Segment:
Compact performance sedan/hatchback, rally-inspired.
Key Competitors 2002:
Mitsubishi Lancer Evolution, Ford Focus RS, Honda Civic Type R.
Performance Orientation:
Renowned for its turbocharged boxer engine, Symmetrical All-Wheel Drive, and agile handling, a staple in the tuner and rally community.
Manual Value Proposition:
Provides the in-depth knowledge required to maintain, troubleshoot, and repair the iconic Subaru Impreza WRX, empowering owners to perform tasks themselves and save on dealership costs.
Systems Covered Overview:
All major automotive systems including engine, transmission, driveline, suspension, brakes, steering, electrical, HVAC, body, and more.
Estimated Page Count:
Varies by specific factory manual, typically several hundred pages.
Type:
Factory Service Repair Workshop Manual
Engine Mechanical:
Detailed coverage of engine disassembly, assembly, repair, and diagnostics, including cylinder head, pistons, crankshaft, camshafts, timing belt/chain, and lubrication system.
Engine Performance:
Turbocharger system, intercooler, fuel injection, ignition system, emissions control systems (EVAP, EGR), engine control unit (ECU) diagnostics.
Transmission Driveline:
Manual transmission (e.g., TY754) repair, clutch system, driveshafts, differentials (front, center, rear), all-wheel-drive system (Symmetrical AWD) service.
Suspension Steering:
Front and rear suspension components (struts, springs, control arms, bushings), wheel alignment specifications, steering rack and pump service, power steering system.
Brakes:
Brake system diagnostics, hydraulic components (master cylinder, calipers, lines), ABS system, brake pad/rotor replacement, parking brake service.
Electrical Charging Starting:
Battery and charging system, starter motor, alternator, wiring diagrams for all vehicle systems, fuse box and relay locations, lighting system diagnostics.
HVAC Body Interior Exterior:
Heating, Ventilation, and Air Conditioning (HVAC) system service, body panel removal/installation, interior trim, door mechanisms, glass replacement, exterior lighting, seals and weatherstripping.
Maintenance:
Scheduled maintenance tasks such as oil changes, filter replacements, spark plug service, fluid checks and changes, brake inspections, and tire rotations.
Troubleshooting:
Comprehensive diagnostic procedures for common and uncommon issues, fault code explanations, and systematic troubleshooting guides for all major systems.
Repair Rebuild:
Detailed step-by-step instructions for component removal, disassembly, repair, reassembly, and installation, often based on complete vehicle teardown.
Electrical Diagnostics:
In-depth electrical system troubleshooting, including component testing, connector diagnosis, and interpretation of complex wiring diagrams.
Depth Of Information:
Factory-level technical detail, suitable for both novice DIYers and experienced professional mechanics, covering everything from basic checks to complex engine and transmission rebuilds.
Engine Type:
2.0L turbocharged flat-four (Boxer) engine
Horsepower Psi Target:
Approximately 215-225 hp (EDM specifications may vary slightly from USDM).
Torque Psi Target:
Approximately 240-250 lb-ft.
Fuel Delivery:
Sequential multi-port fuel injection (MPI) with Denso or similar fuel injectors.
Turbocharger:
Mitsubishi TD04L-13T (or similar variant) turbocharger with intercooler.
ECU Type:
Subaru proprietary engine control unit.
Oil Change Interval:
Typically every 3,000-7,500 miles (5,000-12,000 km) or 6-12 months, depending on driving conditions and oil type used. Consult specific manual recommendations.
Timing Belt Replacement:
Recommended replacement every 60,000 - 90,000 miles (96,000 - 145,000 km) or 5-7 years. Failure can cause catastrophic engine damage.
Engine Oil Specification:
API SG or higher, SAE 5W-30 or 10W-30 recommended. Consult manual for specific grades and capacities.
Coolant Type:
Subaru Super Coolant (blue) or equivalent ethylene glycol-based coolant. Capacity approx. 7.4 L.
Transmission Fluid Type:
API GL-5 75W-90 synthetic gear oil recommended for manual transmission. Capacity approx. 3.5 L.
Piston Ring Land Cracks:
Common issue on higher-mileage or modified EJ205 engines, especially when pushed hard. Symptoms include oil consumption and blow-by.
Head Gasket Leaks:
While less prevalent on the EJ205 than some other Subaru engines, head gasket issues can still occur, particularly with overheating.
Clutch Wear:
Standard wear and tear, especially if subjected to aggressive driving or frequent hard launches.
Catalytic Converter Failure:
Can occur due to age, engine misfires, or contamination.
