Engine Mechanical:
        
        
            Complete engine overhaul, disassembly, assembly, inspection, tuning, lubrication systems, cooling systems, fuel delivery, emission controls.
        
     
    
        
            Engine Performance:
        
        
            Detailed troubleshooting for performance issues, diagnostic procedures, sensor testing, ECU diagnosis.
        
     
    
        
            Transmission Automatic:
        
        
            Diagnosis, overhaul, repair, fluid checks, valve body inspection, electronic control unit (TCU) diagnosis.
        
     
    
        
            Transmission Manual:
        
        
            Overhaul, repair, clutch system service, gear engagement troubleshooting.
        
     
    
        
            Drivetrain:
        
        
            Front and rear differential service, driveshaft inspection and repair, CV joint maintenance, AWD system specific procedures.
        
     
    
        
            Suspension:
        
        
            Front and rear suspension component diagnosis, replacement of struts, shocks, control arms, bushings, wheel bearing service.
        
     
    
        
            Steering:
        
        
            Power steering system diagnosis and repair, steering rack and pinion service, steering column components.
        
     
    
        
            Brakes:
        
        
            Brake system diagnosis, hydraulic system bleeding, brake pad and rotor replacement, ABS system troubleshooting, parking brake adjustment.
        
     
    
        
            Electrical System:
        
        
            Wiring diagrams, circuit testing, component diagnosis (starter, alternator, battery), lighting systems, accessory circuits.
        
     
    
        
            Body Exterior:
        
        
            Panel removal and installation, door and latch mechanisms, glass replacement, bumper repairs, trim piece service.
        
     
    
        
            Body Interior:
        
        
            Dashboard removal, seat mechanisms, trim panel service, carpet replacement, headliner repair.
        
     
    
        
            HVAC:
        
        
            Air conditioning system diagnosis, refrigerant handling, heater core replacement, blower motor service, climate control system troubleshooting.
        
     
    
        
            Safety Systems:
        
        
            Airbag system diagnosis and component replacement (SRS module, sensors, clock spring), seat belt service.
        
     
    
        
            Diagnostics:
        
        
            OBD-II diagnostic trouble codes (DTCs), diagnostic connector location, scanner usage, live data interpretation.
        
     
    
    
        
            Scheduled Maintenance:
        
        
            Detailed recommended service intervals for oil changes, filter replacements, fluid flushes, spark plug replacement, belt inspections.
        
     
    
        
            Repair Procedures:
        
        
            Step-by-step repair instructions for all major mechanical and electrical components, including torque specifications and specialized tool requirements.
        
     
    
        
            Troubleshooting Guides:
        
        
            Systematic troubleshooting flowcharts and diagnostic trees for common and uncommon vehicle issues.
        
     
    
        
            Component Removal Installation:
        
        
            Detailed instructions for removing and reinstalling virtually every component for repair or replacement.
        
     
    
        
            Specifications Data:
        
        
            All necessary technical data, including clearances, tolerances, fluid capacities, and torque values for precise repairs.
        
     
    
    
        
            Depth:
        
        
            Comprehensive, suitable for professional technicians, covering everything from basic maintenance to complete engine and transmission overhauls.
        
     
    
        
            Diagnostic Capability:
        
        
            Advanced diagnostic procedures, including sensor testing, actuator testing, and electronic control unit (ECU) troubleshooting.
        
     
    
        
            Rebuild Instructions:
        
        
            Detailed instructions for the complete disassembly, inspection, and reassembly of engines and transmissions.
        
     
 
    
    
    
        
            Engine Code Variants:
        
        
            Likely includes EJ20 SOHC/DOHC and EJ25 SOHC/DOHC boxer engines, common for this generation.
        
     
    
    
        
            2.0L Ej20:
        
        
            2.0-liter (1994cc) Naturally Aspirated Boxer Engine.
        
     
    
        
            2.5L Ej25:
        
        
            2.5-liter (2457cc) Naturally Aspirated Boxer Engine.
        
     
    
        
            2.5L Gt Turbo:
        
        
            2.5-liter (2457cc) Turbocharged Boxer Engine (GT models).
        
     
    
        
        Performance Naturally Aspirated
    
 
    
        
            Horsepower 2.0L:
        
        
            Approx. 125-140 hp (depending on configuration).
        
     
    
        
            Torque 2.0L:
        
        
            Approx. 130-145 lb-ft.
        
     
    
        
            Horsepower 2.5L:
        
        
            Approx. 160-170 hp (depending on configuration).
        
     
    
        
            Torque 2.5L:
        
        
            Approx. 160-175 lb-ft.
        
     
    
    
        
            Horsepower 2.5L Gt:
        
        
            Approx. 217 hp.
        
     
    
        
            Torque 2.5L Gt:
        
        
            Approx. 241 lb-ft.
        
     
    
    
        
            Fuel Delivery:
        
        
            Multi-point Fuel Injection (MPI), electronically controlled.
        
     
    
        
            Fuel Type:
        
        
            Unleaded gasoline (91 RON or higher recommended, especially for turbo models).
        
     
    
        
            Ignition System:
        
        
            Electronic ignition with distributorless ignition system (DIS) on some variants, coil-on-plug on others.
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            Typically every 5,000-10,000 km (3,000-6,000 miles) or 6 months, depending on driving conditions and oil type used. Check manual for specifics.
        
     
    
        
            Spark Plug Replacement:
        
        
            Intervals vary by plug type (e.g., iridium may last longer), typically 60,000-100,000 km (40,000-60,000 miles).
        
     
    
        
            Timing Belt:
        
        
            Crucial: Subaru boxer engines of this era typically use a timing belt. Replacement interval is critical, usually around 90,000-105,000 km (56,000-65,000 miles) or 5-7 years. Failure can cause catastrophic engine damage.
        
     
    
    
        
            Engine Oil:
        
        
            Refer to manual for specific viscosity (e.g., 5W-30 or 10W-30) and API service classification. Often specified as API SJ or SL.
        
     
    
        
            Coolant:
        
        
            Subaru Super Coolant (blue) or equivalent ethylene glycol-based coolant. Check manual for capacity and mix ratio.
        
     
    
        
            Transmission Fluid Auto:
        
        
            Subaru ATF HP (High Performance) or equivalent Dexron III/Mercon. Check manual for capacity and change interval.
        
     
    
        
            Transmission Fluid Manual:
        
        
            Gear oil for 5-speed manual: typically 75W-90 GL-5. Check manual for capacity.
        
     
    
        
            Differential Fluid:
        
        
            Front and Rear: 75W-90 GL-5. Check manual for capacity.
        
     
    
    
        
            Head Gaskets:
        
        
            While less prone than earlier generations, head gasket leaks (especially coolant seepage) can occur on EJ25 engines.
        
     
    
        
            Oil Leaks:
        
        
            Common areas include valve cover gaskets, oil pan gaskets, and rear main seals over time.
        
     
    
        
            Catalytic Converter:
        
        
            Can become clogged over time, leading to performance loss.
        
     
    
        
            ABS Sensors:
        
        
            ABS wheel speed sensors can fail, causing ABS warning lights.
        
     
    
        
            Air Conditioning:
        
        
            A/C compressor clutch or refrigerant leaks can occur with age.