevated airbag complaints and recalls make it a riskier choice than the more stable 1995 model.

3
Open recalls
NHTSA campaigns
14
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
35
Owner complaints
10 involved a crash · 1 a fire
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 35 complaints on record, top 8 components.

Air Bags10
Power Train5
Service Brakes, Hydraulic5
Structure3
Suspension2
Engine & Engine Cooling1
Service Brakes, Hydraulic,Engine & Engine Cooling1
Service Brakes, Hydraulic,Engine & Engine Cooling,Power Train1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 3 campaigns on record for this vehicle.

93V044000Seat Belts:Front:AnchorageReported 16/03/1993

THE REAR OUTBOARD LOWER SAFETY BELT ATTACHMENT BOLT WAS INADEQUATELY TORQUED ON INSTALLATION. Remedy: RETORQUE THE SAFETY BELT ATTACHMENTS TO THE CORRECT SPECIFICATION.

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.

Technical service bulletins NHTSA · verified

Showing 5 of 14 bulletins on record with NHTSA.

BulletinDateComponentSummary
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…
96V1431998-08-28Service Brakes, HydraulicMMSA HAS DETERMINED THAT UNDER CERTAIN CONDITIONS, THE FRONT LOWER BRAKE HOSES MAY…

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. 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 1993 Diamante 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 1993 Diamante have open recalls?

NHTSA lists 3 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 / 22 highway / 18 combined mpg.