2003-2005 Mitsubishi Eclipse & Spyder Service Repair Manual

🏷️ Basic Information

Make:

Mitsubishi

Model:

Eclipse & Spyder

Model Years Covered:

2003, 2004, 2005

Chassis Codes:

3G Eclipse (JA/JP chassis)

👋 Introduction

Model Segment:

Compact Sports Coupe/Convertible

Key Competitors:

Honda Civic Si, Acura RSX, Nissan 240SX (earlier models), Toyota Celica, Ford Mustang (lower trims), Chevrolet Camaro (lower trims).

Third Generation Eclipse:

The 2003-2005 Mitsubishi Eclipse represented the third generation (3G) of the model, moving to the Diamond Star Motors (DSM) platform shared with the Chrysler Sebring coupe and Dodge Stratus coupe. Known for its aggressive styling and performance-oriented options.

Spyder Variant:

The Spyder is the convertible variant, featuring a power-operated soft top, with chassis reinforcements to compensate for the lack of a fixed roof.

📋 Manual Details

Coverage Summary:

Comprehensive service and repair for all major vehicle systems, including engine, drivetrain, chassis, electrical, and body.

Estimated Page Count:

Approximately 2000+ pages (across 4 volumes)

Manual Type:

Factory Service Manual / Repair Manual

Language:

English

File Format:

PDF

📖 Manual Coverage

Powertrain:

Engine mechanical, lubrication, fuel delivery, cooling system, intake/exhaust, engine control (ECM/PCM), clutch, manual transaxle, automatic transaxle.

Chassis:

Front axle, rear axle, wheel and tire specifications, power plant mounts, front suspension, rear suspension, service brakes (disc/drum), parking brake, steering system.

Body & Electrical:

Body construction, exterior panels, interior trim, Supplemental Restraint System (SRS), chassis electrical systems, lighting, instrumentation, comfort systems (HVAC), wiring diagrams, component locations, configuration/splice locations.

Maintenance:

Routine checks, fluid changes, filter replacements, inspections, lubrication schedules.

Repair:

Detailed step-by-step instructions for disassembly, assembly, and repair of all major components and systems.

Diagnostics:

Troubleshooting guides, diagnostic trouble codes (DTCs), diagnostic procedures for various systems.

Specifications:

Torque specifications, fluid capacities, clearances, tolerances, electrical values.

Depth Of Coverage:

Extensive, covering everything from basic maintenance to complete engine and transmission rebuilds, electrical system diagnostics, and bodywork.

📊 Manual Specifications

Print Quality:

High Quality PDF, all pages are printable.

Searchability:

Likely text-searchable PDF (standard for high-quality digital manuals).

Binding Type:

Digital Download (PDF)

Paper Type:

N/A (Digital)

⚙️ Engine Specifications

Engine Code:

4G64

Engine Type:

Inline 4-cylinder, SOHC

Displacement:

2.4 Liters (2378 cc)

Bore X Stroke:

86.5 mm x 100.0 mm

Compression Ratio:

9.5:1

Horsepower:

147 hp @ 5800 RPM

Torque:

158 lb-ft @ 4000 RPM

Engine Code:

6G72

Engine Type:

V6, SOHC

Displacement:

3.0 Liters (2972 cc)

Bore X Stroke:

87.0 mm x 83.0 mm

Compression Ratio:

9.0:1

Horsepower:

197 hp @ 5500 RPM (est.)

Torque:

207 lb-ft @ 3750 RPM (est.)

Engine Code:

6G72 SOHC Twin-Turbo

Engine Type:

V6, SOHC, Twin-Turbocharged

Displacement:

3.0 Liters (2972 cc)

Compression Ratio:

8.5:1

Horsepower:

205 hp @ 5000 RPM (est.)

Torque:

226 lb-ft @ 3500 RPM (est.)

Fuel Injection:

Multi-Point Fuel Injection (MPI)

Fuel Type:

Unleaded Regular (87 octane) for 2.4L; Unleaded Premium (91+ octane) recommended for V6 models.

🔧 Transmission

Manual Transaxle:

5-speed manual

Automatic Transaxle:

4-speed automatic (F4A51)

Manual Transaxle:

6-speed manual (available for GT models)

Automatic Transaxle:

4-speed automatic (F4A51)

All Wheel Drive:

Available on GT models with 6-speed manual transmission (based on previous generation DSM AWD system).

