🏷️ Basic Information

Make:

Mitsubishi

Model:

Lancer Evolution

Year:

2003

Model Code:

CT9A (GSR/RS variants)

Engine Code:

4G63 (2.0L DOHC MIVEC Turbocharged)

👋 Introduction

Market Position:

The Mitsubishi Lancer Evolution (Evo) is a legendary rally-bred performance sedan, renowned for its advanced all-wheel-drive system (AWC), turbocharged engine, and exceptional handling. The 2003 model, specifically the VIII generation, solidified its reputation as a formidable street and track car, competing against icons like the Subaru WRX STI.

Competitive Analysis:

Competed directly with the Subaru Impreza WRX STI of the same era, offering a more sophisticated Active Yaw Control (AYC) system and a reputation for razor-sharp responsiveness. Other performance rivals included the Audi S4, BMW 3 Series (performance variants), and various European hot hatches.

Key Features:

Symmetrical All-Wheel Drive (SAWC) with Active Yaw Control (AYC) and Active Center Differential (ACD), powerful 4G63 MIVEC turbocharged engine, strong chassis, aggressive styling, performance-oriented interior, advanced cooling systems.

📋 Manual Details

Systems Covered:

Engine Mechanical, Engine Control System (ECU), Fuel System, Ignition System, Cooling System, Lubrication System, Exhaust System, Clutch, Manual Transmission (Gears, Differentials), Driveshafts, Suspension (Front & Rear), Steering System, Brake System (Front & Rear, ABS), Body & Frame, Electrical System (Wiring Diagrams, Components), HVAC System, Interior Trim, Exterior Trim, Audio System, Security System, Diagnostic Procedures, Troubleshooting Guides.

Page Count:

Approximately 1500+ pages (estimated for a complete factory service manual)

Manual Type:

Factory Service Manual (FSM)

Language:

English

Format:

PDF

📖 Manual Coverage

Engine Mechanical:

Complete overhaul procedures, component specifications, piston/ring/bearing clearances, valve timing, cylinder head assembly, torque specifications.

Engine Control System:

ECU component identification, sensor data, actuator control, diagnostic trouble codes (DTCs), troubleshooting flowcharts, wiring diagrams for engine management.

Fuel System:

Fuel pump, injectors, fuel pressure regulator, fuel filter replacement, fuel line routing, pressure testing.

Transmission Manual:

Gearbox disassembly and assembly, clutch inspection and replacement, torque specifications for internal components, shift mechanism.

Suspension Steering:

Front and rear suspension component replacement (shocks, springs, bushings), alignment specifications, steering rack and pinion overhaul, power steering system.

Brake System:

Brake pad and rotor replacement, caliper overhaul, bleeding procedures, ABS component testing, parking brake adjustment.

Electrical System:

Comprehensive wiring diagrams for all circuits, component locations, fuse and relay identification, starter and alternator testing, lighting system diagnostics.

Maintenance Procedures:

Oil and filter changes, spark plug replacement, air filter replacement, coolant flush and fill, brake fluid flush, power steering fluid flush, differential fluid change.

Diagnostic Procedures:

Troubleshooting common issues, symptom-based diagnostics, DTC interpretation, using scan tools, component testing methods.

Repair Procedures:

Step-by-step instructions for engine, transmission, suspension, brake, and electrical component repairs and replacements.

Installation Procedures:

Instructions for installing specific aftermarket parts or factory upgrades, though this is primarily a service manual.

Technical Depth:

Full factory diagnostic and repair procedures, including detailed torque specifications, clearances, tolerances, and troubleshooting flowcharts. Suitable for professional technicians and advanced DIY enthusiasts.

📊 Manual Specifications

File Format:

PDF

Print Quality:

High-resolution, searchable text and clear diagrams. Optimized for printing.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

Inline 4-cylinder, DOHC, 16-valve, MIVEC, turbocharged and intercooled

Displacement:

2.0 Liters (1997 cc)

Bore X Stroke:

85.0 mm x 88.0 mm

Compression Ratio:

8.8:1

Horsepower Bhp:

271 hp @ 6500 rpm (JDM/USDM spec)

Torque Lb-Ft:

273 lb-ft @ 3500 rpm (JDM/USDM spec)

Fuel Delivery:

Electronic Fuel Injection (EFI), Sequential Multiport Fuel Injection

Fuel Type:

Unleaded Gasoline (Premium, 91+ octane recommended)

Ignition System:

Electronic ignition with knock sensor, Distributorless Ignition System (DIS)

Turbocharger:

MHI TD05H-16G Twin-Scroll Turbocharger with intercooler

Cooling System Type:

Pressurized liquid cooling system

Coolant Type:

