Positioning:
Iconic Rally-Bred Performance Sedan/Wagon
Competitors:
Mitsubishi Lancer Evolution, Ford Focus RS, Volkswagen Golf GTI
Performance Focus:
Turbocharged Boxer Engine, Symmetrical All-Wheel Drive, Sport-Tuned Suspension
Rally Heritage:
Homologation Special for WRC Competition
Engine Coverage:
All Engine Variants (EJ255)
Transmission Coverage:
All Transmission Variants (5-Speed Manual, 4-Speed Automatic)
Trim Level Coverage:
All Trim Levels (WRX, WRX STI - specific model details may vary within WRX scope)
Type:
Workshop Repair Service Manual
Powertrain:
Engine (EJ255), Fuel System, Exhaust System, Cooling System, Lubrication System, Turbocharger System, Ignition System
Drivetrain:
Transmission (Manual/Automatic), Clutch, Drivetrain Components (Driveshafts, Differentials), All-Wheel Drive System (Symmetrical AWD)
Suspension And Steering:
Front and Rear Suspension, Steering Gear and Linkage, Power Steering System
Body And Chassis:
Body Panels, Doors, Hood, Trunk, Interior Trim, Chassis Components, Safety Structures
Brake System:
Front and Rear Brakes (Disc), ABS System, Parking Brake
Electrical System:
Battery, Charging System, Starting System, Ignition System, Lighting System, Instrumentation, Wiper/Washer System, Audio System, Power Accessories
Maintenance:
Scheduled Maintenance, Fluid Changes, Filter Replacements, Spark Plug Replacement, Belt Inspection/Replacement
Diagnostics And Troubleshooting:
Diagnostic Trouble Codes (DTCs), System Testing Procedures, Common Fault Diagnosis
Repair And Overhaul:
Engine Rebuilding, Transmission Overhaul, Suspension Component Replacement, Brake Component Replacement, Electrical Component Repair/Replacement
Specifications And Adjustments:
Torque Specifications, Clearances, Alignment Procedures, Fluid Capacities, Electrical Component Specifications
Depth:
Comprehensive (from basic maintenance to complete engine and transmission rebuilds, advanced diagnostics)
Configuration:
2.5L Turbocharged Boxer-4 (Horizontally Opposed)
Horsepower Hp:
227 hp @ 5600 rpm (WRX)
Torque Lb Ft:
236 lb-ft @ 3600 rpm (WRX)
Fuel Delivery:
Multi-Point Fuel Injection (MPI), Electronic Throttle Control (ETC)
ECU:
Engine Control Unit (ECU) with Variable Valve Timing (VVT) - Intake Side
Turbo Model:
IHI VF39 (Common for WRX)
NHTSA Frontal Driver Impact:
Good
NHTSA Frontal Passenger Impact:
Good
IIHS Moderate Overlap Frontal:
Acceptable
ABS:
Standard Anti-lock Braking System
Traction Control:
Standard
Airbags:
Frontal Airbags, Side Curtain Airbags (Optional on some models)
Seatbelts:
3-Point Height-Adjustable Front Seatbelts with Pretensioners, Rear 3-Point Seatbelts
Audio System:
Factory AM/FM/CD Player with 4-6 Speakers
Navigation:
Optional Factory Navigation System
Performance Instrumentation:
Boost Gauge, Tachometer, Performance-Oriented Gauges
Auxiliary Input:
Optional Auxiliary Audio Input
Oil Change Miles:
3,750 - 7,500 miles (depending on driving conditions and oil type)
Spark Plug Replacement Miles:
60,000 miles
Timing Belt Replacement Miles:
105,000 miles (or 7 years)
Engine Oil Type:
SAE 0W-30 (Synthetic Recommended)
Coolant Type:
Subaru Super Coolant (Blue) or Equivalent (Phosphated Organic Acid Technology - P-OAT)
Transmission Fluid Manual:
Subaru Extra-S Gear Oil API GL-5 75W-90 (or equivalent high-quality synthetic)
Transmission Fluid Automatic:
Subaru ATF-HP (Genuine)
Differential Fluid Front:
Subaru Extra-S Gear Oil API GL-5 75W-90 (or equivalent high-quality synthetic)
Differential Fluid Rear:
Subaru Extra-S Gear Oil API GL-5 75W-90 (or equivalent high-quality synthetic)
Brake Fluid Type:
DOT 3 or DOT 4
Head Gaskets:
While not as prevalent as earlier generations, some EJ25 engines can experience head gasket leaks. Early detection is key.
Piston Ringland Failure:
Can occur with aggressive tuning or detonation. The manual will detail proper engine management and break-in procedures.
Clutch Wear:
Performance driving can accelerate clutch wear. Manual covers clutch inspection and replacement.
Turbo Cooling:
Allow turbo to cool down after hard driving to prevent oil coking. Manual details proper shut-down procedures.