📐 Dimensions

Length:

Approx. 180.9 inches

Width:

Approx. 70.5 inches

Height:

Approx. 53.0 inches

Wheelbase:

Approx. 103.7 inches

Height With Top Up:

Slightly higher than coupe due to soft top mechanism

Curb Weight Gs Coupe:

Approx. 3131 lbs

Curb Weight Gt Coupe 6Mt AWD:

Approx. 3527 lbs

Curb Weight Gs Spyder:

Approx. 3417 lbs

🛡️ Safety Features

NHTSA Front Impact Driver:

4-star (2003 models)

NHTSA Front Impact Passenger:

4-star (2003 models)

IIHS Front Impact:

Good (2003 models)

ABS:

Standard on all models.

Traction Control:

Available, especially on GT AWD models.

Airbags:

Front airbags standard. Side airbags often optional or standard on higher trims.

Srs System Coverage:

The manual provides detailed information on the SRS system, including component locations, diagnostic procedures, and safety precautions for handling airbag components.

💡 Technology Features

Audio System:

Standard AM/FM/CD players. Optional Rockford Fosgate premium audio system available, often with a subwoofer in the trunk.

Climate Control:

Manual HVAC controls standard. Automatic climate control optional on some higher trims.

Cruise Control:

Standard on most models.

Connectivity Features:

Limited by era. Primarily focused on audio connectivity. Bluetooth or other advanced connectivity not present.

🔧 Maintenance

Oil Change Interval:

Refer to manual; typically 3,750-7,500 miles or 6-12 months, depending on driving conditions and oil type.

Air Filter Replacement:

Check every 15,000 miles, replace as needed. Higher frequency recommended in dusty conditions.

Spark Plug Replacement:

Refer to manual; typically 60,000-100,000 miles depending on plug type (e.g., Iridium).

Timing Belt Replacement:

Critical for the 4G64 engine. Typically 60,000 miles. Failure can cause severe engine damage. The V6 engine uses a timing chain.

Engine Oil Type 2 4L:

API SG or SH, SAE 5W-30 is generally recommended. Check owner's manual for precise specification.

Engine Oil Type 3 0L V6:

API SG or SH, SAE 5W-30 is generally recommended. Check owner's manual for precise specification.

Coolant Type:

Mitsubishi DiaQueen Super Long Life Coolant (or equivalent ethylene glycol-based coolant with demineralized water).

Transmission Fluid Manual:

GL-4 Gear Oil (e.g., SAE 75W-90).

Transmission Fluid Automatic:

DiaQueen ATF-SP-II M or equivalent DEXRON III/Mercon compatible fluid.

Brake Fluid Type:

DOT 3 or DOT 4.

Engine Performance 2 4L:

Occasional oil consumption, potential for timing belt failure if not replaced on schedule.

Engine Performance V6:

Spark plug fouling, potential intake manifold gasket leaks, some reports of oil leaks from valve covers or oil pan gaskets.

Transmission Issues:

Automatic transmission can sometimes exhibit harsh shifting or slippage if not properly maintained. Clutch wear on manual transmissions.

Suspension Chassis:

Front suspension components (ball joints, bushings, struts) can wear over time, leading to noise or poor handling. Rear wheel bearings on Spyder models can be a concern.

Electrical Issues:

Window regulators, power lock actuators, and ABS sensor failures are sometimes reported.

📚 Vehicle History

Mitsubishi Motors Performance:

Mitsubishi has a strong heritage in performance vehicles, particularly with its Lancer Evolution and its history in motorsport (e.g., Group A rallying).

Eclipse Generations:

The Eclipse nameplate was first introduced by Diamond Star Motors (DSM), a joint venture between Mitsubishi and Chrysler. The first generation (1989-1994) was iconic for its turbocharged performance and DSM association. The second generation (1995-1999) continued this, but saw a shift away from AWD on non-turbo models. The third generation (2000-2005) moved to a Chrysler platform, gaining more power and size, but also facing criticism for a perceived loss of its raw, tuner-friendly heritage compared to earlier generations.

Manufacturing Location:

Normal, Illinois, USA (assembled by Mitsubishi Motors North America).

🏆 Awards & Recognition

Model Year Specific Awards:

While the 3G Eclipse received moderate reviews, it didn't garner major segment-defining awards compared to some predecessors or competitors. Its styling was often praised, but performance, particularly of the non-turbo models, was considered adequate rather than exhilarating.