2003 Mitsubishi Lancer Service and Repair Manual

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Factory-Grade Data

2003 Mitsubishi Lancer service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical diagnostics with wiring diagrams
  • Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more

Trims covered

  • ES Sedan 4-Door
  • LS Sedan 4-Door
  • Evolution Sedan 4-Door
  • OZ Rally Sedan 4-Door

Engines covered

  • 2.0L 2000CC l4 GAS SOHC Naturally Aspirated
  • 2.0L 1997CC 122Cu. In. l4 GAS DOHC Turbocharged

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

2003 Mitsubishi Lancer Recalls & Complaints

NHTSA #16V45800023/06/2016Component: SUSPENSION:FRONT:CONTROL ARM:LOWER ARM

Mitsubishi Motors North America, Inc. (MMNA) is recalling certain model year 2002-2007 Lancer, 2004 Lancer Wagon, 2003-2006 Lancer Evolution, 2003-2006 Outlander and 2007-2013 Outlander V-6 vehicles o

Consequence

A detached front control arm can result in the loss of control of the vehicle, increasing the risk o

Remedy

MMNA will notify owners, and dealers will inspect the front cross members. Depending on the level o

NHTSA #06E02300013/03/2006Component: EXTERIOR LIGHTING:HEADLIGHTS

CERTAIN ANZO COMBINATION HEADLAMP ASSEMBLIES SOLD AS REPLACEMENT LAMPS FOR USE ON CERTAIN PASSENGER VEHICLES. SOME COMBINATION LAMPS ARE NOT EQUIPPED WITH AMBER SIDE REFLECTORS WHICH FAIL TO CONFORM

Consequence

WITHOUT THE AMBER REFLECTORS, THE VEHICLE WILL BE POORLY ILLUMINATED, POSSIBLY RESULTING IN A VEHICL

Remedy

ANZO WILL NOTIFY OWNERS AND REPLACE THE HEADLAMPS FREE OF CHARGE. THE RECALL BEGAN MAY 9, 2006. OW

NHTSA #09E02500011/05/2009Component: EXTERIOR LIGHTING:HEADLIGHTS

DOPE, INC. IS RECALLING 42,540 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HEADLAMPS FAIL TO CONF

Consequence

DECREASED LIGHTING VISIBILITY MAY RESULT IN A VEHICLE CRASH.

Remedy

DOPE, INC. WILL NOTIFY OWNERS AND OFFER A FULL REFUND FOR THE NONCOMPLIANT COMBINATION LAMPS. THE S

NHTSA #04V42800001/09/2004Component: EQUIPMENT:OTHER:LABELS

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 L

Consequence

THIS DOES NOT MEET THE REQUIREMENTS OF THE STANDARD.

Remedy

MITSUBISHI CARIBBEAN WILL MAIL A CUSTOMER NOTIFICATION LETTER CONTAINING A WRITTEN DESCRIPTION AND A

TSB #10240443

This is a Dealer Letter sent to dealers informing that Mitsubishi Technical Training has launched the 3rd quarterly technician quiz for 2023.

TSB #10235609

This Technical Service Bulletin provides instructions and material safety data sheets for removal of rap-film adhesive residue.

TSB #10235608

This Technical Service Bulletin reviews the regulations that require a label showing the reduction in load carrying capacity be affixed to vehicles when the total net weight of accessories is more than 1.5 percent of the vehicle's gross veh

TSB #10235606

This is a Dealer Letter sent to dealers informing that Mitsubishi Technical Training has launched the 2nd quarterly technician quiz for 2023.

TSB #10211530

This Technical Service Bulletin was sent to dealers to explain the difference between normal dew condensation, which is a natural phenomenon, and water penetration caused by improper sealing or a defective/broken part.

TSB #10170852

This Technical Service Bulletin updates the door adjustment procedure in the Body Section of the applicable service manuals.

TSB #10170070

This TSB contains troubleshooting steps for diagnosis of various customer complaints relating to the audio system speakers in Mitsubishi vehicles equipped with original equipment audio components.

TSB #10170099

This is an index of Tech Talk newsletter articles released in 2012.

Showing the 8 most recent of 77 technical service bulletins on file with NHTSA.

20041226Component: POWER TRAIN:AUTOMATIC TRANSMISSIONCrash reported3 injured

I PURCHASED A 2003 MITSUBISHI LANCER LS, FRM THE MMSA CO. USED PARKING LOT, WITH ONLY A 100 MILES. CAR SEEMED TO RUN FINE, AND THEN IT STARTED TO RANDOMLY REVV AND THEM STALL. IT WASNT THAT BAD AT FIR

20040719Component: AIR BAGS:FRONTALCrash reported2 injured

DURING A 30 MPH FRONTAL COLLISION FRONT AIR BAGS DID NOT DEPLOY. DEALERSHIP WAS NOTIFIED, BUT DID NOT RESOLVE THE PROBLEM. THE TWO OCCUPANT SUFFERED FROM CHEST, BACK AND SHOULDER INJURIES. *NM

20031113Component: AIR BAGS:FRONTALCrash reported2 injured

VEHICLE WAS INVOLVED IN A FRONT PASSENGER SIDE COLLISION WHILE DRIVING AT 40 MPH. UPON IMPACT, NEITHER DRIVER'S SIDE NOR PASSENGER'S SIDE AIR BAGS DEPLOYED DRIVER AND PASSENGER SUSTAINED MINOR

20180322Component: UNKNOWN OR OTHERCrash reported1 injured

2003 MITSUBISHI LANCER. CONSUMER WRITES IN REGARDS TO VEHICLE STALLS AND CAUSES HEAD-ON COLLISION. *SMD *JS

20100625Component: AIR BAGS:FRONTALCrash reported1 injured

TL* THE CONTACT OWNED A 2003 MITSUBISHI LANCER. WHILE DRIVING AT AN UNKNOWN SPEED, THE CONSUMER WAS INVOLVED IN A CRASH THAT DESTROYED THE VEHICLE. THE CONTACT STATED THE FRONTAL DRIVER AIR BAG DID N

Showing the 5 most serious of 241 complaints filed with NHTSA.

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