MitsubishiMontero Sport20033.0L/mitsubishi/montero-sport/2003/3-0l/

2003 Mitsubishi Montero Sport — 3.0L

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2003 Montero Sport 3.0L.

Body SUVEngine 3.0LTransmission Automatic 4-spd

Defined as an SUV, the 2003 Mitsubishi Montero Sport 3.0L pairs its 3.0L engine with a 4-speed automatic transmission to deliver EPA fuel economy ratings of 16/21/18 mpg while requiring 4.8 quarts of 10W-30 or 5W-30 API oil for maintenance. Within the broader 1998-2009 model history, this specific year logged 83 total owner complaints, a figure significantly lower than the generation's highest recorded count of 245 in 2001. Although the power train stands as the top complaint area and two recalls were issued, the 2003 model occupies a moderated position in reliability severity between the platform's 2001 peak and the single complaint recorded in 2009.

Model year2003200220012000199919981997

Quick specs

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

Engine oil capacity4.8 qtOEM · verified
Engine oil type10W-30 / 5W-30 APIOEM · verified
Lug nut torque72-87 ft-lbsOEM · verified
EPA fuel economy16/21/18 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 MZ690116. 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.

Tail / brake / turnHEADOEM · verified
Tire size235-75R15OEM · verified
Wheel / rim6-JJ inOEM · verified

OE service part numbers OEM · verified

Engine oil filterMZ690116
Engine air filterMR571471 alt MR571473
Fuel filterMR239580
Spark plugMD361067 alt MD372553
Front wiper bladesMR300877 alt MR300876
Serpentine belt7814A030 alt MD199223
Thermostat1305A239

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 4-spd

Dimensions & weight NHTSA vPIC

Overall length181.1 in
Overall width66.9 in
Overall height67.7 in
Wheelbase107.5 in
Curb weight4112 lb
Track (front / rear)57.9 / 58.3 in
Weight distribution (front / rear)55/45

Ratings & economy EPA / vPIC

EPA city / highway / combined16 / 21 / 18 mpg
DrivetrainRear-Wheel Drive
Recommended fuelRegular Gasoline

Performance & power Independent road tests

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

No 2003 road test on record; the results below are same-engine tests from nearby model years, each shown under its own year.

10.0–11.4 sec0–60 mph (tested)quickest 10.00 sec — 1997 LS
173 hpHorsepower (as tested)
188 lb-ftTorque (as tested)
YearTrim / engine0–60¼ mileHPDrivetrain
1998LS 3.0L V610.50 sec17.80 sec173 hp4x4
1998LS 3.0L V610.70 sec17.90 sec173 hp4x4
1997LS 3.0L V610.00 sec17.40 sec173 hp4x4
1997LS 3.0L V611.40 sec18.40 sec173 hp4x4

Service quick specs OEM factory data

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

This engine holds 4.8 qt of 10W-30 / 5W-30 API engine oil, DOT 3 · DOT 4 brake fluid. Torque lug nuts to 72-87 ft-lbs, the oil drain plug to 29.0 ft-lbs. The firing order is 1-2-3-4-5-6.

Lubricants & capacities

Brake FluidDOT 3 · DOT 4
Engine Oil10W-30 · API · 5W-30
Engine Oil Capacity4.8 qt
Power Steering FluidGenuine Mitsubishi PS fluid
Power Steering FluidUse Mitsubishi PS fluid

Engine torques

Camshaft Bearing/Carrier Cap Bolts or StudsTighten in 2
Crankshaft Pulley and/or Damper Bolts134 ft-lbs
Engine Flywheel Bolts54 ft-lbs
Intake Manifold to Engine Bolts18 ft-lbs
Exhaust Manifold to Cylinder Head Bolts33 ft-lbs
Main Bearings69 ft-lbs
Engine Oil Pan Drain Plug29.0 ft-lbs
Oil Pump to Cylinder BLock Bolts/Studs10 ft-lbs

Chassis torques

Lug Nuts72-87 ft-lbs
Transfer Case Fill Plug21.0-25.0 ft-lbs
Transfer Case Drain Plug21.0-25.0 ft-lbs

Ignition

Cylinder Firing Order1-2-3-4-5-6
Curb Idle Speed (No Load)700 rpm
Curb Idle Speed Variance (No Load)100 rpm
Spark Plug Gap0.039-0.0.043 in
Spark Plug Torque15.0-21.0 ft-lbs
Ignition Timing5, Not adjustable degrees
Ignition Timing Acceptable Variance3 degrees

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.44-1.50 lbs
Oil GroupPAG
Oil Type56
Oil Capacity5.70 oz
Optional BCI Group Number24
Optional BCI Cranking Performance585 cca

