🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STi Generation: Third Generation (GE/GH/GR/GV) Codes Chassis Codes: GR (Hatchback), GV (Sedan) Engine Codes: EJ257 👋 Introduction Market Position Vehicle Segment: Performance Compact Sedan/Hatchback Competitors: Mitsubishi Lancer Evolution, Subaru WRX (non-STi), Volkswagen Golf GTI, Ford Focus RS. Key Features Vehicle Philosophy: Rally-bred performance, Symmetrical All-Wheel Drive, turbocharged boxer engine, driver-focused. Manual Value Proposition: Enables DIY repairs and maintenance for enthusiasts, crucial for preserving the performance and longevity of a high-performance vehicle. 📋 Manual Details Coverage Areas Regions: Global (specific to WRX STi variants) Model Years Covered: 2008, 2009, 2010, 2011 Trim Levels Covered: All WRX STi models Page Count Estimated Page Count: Over 3000 (typical for comprehensive workshop manuals) Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: Digital (PDF/Printable) 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, fuel system, ignition system, exhaust system, engine management, transmission (manual and automatic), drivetrain (AWD system, differentials). Chassis: Suspension (front and rear), steering, braking system (including ABS), wheels, tires. Electrical: Power distribution, lighting, instruments, audio system, climate control, security system, diagnostic connectors, engine control module (ECM) wiring, body control module (BCM) wiring. Body: Exterior body panels, interior trim, doors, windows, seats, glass, bumpers, paint and corrosion protection. Procedures Included Maintenance: Scheduled maintenance, fluid changes, filter replacements, lubrication, inspections. Repair: Engine rebuilds, transmission overhauls, suspension component replacement, brake caliper rebuilding, electrical component diagnosis and repair, body panel repair. Diagnostics: Troubleshooting guides, symptom-based diagnostics, diagnostic trouble codes (DTCs), wiring diagrams for fault finding. Specifications And Measurements: Torque specifications for all fasteners, engine clearances, suspension geometry, diagnostic tool usage. Technical Depth Depth: Comprehensive: Covers routine maintenance to complete engine and transmission rebuilds, including advanced electrical diagnostics and bodywork procedures. Detail Level: Detailed step-by-step instructions with clear visuals. 📊 Manual Specifications File Format Digital Format: PDF Print Quality Printability: High-resolution, fully printable pages. Binding Type Physical Manual Binding: N/A (Digital Product) Paper Type Physical Manual Paper: N/A (Digital Product) Searchability Text Search: Searchable text for quick information retrieval. ⚙️ Engine Specifications Primary Engine Engine Type: Horizontally-opposed turbocharged gasoline engine (Boxer) Displacement: 2.5 Liters (2457 cc) Bore X Stroke: 99.5 mm x 79.0 mm Compression Ratio: 8.4:1 Valvetrain: DOHC, 4 valves per cylinder, AVCS (Active Valve Control System) Performance Horsepower Hp: Approx. 305-310 hp (varies slightly by year and market) Torque Lb-Ft: Approx. 290-297 lb-ft (varies slightly by year and market) Fuel System Fuel Delivery: Multi-point fuel injection (MPI) Recommended Fuel: Premium Unleaded (91 Octane or higher) Turbocharger Turbo Model: IHI VF48 (or similar) Intercooler: Top-mounted air-to-air intercooler 🔧 Transmission Standard Type: 6-speed manual transmission (TY856W1JA or similar) Optional Type: None for STi models in this generation Features AWD System: Subaru Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) Differentials: Front Helical Limited-Slip Differential (LSD), Rear Mechanical Limited-Slip Differential (LSD). 📐 Dimensions Exterior Length Sedan: Approx. 4,415 mm (173.8 in) Length Hatchback: Approx. 4,445 mm (175.0 in) Width: Approx. 1,795 mm (70.7 in) Height Sedan: Approx. 1,475 mm (58.1 in) Height Hatchback: Approx. 1,465 mm (57.7 in) Wheelbase: Approx. 2,650 mm (104.3 in) Weights Curb Weight: Approx. 1,500 - 1,550 kg (3,300 - 3,420 lbs) 🛡️ Safety Features Ratings NHTSA Overall: 4-Star (for 2009 Sedan, varies by year/test protocol) IIHS Front Crash: Good (for applicable tests) Active Features Brake System: 4-wheel anti-lock disc brakes with EBD (Electronic Brake-force Distribution) and Brake Assist. Brembo brakes (front and rear) standard on STi. Traction Control: Subaru Vehicle Dynamics Control (VDC) with traction control and stability control. Passive Features Airbags: Front dual-stage airbags, front side-impact airbags, side-curtain airbags (all models). Seatbelts: 3-point front and rear seatbelts with pretensioners and force limiters. 💡 Technology Features Infotainment Audio System: Standard AM/FM/CD/MP3 player with auxiliary input. Optional premium audio systems available. Navigation: Optional GPS navigation system available on higher trims. Driver Assistance Cruise Control: Standard cruise control. Keyless Entry: Standard keyless entry, optional proximity key and push-button start on later models. Connectivity Bluetooth: Optional Bluetooth hands-free connectivity. 🔧 Maintenance Service Intervals Oil Change: Every 3,750 miles or 6 months, whichever comes first (severe driving conditions). Spark Plugs: Approx. 60,000 miles (Iridium type) Timing Belt: N/A (This generation uses a timing chain) Fluid Specifications Engine Oil: SAE 0W-30, API SG or higher, meeting Subaru specifications (e.g., Subaru Extra S or equivalent). Coolant: Subaru Super Coolant (Blue) or equivalent (50/50 mix with distilled water). Transmission Fluid: Subaru Extra-S Manual Transmission Oil API GL-5, SAE 75W-90. Differential Fluid Front: API GL-5, SAE 75W-90. Differential Fluid Rear: API GL-5, SAE 75W-90. (Some models may require limited-slip additive). Known Issues Engine: Piston ring land failure (ringland failure), head gasket leaks (though less common than earlier generations), turbocharger issues, oil consumption. Suspension: Uneven tire wear due to AWD and performance setup, potential premature wear of bushings and ball joints. Drivetrain: Clutch wear, differential issues under extreme use. 📚...