🏷️ Basic Information Identification Make: Subaru Model: Impreza STi Model Year: 2006, 2007 Trim Levels Covered: Standard, Turbo (WRX STi) 👋 Introduction Market Position Segment: Compact Sport Sedan/Wagon (Performance Variant) Target Audience: Enthusiasts, performance drivers, owners seeking to perform their own maintenance and repairs Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Subaru WRX (non-STi variants), Volkswagen Golf GTI, Ford Focus RS Key Features Performance Focus: Rally-inspired performance, turbocharged engine, advanced AWD system Handling: Renowned for its sharp handling and driver feedback All Wheel Drive: Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) for variable torque distribution 📋 Manual Details Coverage Areas Covered Regions: Global (with model year specific variations) Page Count Estimated Page Count: 1500+ pages (typical for complete workshop manuals of this era) Manual Type Type: Complete Workshop Service Repair Manual Language Language: English Format Format: Downloadable (likely PDF) 📖 Manual Coverage Systems Covered Engine: EJ257 (2.5L Turbocharged Boxer), EJ255 (2.5L Turbocharged Boxer - potential regional variations) Transmission: 6-speed Manual (TY856) Drivetrain: All-Wheel Drive (Symmetrical AWD with DCCD - Driver Controlled Center Differential) Suspension: Front: MacPherson Strut with Lower Control Arm, Rear: Multi-Link Brakes: Front: Brembo 4-piston calipers, Rear: Brembo 2-piston calipers (ventilated discs front and rear) Steering: Power Assisted Rack and Pinion Electrical: Complete wiring diagrams, ECU functions, sensors, actuators, lighting, comfort systems Body And Chassis: Body panel repair, structural components, interior trim, glass, doors, aerodynamics HVAC: Heating, Ventilation, and Air Conditioning system Fuel System: Fuel injection, fuel pump, injectors, fuel pressure regulation Cooling System: Radiator, fans, thermostat, coolant passages Exhaust System: Catalytic converter, mufflers, exhaust manifold Procedures Included Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspections Troubleshooting: Diagnostic trouble codes (DTCs), symptom-based diagnostics, electrical gremlins Repair: Engine rebuilds, transmission overhaul, brake caliper replacement, suspension component renewal, bodywork repairs Diagnostics: OBD-II diagnostics, sensor testing, actuator testing, ECU diagnostics Special Tools: Identification and usage of specialized tools required for specific repairs Torqu Specifications: Precise torque values for all critical fasteners Alignment: Wheel alignment procedures and specifications Electrical Diagnostics: Step-by-step testing of circuits, components, and wiring harnesses Technical Depth Depth: Comprehensive: Covers everything from routine maintenance and minor repairs to major overhauls and diagnostics Diagnostic Capability: Advanced: Includes detailed troubleshooting flowcharts, wiring diagrams, and component testing procedures Rebuild Procedures: Complete: Detailed instructions for engine, transmission, and differential rebuilds 📊 Manual Specifications File Format Digital Format: PDF (Portable Document Format) Print Quality Resolution: High-resolution, suitable for printing individual pages or the entire manual Binding Type Binding: Not applicable for downloadable format; if printed, typically comb-bound or perfect-bound Paper Type Paper: Not applicable for downloadable format; if printed, typically on durable, high-quality paper Searchability Text Search: Searchable PDF text for quick access to specific information ⚙️ Engine Specifications Primary Engine Engine Code: EJ257 Engine Type: Horizontally-Opposed (Boxer) Turbocharged DOHC 16-valve Displacement: 2.5 Liters (2457 cc) Performance Horsepower: 300-320 hp @ 6400 rpm (varies by region and specific tune) Torque: 290-300 lb-ft @ 4000 rpm (varies by region and specific tune) Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI), Sequential Electronic Fuel Injection (SEFI) Fuel Type: Premium Unleaded Gasoline (91 Octane or higher recommended) Ignition System Ignition Type: Electronic Ignition (Distributorless Ignition System - DIS) Turbocharger Turbo Model: IHI VF39 (common, may vary) Intercooler Intercooler Type: Top-mounted Air-to-Air Intercooler 🔧 Transmission Standard Type: 6-Speed Manual Transmission Transmission Model: TY856 Features Clutch Type: Hydraulically Actuated Single Plate Dry Clutch Gear Ratios: Specific ratios detailed within manual (crucial for performance tuning and repair) Fluid Specifications Transmission Fluid: Subaru Extra-S Gear Oil (75W-90 GL-5) or equivalent recommended 📐 Dimensions Exterior Length: Approx. 174.5 inches (4430 mm) Width: Approx. 70.1 inches (1780 mm) Height: Approx. 57.7 inches (1465 mm) Wheelbase: Approx. 104.0 inches (2642 mm) Weights Curb Weight: Approx. 3300-3400 lbs (1497-1542 kg) depending on body style (sedan/wagon) Gross Vehicle Weight Rating: Specified by manufacturer, typically around 4300 lbs Cargo Trunk Volume: Approx. 11.3 cu ft (Sedan), 19.6 cu ft (Wagon rear seats up) 🛡️ Safety Features Ratings NHTSA Front Impact: 5-star (for applicable models/years) IIHS Side Impact: Good (for applicable models/years) Active Features ABS: Standard Anti-lock Braking System Traction Control: Standard Traction Control System (TCS) Electronic Stability Control: Standard Electronic Stability Control (VDC - Vehicle Dynamics Control) Passive Features Airbags: Front airbags, front side-impact airbags, side curtain airbags (standard on many trims) Seatbelts: 3-point front and rear seatbelts with pretensioners and force limiters Child Anchors: LATCH (Lower Anchors and Tethers for Children) system 💡 Technology Features Infotainment Head Unit: Aftermarket or factory radio with CD player, AM/FM tuner. Higher trims may feature 6-disc CD changer. Speakers: Typically 6-speaker system, some models may have premium audio option. Driver Assistance Cruise Control: Standard cruise control Keyless Entry: Optional keyless entry system Connectivity Usb Aux: Not standard; requires aftermarket integration. Instrumentation Gauge Cluster: Sport-oriented with prominent tachometer and speedometer, multi-function display. 🔧 Maintenance...