MitsubishiGalant20033.0L/mitsubishi/galant/2003/3-0l/

2003 Mitsubishi Galant — 3.0L

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

Body PASSENGER CAREngine 3.0LTransmission Automatic 4-spd

The 2003 Mitsubishi Galant is a passenger car powered by a 3.0L engine mated to a 4-speed automatic transmission, returning EPA fuel economy of 18 city and 25 highway mpg, with routine maintenance calling for 4.5 quarts of either 10W-30 or 5W-30 API oil. The model carries 139 owner complaints and 3 recalls on record, with visibility standing out as the top complaint area. Within the Galant's broader 1990–2012 complaint history, this year sits comfortably below the 1994 peak of 263 complaints but well above the 2011 low of just 3, placing it in a relatively settled but not trouble-free middle tier of the model's reliability arc.

Model year20032002200120001999

Quick specs

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

Engine oil capacity4.5 qtOEM · verified
Engine oil type10W-30 / 5W-30 APIOEM · verified
Lug nut torque65-80 ft-lbsOEM · verified
EPA fuel economy18/25/21 mpgEPA · verified

Fitment & sizes

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

From the factory this vehicle uses a BCI 86 · 525 CCA battery, 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.

Battery groupBCI 86 · 525 CCAOEM · verified
Tire sizeP205-55R16OEM · verified
Wheel / rim6-JJ inOEM · verified

OE service part numbers OEM · verified

Engine oil filterMZ690116 alt MZ690072
Engine air filterMB906051
Fuel filterMR993092
Spark plugMD313442 alt MS851728
Front wiper bladesMZ693015 alt 8250A536
Serpentine beltMN187016 alt MN187017
ThermostatMD350415 alt MD328070

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 4-spd

Dimensions & weight NHTSA vPIC

Overall length188.2 in
Overall width68.5 in
Overall height55.9 in
Wheelbase103.9 in
Curb weight3031 lb
Track (front / rear)59.1 / 58.7 in
Weight distribution (front / rear)62/38

Ratings & economy EPA / vPIC

EPA city / highway / combined18 / 25 / 21 mpg
DrivetrainFront-Wheel Drive
Passenger volume96 cu ft
Cargo volume14 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 4.5 qt of 10W-30 / 5W-30 API engine oil, DOT 3 · DOT 4 brake fluid. Torque lug nuts to 65-80 ft-lbs, the oil drain plug to 22.0-29.0 ft-lbs. The firing order is 1-2-3-4-5-6.

Lubricants & capacities

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

Engine torques

Camshaft Bearing/Carrier Cap Bolts or StudsDOHC: 14 ft-lbs; SOHC:
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 Bearings57 ft-lbs
Engine Oil Pan Drain Plug22.0-29.0 ft-lbs
Oil Pump to Cylinder BLock Bolts/Studs10 ft-lbs

Chassis torques

Lug Nuts65-80 ft-lbs
Front Wheel Hub167 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2
Cylinder Firing Order1-2-3-4-5-6
Curb Idle Speed (No Load)700 rpm
Curb Idle Speed Variance (No Load)100 rpm
Ignition Coil Primary Resistance.56-.68 ohms
Ignition Coil Secondary Resistance9400-12,800 ohms
Spark Plug Gap0.039-0.0.043 in
Spark Plug Torque15.0-21.0 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.39-1.48 lbs
Oil GroupPAG
Oil Type56
Oil Capacity4.70 oz
Standard BCI Group Number86
Standard BCI Cranking Performance525 cca

Service checks

Regulated Fuel System Pressure (Without Vacuum)47.0-50.0 psi
Regulated Fuel System Pressure (With Vacuum)38.0 psi
Engine Compression119-83 PSI. 14 Maximum variation PSI.
Engine Compression139-185 psi
Engine Oil Pressure4.3 psi @ Idle, 43-100 psi @ 3500 rpm psi
Intake Valve LashHydraulic in
Exhaust Valve LashHydraulic in

