🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STi Generation: Third Generation (GE/GH/GR/GV) Chassis Codes: GR (Hatchback), GV (Sedan) Production Years Covered: 2008, 2009, 2010, 2011 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback Target Audience: Enthusiasts, performance drivers, DIY mechanics, professional workshops Competitive Analysis Key Rivals: Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Mazdaspeed3 Key Features Vehicle Highlights: Symmetrical All-Wheel Drive, turbocharged Boxer engine, rally-bred performance heritage Manual Value Proposition Value: Enables owners and technicians to maintain and repair the vehicle effectively, reducing labor costs and maximizing performance 📋 Manual Details Coverage Areas Languages: English Regions Covered: Global (primarily North America, Europe, Japan) Page Count Estimated Pages: 3000+ Manual Type Type: Complete Workshop Service and Repair Manual Content Focus: Diagnostic, repair, maintenance, troubleshooting, wiring diagrams, specifications Format Digital Format: Downloadable PDF 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, engine control, fuel system, ignition system, emissions, exhaust system Drivetrain: Transmission (manual & automatic), transfer case, differentials, drive shafts, axles Chassis: Suspension (front & rear), steering system, brakes (hydraulic & parking) Electrical: Body electrical systems, lighting, instrumentation, infotainment, power accessories, wiring diagrams, ECU locations Body: Body panels, interior trim, seats, doors, windows, HVAC system, collision repair Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks, spark plug replacement Repair: Engine overhaul, transmission rebuilds, brake system repairs, suspension component replacement, electrical component diagnosis and replacement Diagnostics: Troubleshooting guides, DTC (Diagnostic Trouble Code) interpretation, sensor testing, circuit analysis Special Procedures: Turbocharger servicing, AWD system calibration, ECU remapping considerations (diagnostic perspective) Technical Depth Depth: Comprehensive from basic checks to full component rebuilds and advanced diagnostics Detail Level: Detailed step-by-step instructions, torque specifications, special tool requirements 📊 Manual Specifications File Format File Type: PDF Searchability: Text-searchable for efficient information retrieval Print Quality Resolution: High-resolution for clear diagrams and text Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: EJ257 Engine Type: 2.5L DOHC turbocharged Boxer 4-cylinder Bore X Stroke: 99.5 mm x 79.0 mm Compression Ratio: 8.4:1 Performance Horsepower: 305 hp @ 6000 rpm (approx.) Torque: 290 lb-ft @ 4000 rpm (approx.) Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) with Electronic Throttle Control (ETC) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Ignition System Ignition Type: Coil-on-plug, Distributorless Ignition System (DIS) Cooling System Coolant Capacity: Approximately 7.4 quarts (7.0 liters) Lubrication System Oil Type And Capacity: 5W-30 Synthetic, 4.8 quarts (4.5 liters) with filter 🔧 Transmission Standard Type: 6-speed Manual Transmission (TY856) Optional Type: None (STi was manual-only in this generation) Features Drive System: Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) Fluid Specifications Manual Transmission Fluid: Subaru Extra-S Gear Oil (API GL-5, SAE 75W-90 recommended) Front Differential Fluid: API GL-5, SAE 75W-90 Rear Differential Fluid: API GL-5, SAE 75W-90 (Limited Slip Differential fluid requirements may apply) 📐 Dimensions Exterior Wheelbase Hatchback: 103.2 inches (2620 mm) Wheelbase Sedan: 103.2 inches (2620 mm) Length Hatchback: 173.4 inches (4405 mm) Length Sedan: 180.1 inches (4575 mm) Width: 70.7 inches (1795 mm) Height Hatchback: 58.1 inches (1475 mm) Height Sedan: 57.7 inches (1465 mm) Wheel Bolt Pattern: 5x100 mm Wheel Size: 18x8.5 inches Weights Curb Weight Hatchback: 3373 lbs (1530 kg) Curb Weight Sedan: 3395 lbs (1540 kg) 🛡️ Safety Features Ratings NHTSA Frontal Crash: 5-Star NHTSA Side Impact: 5-Star IIHS Front Crash Test: Good Active Features Traction Control: Yes (Multi-mode Traction Control System) Electronic Stability Control: Yes (Vehicle Dynamics Control - VDC) ABS: Yes (4-wheel Anti-lock Braking System with Electronic Brake-force Distribution - EBD and Brake Assist) Passive Features Airbags: Driver and front passenger airbags, front side-impact airbags, side-curtain airbags Seatbelts: 3-point front and rear seatbelts with pretensioners and force limiters Body Structure: Reinforced chassis for improved crashworthiness 💡 Technology Features Infotainment Head Unit: Standard CD player with auxiliary input, optional navigation system with touch screen. Audio System: Premium audio options, often from manufacturer or aftermarket brands like Bose. Driver Assistance Cruise Control: Standard electronic cruise control. Keyless Entry Start: Available keyless entry and push-button start on higher trims. Connectivity Bluetooth: Optional Bluetooth hands-free connectivity. Performance Tech Dccd: Driver Controlled Center Differential for on-the-fly adjustment of front/rear torque split. Si Drive: Subaru Intelligent Drive (SI-DRIVE) system allowing driver selection of 'Intelligent', 'Sport', and 'Sport Sharp' modes, influencing throttle response, engine mapping, and VDC. 🔧 Maintenance Service Intervals Oil Change: Every 3,750 miles (6,000 km) or 3 months, whichever comes first (severe driving conditions), or 7,500 miles (12,000 km) / 6 months (normal conditions). Air Filter: Inspect every 7,500 miles (12,000 km), replace as needed. Typically recommended every 15,000-30,000 miles. Spark Plugs: Replace every 30,000 miles (48,000 km) (iridium type). Timing Belt: N/A (Engine uses a timing chain) Coolant Flush: First replacement at 60,000 miles (96,000 km) or 48 months, then every 30,000 miles (48,000 km) or 24 months. Fluid...