🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Model Variant: Turbo & Non-Turbo Year: 2005 Codes Chassis Code Sti: GDB Chassis Code Wrx: GDA 👋 Introduction Market Position Segment: Performance Compact / Rally Homologation Special Reputation: Renowned for its rallying heritage, potent turbocharged engine, and advanced All-Wheel Drive system Competitive Analysis Key Competitors 2005: Mitsubishi Lancer Evolution, Subaru WRX (non-STI), Ford Focus RS, Honda Civic Type R (in some markets) Key Features Drivetrain: Symmetrical All-Wheel Drive (AWD) with Driver Controlled Center Differential (DCCD) on STI models Engine Sti: EJ257 turbocharged Boxer engine (2.5L) Engine Wrx: EJ205 turbocharged Boxer engine (2.0L) or EJ253 naturally aspirated Boxer engine (2.5L) depending on market Performance Focus: Emphasis on handling, grip, and driver engagement Body Style: Available as a 4-door sedan and 5-door wagon 📋 Manual Details Coverage Areas Coverage Scope: Comprehensive factory service and repair Specific Models Covered: All 2005 Subaru Impreza WRX STI and WRX variants (Turbo and Non-Turbo) Page Count Estimated Pages: 1500+ Manual Type Type: Factory Service Manual / Workshop Manual Language Language: English Format Digital Format: PDF (Instant Download) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul, disassembly, assembly, inspection, and repair of all engine components (EJ20/EJ25 series) Engine Management: Fuel injection, ignition system, emissions control, ECU diagnostics, sensor testing Transmission Manual: Disassembly, inspection, repair, and adjustment of 5-speed and 6-speed transmissions (TY757/TY856) Transmission Automatic: If applicable to 2005 WRX/STI models, coverage of automatic transmission service Drivetrain AWD: All-Wheel Drive system, center differential, rear differential service and repair Suspension: Front and rear suspension components, alignment procedures, shock absorber/strut replacement, bush inspection Steering: Power steering system, steering rack, tie rods, alignment Brakes: Front and rear brake systems, ABS, EBD, parking brake, hydraulic system service Electrical System: Wiring diagrams, component testing, charging system, starting system, lighting, power accessories Body And Trim: Exterior and interior trim removal/installation, body panel repair, glass replacement Heating Ventilation Air Conditioning: HVAC system diagnosis and repair, refrigerant handling Safety Systems: Airbag system diagnosis and servicing Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug service, fluid checks and replacements, belt inspection Diagnostic Troubleshooting: System-by-system troubleshooting guides, fault code interpretation, symptom-based diagnostics Component Replacement: Step-by-step instructions for replacing virtually all serviceable parts Engine Rebuild: Detailed procedures for complete engine disassembly, cleaning, inspection, and reassembly Transmission Overhaul: In-depth guidance for complete transmission disassembly and rebuilding Suspension Geometry: Wheel alignment specifications and procedures Electrical Diagnostics: Testing procedures for all electrical components, including wiring harnesses and connectors Torque Specifications: Comprehensive list of all critical torque values for fasteners across all systems Special Tools: Identification and usage instructions for Subaru-specific special tools required for certain repairs Technical Depth Depth: Factory-level diagnostic and repair procedures Detail Level: Includes detailed diagrams, schematics, and exploded views Target Audience: Professional technicians and advanced DIY enthusiasts 📊 Manual Specifications File Format Format: Digital PDF Searchability: Searchable text for quick information retrieval Printability: Printable pages Print Quality Image Resolution: High-resolution diagrams and illustrations Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Sti Engine Code: EJ257 Sti Engine Type: 2.5L DOHC turbocharged Boxer 4-cylinder Wrx Engine Code: EJ205 (Turbo) or EJ253 (NA) Wrx Engine Type: 2.0L DOHC turbocharged Boxer 4-cylinder (EJ205) or 2.5L SOHC naturally aspirated Boxer 4-cylinder (EJ253) Performance Sti Horsepower Net: 300 hp @ 6000 rpm (JDM/UKDM), 300 hp @ 6000 rpm (USDM) Sti Torque Net: 290 lb-ft @ 4000 rpm (JDM/UKDM), 290 lb-ft @ 4000 rpm (USDM) Wrx Horsepower Net: 227 hp @ 5600 rpm (Turbo USDM), 165 hp @ 5600 rpm (NA USDM) Wrx Torque Net: 217 lb-ft @ 3600 rpm (Turbo USDM), 170 lb-ft @ 4000 rpm (NA USDM) Fuel System Fuel Injection: Multi-point fuel injection (MPI) with Electronic Throttle Control (ETC) Turbocharger: IHI VF39 (STI) or TD04L-13T (WRX) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended for STI) Engine Internals Sti Pistons: Forged pistons Sti Connecting Rods: H-beam connecting rods Sti Crankshaft: Nitrided crankshaft Sti Cylinder Head: Dual Overhead Camshafts (DOHC) with 4 valves per cylinder 🔧 Transmission Standard Sti Transmission Type: 6-speed manual (TY856) Wrx Transmission Type: 5-speed manual (TY757) Optional Automatic Transmission: Not typically offered on STI, may be available on some WRX variants in specific markets Features Sti AWD System: Symmetrical AWD with Driver Controlled Center Differential (DCCD) Wrx AWD System: Viscous coupling center differential Fluid Specifications Manual Transmission Fluid: Subaru Extra-S Gear Oil (or equivalent API GL-5 75W-90) Rear Differential Fluid: Subaru Extra-S Gear Oil (or equivalent API GL-5 75W-90) Gear Ratios Sti Final Drive Ratio: 3.545 📐 Dimensions Exterior Length: 4,485 mm (176.6 in) for Sedan Width: 1,740 mm (68.5 in) Height: 1,410 mm (55.5 in) for Sedan Wheelbase: 2,625 mm (103.3 in) Weights Sti Curb Weight: Approx. 1,430 kg (3,153 lbs) Wrx Curb Weight: Approx. 1,360 kg (2,998 lbs) Gvw: Varies by model...