🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Model Generation: Third Generation (GR/GV) Model Code: GR/GV Series Production Years Covered: 2008, 2009, 2010, 2011 👋 Introduction Market Position Vehicle Segment: Performance Compact Sedan/Hatchback (All-Wheel Drive) Competitors: Mitsubishi Lancer Evolution, Subaru WRX (non-STI variants), Mitsubishi Eclipse GT, Nissan Sentra SE-R, Volkswagen GTI Competitive Analysis Key Selling Points: Symmetrical All-Wheel Drive, turbocharged boxer engine, rally-bred heritage, performance tuning potential, driver-focused chassis dynamics Key Features Manual Value Proposition: Provides factory-level diagnostic and repair information, empowering owners and technicians to maintain and restore the vehicle to original specifications. Offers comprehensive coverage not found in generic repair guides. Manual Uniqueness: Factory-sourced data ensures accuracy and completeness for specialized performance systems unique to the WRX STI model. 📋 Manual Details Coverage Areas Manual Type: Factory Service Manual / Workshop Manual / Repair Manual Language: English Format: Digital Download (likely PDF) Digital Rights: No expiry dates, no additional fees 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, engine management, fuel system, exhaust system, cooling system, lubrication system, transmission (manual & automatic), drivetrain (AWD system) Chassis: Suspension (front & rear), steering system, braking system (ABS, EBD), wheel alignment Electrical: Wiring diagrams, charging system, starting system, lighting system, instruments and indicators, body electrical, power accessories, audio system, safety systems (airbags, immobilizer) Body And Trim: Exterior body panels, interior trim, doors, windows, seats, HVAC system (climate control) Diagnostics And Troubleshooting: Diagnostic trouble codes (DTCs), symptom-based troubleshooting, component testing, electrical diagnostics Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, belt and hose inspection/replacement Repair: Engine rebuild procedures, transmission overhaul, brake caliper replacement, suspension component replacement, electrical component repair/replacement, body panel repair Diagnostics: Fault finding, system checks, measurement of electrical signals, pressure testing Adjustment And Calibration: Wheel alignment, throttle body cleaning/calibration, idle speed adjustment (where applicable) Technical Depth Depth Of Coverage: Comprehensive: covers basic maintenance to complete engine and transmission rebuilds, detailed diagnostic procedures, and electrical system troubleshooting. Target Audience: Professional technicians, experienced DIY enthusiasts 📊 Manual Specifications File Format File Type: PDF Searchability: Text-searchable (assumed for professional manuals) Printability: Printable (assumed) Print Quality Image Resolution: High-resolution (expected for technical diagrams and illustrations) Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: EJ257 Engine Type: Horizontally-opposed (Boxer) 4-cylinder, turbocharged and intercooled 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: 305 hp @ 6000 rpm (U.S. Market) Torque: 290 lb-ft @ 4000 rpm (U.S. Market) Fuel System Fuel Type: Premium Unleaded Gasoline (91 AKI or higher recommended) Fuel Delivery: Multi-point Fuel Injection (MPI) Turbocharger: IHI VF48 Twin-Scroll Turbocharger 🔧 Transmission Standard Transmission Type: 6-speed Manual Transmission (TY757) Optional Transmission Type: None for WRX STI in this generation Features Drivetrain: Symmetrical All-Wheel Drive (SAWD) with Driver Controlled Center Differential (DCCD) Differential Type: Front: Helical limited-slip; Rear: Viscous limited-slip Clutch Type: Hydraulically actuated, single dry plate 📐 Dimensions Exterior Length: 179.3 inches (4555 mm) (Hatchback - GR), 179.5 inches (4560 mm) (Sedan - GV) Width: 70.7 inches (1795 mm) Height: 57.9 inches (1470 mm) (Hatchback - GR), 57.1 inches (1450 mm) (Sedan - GV) Wheelbase: 103.0 inches (2615 mm) Front Track: 60.2 inches (1530 mm) Rear Track: 59.8 inches (1520 mm) Weights Curb Weight: Approximately 3375 - 3417 lbs (1530 - 1550 kg) depending on body style Gross Vehicle Weight Rating: 4564 lbs (2070 kg) 🛡️ Safety Features Ratings NHTSA Overall: Not specifically rated for STI, but Impreza models received 5-star ratings in some tests. IIHS Front Crash: Good (for Impreza) Active Features ABS: Anti-lock Braking System with Electronic Brake-force Distribution (EBD) Traction Control: Vehicle Dynamics Control (VDC) AWD System: Driver Controlled Center Differential (DCCD) for active torque distribution Passive Features Airbags: Front airbags, front side-impact airbags, curtain side airbags Seatbelts: 3-point ELR front and rear seatbelts with pre-tensioners and force limiters Child Anchors: LATCH (Lower Anchors and Tethers for CHildren) system 💡 Technology Features Infotainment Head Unit: Standard AM/FM/CD player with auxiliary input, optional navigation system available. Audio System: Optional premium audio system with subwoofer. Driver Assistance Cruise Control: Standard cruise control Keyless Entry: Standard keyless entry with remote locking/unlocking. Connectivity Usb Port: Not standard on all models, some later variants may have auxiliary input. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 3 months (severe driving), 7,500 miles or 6 months (normal driving) - consult manual for specifics. Major Service Intervals: Timing belt replacement (if applicable, consult specific engine variant), spark plug replacement (e.g., 60,000 miles), brake fluid flush (e.g., 30,000 miles or 2 years). Fluid Specifications Engine Oil: SAE 5W-30, API SN or higher, ILSAC GF-5 or higher (synthetic recommended, e.g., Mobil 1 5W-30) Transmission Fluid: Subaru Extra-S Gear Oil...