Mitsubishi Super Long Life Coolant (or equivalent ethylene glycol based, green color)

🔧 Transmission

Transmission Type:

6-Speed Manual Transmission

Transmission Type Optional:

N/A (6-speed manual was standard for most markets)

Clutch Type:

Hydraulically operated, multi-plate clutch

Transmission Fluid Spec:

MITSUFLUID-LV (or GL-4, API rating) - Check specific variant

Gear Ratios:

1st: 3.083, 2nd: 2.036, 3rd: 1.481, 4th: 1.137, 5th: 0.911, 6th: 0.767 (Typical values, may vary slightly by region)

📐 Dimensions

Length:

4360 mm (171.7 inches)

Width:

1770 mm (69.7 inches)

Height:

1415 mm (55.7 inches)

Wheelbase:

2600 mm (102.4 inches)

Front Track:

1500 mm (59.1 inches)

Rear Track:

1490 mm (58.7 inches)

Curb Weight:

Approximately 1400-1450 kg (3086-3197 lbs) depending on trim

Gross Vehicle Weight Rating:

N/A (Typically not specified for performance vehicles in this class)

Trunk Volume:

Approximately 0.27 m³ (9.5 cubic feet)

🛡️ Safety Features

NHTSA Rating:

N/A (Specific NHTSA ratings for 2003 are not readily available in a consolidated format, but generally considered safe for its class with dual airbags and ABS).

Active Features:

Anti-lock Braking System (ABS) with Electronic Brakeforce Distribution (EBD), Active Yaw Control (AYC), Active Center Differential (ACD), optional front strut tower brace.

Passive Features:

Driver and front passenger airbags, 3-point seat belts with pre-tensioners, reinforced chassis construction, side-impact door beams, child seat anchors (ISOFIX).

💡 Technology Features

Infotainment System:

Basic AM/FM/CD stereo system, often with 6 speakers. Optional premium audio systems were available. Limited connectivity by modern standards.

Driver Assistance Features:

ABS, EBD, AYC, ACD. No modern electronic stability control (ESC) or traction control beyond the AWD system's mechanical/electronic differentials. Cruise control was typically standard.

Connectivity:

Limited to basic audio input (CD), potentially an auxiliary input on some later models. No Bluetooth or USB connectivity.

🔧 Maintenance

Oil Change Interval:

Every 3,750 miles (6,000 km) or 6 months, whichever comes first (under severe driving conditions, which is typical for an Evo). Standard intervals might be longer, but frequent oil changes are recommended for the 4G63.

Air Filter Replacement:

Every 15,000 miles (24,000 km) or annually.

Spark Plug Replacement:

Every 30,000 miles (48,000 km) for standard plugs, 60,000 miles (96,000 km) for platinum or iridium plugs. The manual will specify the exact type and interval.

Coolant Flush Interval:

Every 30,000 miles (48,000 km) or 2 years.

Transmission Fluid Change:

Every 30,000 miles (48,000 km) or 2 years, especially for performance driving.

Engine Oil Spec:

SAE 5W-30 or 5W-40, API SN/SP or ACEA A3/B4, synthetic recommended for performance.

Engine Oil Capacity:

4.5 Liters (4.8 US Quarts) with filter change.

Brake Fluid Spec:

DOT 3 or DOT 4, non-silicone based.

Power Steering Fluid Spec:

MITSUBISHI PSF (or equivalent) - Dexron III ATF can be a substitute in a pinch, but dedicated PSF is preferred.

Known Issues:

Eccentric shaft sensor failure (causing stalling), turbocharger seal failure (causing oil burning), clutch wear (especially with aggressive driving), differential wear (AYC pump failures), piston ring land failure (due to detonation or high boost). The manual is crucial for diagnosing and preventing these.

📚 Vehicle History

Brand Heritage:

Mitsubishi has a strong motorsport heritage, particularly in rallying. The Lancer Evolution was born from this experience, designed to homologate for Group A rally racing. Its success on the World Rally Championship (WRC) stage is legendary.

Model Evolution:

The 2003 model marks the introduction of the VIII generation (CT9A chassis). This generation saw significant upgrades, including a more powerful engine, a stronger chassis, improved aerodynamics, and the introduction of the ACD to the AYC system for enhanced traction and handling. It was the first generation officially imported and sold in significant numbers in North America.

Production Years:

The Lancer Evolution VIII was produced from 2003 to 2005.

Manufacturing Location:

Japan

🏆 Awards & Recognition

Recognitions:

Consistently lauded by automotive journalists and enthusiasts for its performance, handling, and value in the performance sedan segment. Often featured in 'best performance car' lists and comparisons.

Ratings:

Car and Driver's 10Best list (multiple years across different generations), various motorsport accolades.