Brakes

Torque Caliper to Bracket32 ft-lbs / 74 ft-lbs
Torque to Knuckle44 ft-lbs / 66-80 ft-lbs
Minimum Pad ThicknessFront: 0.080; Rear: 0.080 in
Minimum Shoe Thickness0.039 in
Rotor Max Parallel Variation0.0006 in
Rotor Runout Limit0.0039 in / 0.0016 in
Rotor Nominal Thickness From1.024 in / 0.394 in
Rotor Nominal Thickness To1.024 in / 0.394 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 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) · Cabin Air Filter (replace) · Engine Oil (drain & refill) · Power Steering System (inspect) · Tire & Wheel Assembly (rotate)
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 Drum Assembly (inspect) · Engine Air Filter Element (replace) · Engine Coolant System (drain, flush & refill) · Exhaust System (Complete) (inspect) · Fuel Line (inspect)
At 60,000 miEngine Coolant System (drain, flush & refill)
Every 60,000 miDistributor Cap (inspect) · Distributor Rotor (inspect) · Fuel Evaporative Emission Control System (inspect) · Fuel Tank (inspect) · Fuel Tank Filler Cap (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.

The 2003 Mitsubishi Galant sits near the end of a declining reliability arc for its generation, which saw federal complaints and recalls peak in 1999 and 2000 at 237 and 11, respectively, before steadily tapering off. With 139 complaints and 3 recalls in 2003, the target year reflects this downward stabilization compared to the prior year's 142 complaints, though it still carries more regulatory friction than the subsequent 2004 model year, which dropped to just 61 complaints and 1 recall. The 2003 model's primary concerns center on Visibility (38 complaints) and Structure (20 complaints), alongside 17 crash and 4 fire complaints, though the data does not specify the root causes for these failures. While the 2003 Galant benefits from late-cycle improvements over the problematic 1999-2001 era, it remains a transitional model before the significantly quieter 2004 refresh. Consequently, a used 2003 model is a moderate buy, but prioritizing a 2004 or newer model will likely yield a more trouble-free ownership experience.

3
Open recalls
NHTSA campaigns
71
Service bulletins
Manufacturer communications
2
ODI investigations
Office of Defects Investigation
139
Owner complaints
17 involved a crash · 4 a fire

Owner complaints filed with NHTSA, by component

All 139 complaints on record, top 8 components.

Visibility38
Structure20
Service Brakes, Hydraulic8
Air Bags7
Engine & Engine Cooling6
Power Train6
Unknown Or Other5
Electrical System,Visibility4

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 3 campaigns on record for this vehicle.

03V442000Fuel System, Gasoline:Delivery:Fuel PumpReported 04/11/2003

ON CERTAIN PASSENGER VEHICLES, THE FUEL RETURN LINE HOSE FITTING ON THE ELECTRIC FUEL PUMP MAY BE RESTRICTED, CAUSING EXCESSIVE FUEL PRESSURE TO BUILD UP IN THE FUEL INJECTION SYSTEM. EXCESSIVE FUEL PRESSURE MAY RESULT… Remedy: DEALERS WILL INSPECT THE FUEL PUMP PRESSURE. THOSE VEHICLES EXHIBITING HIGHER THAN NORMAL FUEL PUMP PRESSURE WILL RECEIVE FUEL PUMP MODIFICATIONS. THE RECALL BEGAN DECEMBER 3…

04V428000Equipment:Other:LabelsReported 01/09/2004

CERTAIN PASSENGER VEHICLES FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 208, 'OCCUPANT CRASH PROTECTION.' THE BILINGUAL ENGLISH/SPANISH REMOVABLE AIR BAG WARNING LABELS AFFIXED TO THE… Remedy: MITSUBISHI CARIBBEAN WILL MAIL A CUSTOMER NOTIFICATION LETTER CONTAINING A WRITTEN DESCRIPTION AND A GRAPHIC OF THE BI-LINGUAL DASHBOARD AIR BAG WARNING LABEL. IN ADDITION, ALL…

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 Galant. 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 Galant 3.0L take?

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

Does the 2003 Galant 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 18 city / 25 highway / 21 combined mpg.