🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STi Year: 2008 Codes Chassis Code: GRB (Hatchback) / GVB (Sedan) - Applicable to this generation, though specific model year often implies hatchback for 2008 WRX STi Engine Code: EJ257 (2.5L Turbocharged Boxer) 👋 Introduction Market Position Segment: Performance Compact/Sport Compact Competitors: Mitsubishi Lancer Evolution, Honda Civic Si, Mazdaspeed3, Volkswagen GTI Key Features Performance Orientation: Tuned turbocharged engine, Symmetrical All-Wheel Drive, performance-oriented chassis, aggressive styling Rally Heritage: Direct lineage from Subaru's World Rally Championship success Manual Value Proposition Target Audience: Enthusiasts, DIY mechanics, professional technicians Benefit: Empowers owners and technicians to maintain, diagnose, and repair the vehicle to manufacturer standards. 📋 Manual Details Coverage Areas Markets Covered: Global (primarily North America, Europe, Japan) Trim Levels Covered: WRX STi (all performance variants) Page Count Estimated Pages: 1500-2500 (Typical for comprehensive workshop manuals) Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Powertrain: Engine (EJ257), Turbocharger, Intercooler, Fuel System, Exhaust System, Drivetrain (Symmetrical AWD, DCCD, Differentials), Transmission (6-speed Manual) Chassis: Suspension (Front/Rear), Steering, Brakes (ABS, Brembo), Wheels, Tires Electrical: Wiring Diagrams, Battery, Charging System, Ignition System, Lighting, Instrumentation, Audio System, ECU Control Body: Exterior Body Panels, Interior Trim, Doors, Windows, Seats, HVAC System Procedures Included Maintenance: Oil Changes, Filter Replacements, Spark Plug Service, Fluid Checks and Replenishments, Belt Inspections Diagnostics: Troubleshooting Guides, DTC (Diagnostic Trouble Code) Interpretation, Component Testing Procedures Repair: Engine Rebuilds, Transmission Overhauls, Suspension Component Replacement, Brake System Repair, Electrical Component Diagnosis and Repair Installation: Component Installation Guides, Aftermarket Part Integration Considerations (where applicable to service) Technical Depth Depth: Comprehensive (from basic maintenance to complete overhaul and advanced diagnostics) Accuracy: Dealership-Level Accuracy and Detail 📊 Manual Specifications File Format Searchability: Searchable Text (typically) Printability: Printable Pages Resolution: High Resolution (suitable for clear reading and printing) Binding Type Binding: N/A (Digital PDF format) Paper Type Paper Type: N/A (Digital PDF format) Print Quality Quality: Excellent (clarity of diagrams and text) ⚙️ Engine Specifications Primary Engine Engine Type: Horizontally Opposed (Boxer) Turbocharged DOHC 16-Valve Displacement: 2.5 Liters (2457 cc) Bore X Stroke: 99.5 mm x 79.0 mm (approx.) Compression Ratio: 8.4:1 Fuel Type: Premium Unleaded Gasoline (91 Octane or higher recommended) Performance Horsepower: 305 hp @ 6000 rpm (approx., varies by market/spec) Torque: 290 lb-ft @ 4000 rpm (approx., varies by market/spec) Fuel System Injection Type: Sequential Multi-Port Fuel Injection (S-MPI) Turbocharger: IHI VF48 (twin-scroll turbocharger) Engine Features Engine Management System: Subaru Select Monitor (SSM) compatible ECU Cooling System: Water-cooled with intercooler 🔧 Transmission Standard Type: 6-Speed Manual Transmission Dccd: Driver Controlled Centre Differential (DCCD) with auto mode Optional Type: Not applicable for WRX STi (Manual only) Features All Wheel Drive: Symmetrical All-Wheel Drive (SAWD) with front helical limited-slip differential (LSD) and rear mechanical LSD Fluid Specifications Manual Transmission Fluid: Subaru Genuine Gear Oil (e.g., API GL-5, SAE 75W-90) 📐 Dimensions Exterior Length: 4,415 mm (Hatchback) Width: 1,795 mm Height: 1,475 mm (Hatchback) Wheelbase: 2,650 mm Track Width Front: 1,530 mm Track Width Rear: 1,535 mm Weights Curb Weight: Approx. 1,490 kg (Hatchback) Gross Vehicle Weight Rating: N/A (Typically not specified in service manuals for this level of detail) Cargo Cargo Volume: 290 Liters (Hatchback, to parcel shelf) 🛡️ Safety Features Ratings NHTSA Overall Rating: Not directly comparable for performance variants, focus is on specific crashworthiness Active Features Traction Control: Yes (Subaru Vehicle Dynamics Control - VDC) ABS: Yes (Anti-lock Braking System with EBD) Brake Assist: Yes Passive Features Airbags: Driver and Front Passenger Airbags, Side Airbags, Curtain Airbags Seat Belts: Pretensioner and Load Limiter Seatbelts Body Structure: Reinforced chassis for enhanced impact protection 💡 Technology Features Infotainment Head Unit: Factory-installed AM/FM/CD/MP3 audio system, optional navigation system. Speakers: Premium audio system with subwoofer (optional/standard on certain trims). Driver Assistance Cruise Control: Standard Stability Control: Subaru Vehicle Dynamics Control (VDC) with Sport Mode Connectivity Auxiliary Input: Standard auxiliary audio input jack. Performance Tech Dccd: Driver Controlled Centre Differential for adjustable torque split. Si-Drive: Subaru Intelligent Drive (SI-DRIVE) with Intelligent, Sport, and Sport Sharp modes (controls engine mapping and throttle response). 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 6 months (severe driving), 7,500 miles or 12 months (normal driving) - Consult manual for specific recommendations. Air Filter Replacement: Every 15,000 miles or 12 months (inspect more frequently). Spark Plug Replacement: Every 30,000 miles (NGK Iridium plugs recommended) Fluid Specifications Engine Oil Type: 5W-30 Synthetic (API SN/SP, ILSAC GF-5/GF-6A) - Check manual for specific viscosity and API rating. Coolant Type: Subaru Super Coolant (Blue) - mixture 50/50 with distilled water. Brake Fluid Type: DOT 3 or DOT 4 High-Temperature Brake Fluid Known Issues Engine Internal: Ringland failure (especially with aggressive tuning), valve seal wear, oil consumption. Turbocharger: Wastegate rattle, bearing wear. Clutch: Wear and tear, especially in high-performance driving. Suspension: Worn bushings, premature...