🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2008 Manual Product Name: SUBARU IMPREZA WRX STI Full Service & Repair Manual 2008 Codes Chassis Code Series: GR/GV (Hatchback/Sedan) 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback Target Audience: Enthusiast drivers, performance tuning community, DIY mechanics, professional workshops. Competitive Analysis Key Competitors 2008: Mitsubishi Lancer Evolution, Subaru WRX (non-STI), Volkswagen GTI, Mazdaspeed3. Key Features Performance Focus: Subaru's iconic Symmetrical All-Wheel Drive system and turbocharged boxer engine define its performance pedigree. Rally Heritage: Directly benefits from Subaru's extensive World Rally Championship (WRC) heritage, translating into robust engineering for demanding use. Driver Engagement: Focus on driver feedback, precise handling, and a powerful, responsive powertrain. 📋 Manual Details Coverage Areas Primary Coverage: North America, Europe, Australia Engine Variants Covered: 2.5L Turbocharged EJ257 Transmission Variants Covered: 6-Speed Manual Transmission Page Count Estimated Pages: Approximately 2500-3000 (typical for full factory manuals) Manual Type Type: Factory Service Manual / Workshop Manual Language Language: English Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete engine overhaul, cylinder head, block, pistons, crankshaft, camshafts, timing belt/chain, lubrication system, cooling system. Engine Performance Tuning: Turbocharger system, intercooler, ECU (Engine Control Unit) diagnostics and parameters, fuel injection, ignition system. Transmission: 6-speed manual gearbox, clutch system, drivetrain components (driveshafts, differentials). Suspension Steering: Front and rear suspension (McPherson struts, multi-link), sway bars, bushings, power steering system, alignment specifications. Brakes: Front and rear brake systems (including Brembo calipers on STI models), ABS (Anti-lock Braking System), EBD (Electronic Brakeforce Distribution), parking brake. Electrical Electronics: Complete wiring diagrams, ECU pinouts, sensors, actuators, starter, alternator, battery, lighting systems, audio system, power accessories. Body Chassis: Body panel removal and installation, structural components, interior trim, glass, doors, hood, trunk lid, chassis lubrication. HVAC: Heating, Ventilation, and Air Conditioning system diagnosis and repair. Fuel System: Fuel tank, fuel pump, fuel lines, injectors, fuel pressure regulator. Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, brake pad replacement. Diagnostics: Troubleshooting guides for common symptoms, fault code interpretation (OBD-II), diagnostic connector locations. Repair Rebuild: Detailed step-by-step instructions for engine rebuilds, transmission overhaul, suspension component replacement, brake caliper rebuild. Electrical Diagnostics: Component testing, circuit tracing, use of multimeters and oscilloscopes, ABS/VDC system diagnostics. Bodywork Repair: Panel replacement, welding procedures (if applicable for chassis), bumper repair, glass replacement. Tire Wheel Service: Tire mounting and balancing, wheel torque specifications, alignment procedures. Technical Depth Depth: Comprehensive, from basic maintenance to full engine and transmission rebuilds, including advanced diagnostics. Detail Level: Factory-level detail with torque specifications, clearances, assembly sequences, and electrical schematics. 📊 Manual Specifications File Format Format: PDF Searchability: Searchable text content for quick information retrieval. Printability: Printable pages for workshop use. Print Quality Quality: High-resolution images and diagrams. Binding Type Type: N/A (Digital Format) Paper Type Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Code: EJ257 Configuration: Horizontally-opposed (Boxer), 4-Cylinder Displacement: 2.5 Liters (2457 cc) Aspiration: Turbocharged and Intercooled Performance Horsepower Hp: 305 hp @ 6000 RPM (approx.) Torque Lb Ft: 290 lb-ft @ 4000 RPM (approx.) Fuel System Induction: Multi-Point Fuel Injection (MPI) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Engine Management ECU: Engine Control Unit (ECU) - Specific model varies by market, but generally programmable for tuning. 🔧 Transmission Standard Type: 6-Speed Manual Transmission Drivetrain: Symmetrical All-Wheel Drive (AWD) with Driver-Controlled Center Differential (DCCD) Optional Type: None for WRX STI models in 2008 Features Clutch: Hydraulic, multi-plate type (often upgraded from standard WRX). Dccd Modes: Automatic and Manual modes for center differential lock-up bias control. 📐 Dimensions Exterior Length In: 179.7 (Sedan), 173.8 (Hatchback) Width In: 70.7 Height In: 58.1 (Sedan), 58.3 (Hatchback) Wheelbase In: 103.0 Weights Curb Weight Lbs: 3296 (Sedan), 3373 (Hatchback) Gross Vehicle Weight Rating Lb: 4500 Cargo Trunk Volume Cu Ft: 11.7 (Sedan) 🛡️ Safety Features Ratings NHTSA Frontal Crash: 5-Star Driver, 4-Star Passenger (for comparable Impreza models of that era, STI specific data may vary slightly) IIHS Frontal Offset: Good (for comparable Impreza models of that era) Active Features ABS: Standard Anti-lock Braking System Ebd: Standard Electronic Brakeforce Distribution Traction Control: Standard Traction Control System (TCS) Stability Control: Standard Vehicle Dynamics Control (VDC) Passive Features Airbags: Front dual-stage airbags, front side-impact airbags, front and rear side-curtain airbags. Seatbelts: 3-point height-adjustable front seatbelts with pretensioners and force limiters, rear 3-point seatbelts. Child Anchors: LATCH (Lower Anchors and Tethers for Children) system. 💡 Technology Features Infotainment Head Unit: Standard AM/FM/CD stereo system with available options for satellite radio and auxiliary input (model dependent). Driver Assistance AWD System: Subaru's Symmetrical All-Wheel Drive with Driver-Controlled Center Differential (DCCD) for optimal traction and handling control. Connectivity Auxiliary Input: Available auxiliary audio input jack. 🔧 Maintenance Service Intervals Oil Change Miles: Every 3,750 miles or 6 months (severe duty/enthusiast driving), 7,500 miles or 12 months (normal driving)....