Market Position:
The Mitsubishi Eclipse of this era was positioned as an affordable, stylish, and sporty coupe and convertible, offering a compelling alternative in the compact sports car segment.
Competitive Analysis:
Competed against vehicles such as the Toyota Celica, Honda Civic Si, Ford Focus SVT, Nissan Sentra SE-R, and Chevrolet Cavalier Z24.
Key Features:
Distinctive styling, available powerful V6 engine, optional all-wheel drive (on some earlier generations, not specified for these years but notable for the model line), engaging driving dynamics for its class.
Target Audience:
Enthusiasts seeking to maintain, repair, or customize their Mitsubishi Eclipse, DIY mechanics, and professional automotive repair shops.
Engine Mechanical:
Engine assembly, cylinder head, crankshaft, pistons, connecting rods, lubrication system, cooling system, timing belt/chain, engine diagnostics.
Engine Electrical:
Ignition system, fuel injection system (EFI), emissions control system, starter system, charging system, engine control unit (ECU) wiring diagrams.
Transmission Manual:
Manual transmission removal, disassembly, inspection, assembly, adjustment, clutch system.
Transmission Automatic:
Automatic transmission removal, disassembly, inspection, assembly, adjustment, hydraulic control system, torque converter, transmission fluid.
Drivetrain:
Front-wheel drive (FWD) system, drive shafts, CV joints, differentials.
Suspension:
Front and rear suspension systems, struts, shocks, springs, control arms, bushings, alignment procedures.
Steering:
Power steering system, steering rack, steering column, tie rod ends, steering angle sensor.
Brakes:
Front and rear brakes (disc brakes), brake calipers, brake pads, brake rotors, brake lines, ABS system, parking brake.
Electrical System:
Battery, charging system, starting system, lighting system, wipers, horn, power windows, power locks, central locking, body control module (BCM).
HVAC:
Heating, Ventilation, and Air Conditioning (HVAC) system, AC compressor, refrigerant, blower motor, climate control unit.
Body And Interior:
Exterior panels, doors, hood, trunk, bumpers, interior trim, seats, dashboard, headliner.
Fuel System:
Fuel tank, fuel pump, fuel filter, fuel injectors, fuel lines, evaporative emission control (EVAP) system.
Exhaust System:
Exhaust manifold, catalytic converter, muffler, exhaust pipes, oxygen sensors.
Safety Systems:
Airbag system, seat belt pre-tensioners, ABS diagnostics.
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection and replacement.
Troubleshooting:
Diagnostic trouble codes (DTCs), symptom-based troubleshooting guides, electrical system diagnostics.
Repair Procedures:
Step-by-step repair instructions for all major components and systems.
Rebuild Procedures:
Detailed instructions for engine and transmission rebuilds.
Component Replacement:
Instructions for replacing parts such as alternators, starters, radiators, brake components, sensors, etc.
Wheel Alignment:
Specifications and procedures for front and rear wheel alignment.
Diagnostic Tools:
Information on using OBD-II scanners and other diagnostic equipment.
Technical Depth:
Comprehensive coverage from basic DIY maintenance to complex diagnostic and repair procedures, suitable for both amateur enthusiasts and professional mechanics.
NHTSA Front Impact Rating:
4 Stars (Driver), 4 Stars (Passenger) for 2003 model year.
IIHS Crash Test Rating:
Good (Frontal Offset) for 2003 model year.
Active Safety Features:
Anti-lock Braking System (ABS), Traction Control (on some V6 models).
Passive Safety Features:
Dual front airbags, front side-impact airbags (on some models), three-point seat belts with pretensioners, crumple zones.
Airbag System Components:
Frontal airbags, side curtain airbags (if equipped), seat-mounted side airbags (if equipped), Occupant Classification System (OCS).
Infotainment Features:
Factory AM/FM stereo with CD player, optional premium audio system (e.g., Rockford Fosgate), cassette player may be present on some base models.
Driver Assistance Features:
ABS, Traction Control (optional).
Connectivity Features:
Limited by era; typically power windows, power locks, remote keyless entry (optional).
Instrument Cluster:
Analog gauges for speedometer, tachometer, fuel level, engine temperature. Warning lights for various systems. Trip computer on higher trims.
Oil Change Interval:
Every 3,750 miles or 3 months for severe driving, or 7,500 miles or 6 months for normal driving (consult manual for specific guidance).
Engine Oil Type:
Refer to manual: typically SAE 5W-30 or 5W-20 synthetic blend or full synthetic. Check owner's manual for exact API service classification (e.g., API SN/SP).
Engine Oil Capacity:
2.4L: Approx. 4.5 quarts (with filter); 3.0L V6: Approx. 4.5 quarts (with filter).
Air Filter Replacement:
Every 15,000 - 30,000 miles, or as needed based on driving conditions.
Spark Plug Replacement:
2.4L: Iridium plugs, typically 100,000 miles. 3.0L V6: Iridium plugs, typically 60,000 - 100,000 miles. Consult manual for specific recommendations.
Timing Belt Replacement:
Critical for 2.4L engine (interference engine). Recommended interval around 60,000 - 90,000 miles. The 3.0L V6 is generally a timing chain, which is designed to last the life of the engine but may require inspection.
Coolant Type:
Ethylene glycol based coolant, compatible with Japanese vehicles (e.g., Mitsubishi DiaQueen Super Long Life Coolant or equivalent).
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Power Steering Fluid:
Dexron III ATF or approved power steering fluid.
Common Issues 2.4L:
Oil leaks from valve cover gasket or oil pan, potential for timing belt failure if not replaced on schedule (interference engine), ignition coil issues.
Common Issues 3.0L V6:
Intake manifold gasket leaks, spark plug blow-out (Tsb for some applications), PCV valve issues, oil cooler line leaks (if equipped).
Transmission Issues:
Automatic transmission issues can include slipping or harsh shifts, often related to fluid condition or solenoid failures.
Suspension Issues:
Worn suspension components like ball joints, tie rod ends, and bushings leading to knocking noises or poor handling.
Electrical Issues:
Window motor failures, power lock actuator issues, intermittent electrical gremlins often related to wiring harness integrity or grounding points.
