🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2006 Chassis Code: GDB Generation Generation Name: Third Generation (GD/GG chassis, final iteration) Generation Code: GD (Sedan) Codes Engine Code Primary: EJ257 👋 Introduction Market Position Model Segment: Performance Compact Sedan / Rally Homologation Special Target Audience: Enthusiasts, performance drivers, rally fans, mechanics specializing in Subaru vehicles Competitive Analysis Key Competitors: Mitsubishi Lancer Evolution, Ford Focus RS, Volkswagen Golf GTI/R32 Key Features Distinctive Technologies: Symmetrical All-Wheel Drive (AWD), Subaru Boxer Engine, Driver Controlled Center Differential (DCCD), performance tuning Performance Orientation: Focus on handling, acceleration, and track/rally capability 📋 Manual Details Coverage Areas Coverage Type: Complete Official Service and Repair Manual Included Engines: All Engine Variants (explicitly mentions EJ257) Included Transmissions: Manual Transmissions (all WRX STI variants) Trim Levels Covered: All WRX STI Trim Levels Page Count Estimated Page Count: ~2000+ Manual Type Manual Type: Factory Service Manual (FSM) Language Language: English Format Digital Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul, component testing, timing belt/chain, pistons, rings, bearings, cylinder heads, valve train, lubrication system, cooling system Engine Performance: Fuel injection, ignition system, turbocharger, intercooler, exhaust system, emissions control Transmission: Manual gearbox overhaul, clutch system, driveshafts, differentials (center, front, rear) Brakes: Hydraulic system, ABS, rotor and pad replacement, caliper overhaul, brake lines Suspension: Front and rear suspension components, struts, springs, bushings, alignment specifications Steering: Power steering system, steering rack, tie rods, wheel alignment Electrical System: Battery, charging system, starter, lighting, fuses, relays, wiring diagrams, diagnostic trouble codes (DTCs) Climate Control: HVAC system, A/C service, heater core, blower motor Body And Interior: Body panel removal and installation, door mechanisms, interior trim, seat removal Safety Systems: Airbag system, seatbelt mechanisms Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection/replacement Troubleshooting: Diagnostic procedures, symptom-based troubleshooting, fault code diagnosis Repair And Rebuild: Complete engine rebuild, transmission overhaul, suspension component replacement, brake system repair Diagnostics: OBD-II diagnostics, sensor testing, actuator testing, ECU functionality Wiring Diagrams: Comprehensive electrical schematics for all systems Specifications And Tolerances: Torque values, clearances, fluid capacities, performance specs Technical Depth Depth Of Coverage: Factory-level repair and diagnostic procedures, suitable for professional technicians and advanced DIYers Diagnostic Tools Required: Mention of Subaru Select Monitor (SSM) or equivalent diagnostic tools for advanced diagnostics 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable (standard for official PDFs) Print Quality Image Resolution: High resolution, suitable for printing diagrams and illustrations Binding Type Binding: N/A (Digital PDF) Paper Type Paper Quality: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Family: EJ Series Boxer Engine Code: EJ257 Engine Type: 2.5L Flat-4 Turbocharged DOHC 16-Valve Bore X Stroke: 99.5 mm x 79.0 mm Compression Ratio: 8.2:1 Displacement Cc: 2457 Performance Horsepower Ps: 280 PS @ 5600 rpm (approx. European Spec) Horsepower Hp: 276 hp @ 5600 rpm (approx. US Spec) Torque Nm: 392 Nm @ 3600 rpm (approx. European Spec) Torque Lb-Ft: 290 lb-ft @ 3600 rpm (approx. US Spec) Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) Turbocharger: IHI VF37 (or similar twin-scroll) Intercooler Type: Air-to-Air Top-Mount Intercooler Fuel Type: Unleaded Gasoline (95 RON / 91 Octane minimum recommended) 🔧 Transmission Standard Transmission Type: 6-Speed Manual (TY856WR1AA) Optional Optional Transmission: None for WRX STI trim Features Dccd: Driver Controlled Center Differential (Manual adjustment) Differentials: Front Helical LSD, Rear Viscous LSD 📐 Dimensions Exterior Wheelbase Mm: 2625 Length Mm: 4485 Width Mm: 1795 Height Mm: 1410 Ground Clearance Mm: 135 Wheel Bolt Pattern: 5x114.3 Standard Wheel Size: 18x8.5 Standard Tire Size: 225/40R18 Weights Curb Weight Kg: 1470 Gross Vehicle Weight Rating Kg: 1890 Towing Capacity Kg: Not Recommended 🛡️ Safety Features Ratings NHTSA Frontal Impact Driver: 5-Star (2006 Model Year Rating) NHTSA Frontal Impact Passenger: 5-Star (2006 Model Year Rating) NHTSA Side Impact Front Driver: 5-Star (2006 Model Year Rating) NHTSA Side Impact Front Passenger: 5-Star (2006 Model Year Rating) NHTSA Side Impact Rear Driver: 4-Star (2006 Model Year Rating) NHTSA Side Impact Rear Passenger: 4-Star (2006 Model Year Rating) NHTSA Rollover: 4-Star (2006 Model Year Rating) Active Features ABS: Standard (4-wheel disc brakes with ABS) Traction Control: Standard (SI-DRIVE and AWD system contribute) Electronic Stability Control: Standard (Vehicle Dynamics Control - VDC) Passive Features Airbags: Front airbags, Side curtain airbags, Front side airbags Seatbelts: Front and rear three-point seatbelts, Pre-tensioners, Force limiters 💡 Technology Features Infotainment Head Unit Features: Factory single-DIN or double-DIN CD/Radio with optional premium sound system. Limited advanced features by modern standards. Driver Assistance Active Safety Systems: ABS, VDC (Vehicle Dynamics Control), DCCD (Driver Controlled Center Differential) Performance Modes: SI-DRIVE (Subaru Intelligent Drive) potentially included on some models, offering distinct engine/transmission mapping modes. Connectivity Connectivity Features: Basic (CD player, potentially auxiliary input on some later units). No Bluetooth or USB as standard. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-5,000...