Service checks

Regulated Fuel System Pressure (Without Vacuum)47.0-50.0 psi
Regulated Fuel System Pressure (With Vacuum)38.0 psi
Engine Compression171-127 PSI. 14 maximum variation PSI.
Engine Compression127-171 psi
Engine Oil Pressure4.2 psi @ Idle, 43-100 psi @ 3500 rpm psi
Intake Valve LashHydraulic in
Exhaust Valve LashHydraulic in

Brakes

Torque Caliper to Bracket32 ft-lbs / 55 ft-lbs
Torque to Knuckle65 ft-lbs
Minimum Pad ThicknessFront: 0.080; Rear: 0.080 in
Minimum Shoe Thickness0.039 in
Rotor Runout Limit0.0031 in / 0.0024 in
Rotor Nominal Thickness From0.709 in / 0.945 in
Rotor Nominal Thickness To0.709 in / 0.945 in
Rotor Discard at or Under0.65 in / 0.88 in

Multi-step torque procedures OEM · verified

Connecting Rod (Large End) Bearings — tightening sequence 1 stages
125 ft. lbs., Step 2: 9025 ft. lbs
Cylinder Head — tightening sequence 3 stages
180 ft. lbs.80 ft. lbs
2Loosen all bolts completely.
380 ft. lbs.80 ft. lbs

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 at 60,000 mi. The big-interval services (at 60,000 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) · Engine Oil Filter (replace) · Power Steering System (inspect) · Tire & Wheel Assembly (rotate)
Every 15,000 miAxle Shaft Oil Seal (inspect) · Brake Linings (inspect) · CV Joint Boot (inspect)
Every 30,000 miAccessory Drive Belt (inspect) · Brake Drum Assembly (inspect) · Brake System (inspect) · Differential (inspect fluid level) · Drive Axle Assembly (drain & refill) · Driveshaft U-Joint (inspect)
At 60,000 miEngine Coolant System (drain, flush & refill)
Every 60,000 miFuel Evaporative Emission Control System (inspect) · Fuel Tank (inspect) · Fuel Tank Filler Cap (inspect) · Spark Plug Wires (replace) · Timing Belt (replace)
At 105,000 miSpark Plugs (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 2003 Mitsubishi Montero Sport sits in the middle of a clear upward-then-downward arc in federal safety data for its generation. Complaints surged from 98 in 2000 to a peak of 245 in 2001, then fell sharply to 61 in 2002 and 83 in 2003—still elevated compared to the 5 complaints logged for 2004. Recalls followed a similar pattern, spiking to 6 in 2001 before dropping to 2 in 2003, while TSBs declined from 162 in 2001 to 71 in 2003. The 2003 model’s top complaint areas—power train, engine cooling, and electrical system—mirror broader generational concerns, though crash-related complaints (12) and fire reports (3) remain notable. This suggests Mitsubishi addressed some early reliability issues but hadn’t fully resolved them by 2003. Given the data, the 2003 Montero Sport is a **marginal buy**; while better than the problematic 2001 model, it lacks the near-clean slate of the 2004 refresh.

2
Open recalls
NHTSA campaigns
71
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
83
Owner complaints
12 involved a crash · 3 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Rollover★★★★★
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 83 complaints on record, top 8 components.

Power Train11
Engine & Engine Cooling7
Electrical System6
Air Bags5
Service Brakes, Hydraulic5
Fuel System, Gasoline5
Service Brakes4
Visibility4

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.

Technical service bulletins NHTSA · verified

Showing 5 of 71 bulletins on record with NHTSA.

BulletinDateComponentSummary
DEALER LETTER2023-07-21EquipmentThis is a Dealer Letter sent to dealers informing that Mitsubishi Technical Training has…
TSB-23-00-0042023-04-24StructureThis Technical Service Bulletin provides instructions and material safety data sheets for…
TSB-23-00-0012023-04-24EquipmentThis Technical Service Bulletin reviews the regulations that require a label showing the…
DEALER LETTER2023-04-21EquipmentThis is a Dealer Letter sent to dealers informing that Mitsubishi Technical Training has…
TSB-22-54-0032022-04-07Exterior LightingThis Technical Service Bulletin was sent to dealers to explain the difference between…

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 Montero Sport. 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 2003 Montero Sport 3.0L take?

4.8 qt of ABOVE 0 degreesF 10W-30 SL API, BELOW 100 degreesF 5W-30 SL API, per the factory manual.

Does the 2003 Montero Sport 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 / 21 highway / 18 combined mpg.