🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI RS Year: 2005 Generation Chassis Code: GD/GG Codes Subaru Internal Model Code: GDB (STI), GDA (WRX) 👋 Introduction Market Position Segment: Performance Compact Sedan/Wagon Target Audience: Enthusiasts, Performance Drivers, DIY Mechanics Competitive Analysis Key Rivals 2005: Mitsubishi Lancer Evolution VIII/IX, Subaru WRX (non-STI), Mitsubishi Eclipse GT, Volkswagen GTI, Ford Focus SVT Key Features Vehicle Identity: Symmetrical All-Wheel Drive, Turbocharged Boxer Engine, Rally-Inspired Performance 📋 Manual Details Coverage Areas Included Variants: WRX, WRX STI, WRX STI RS Page Count Estimated Pages: 1000+ Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Format: Digital (likely PDF), Print 📖 Manual Coverage Systems Covered Powertrain: Engine, Drivetrain, Transmission (Manual & Automatic), Clutch, Differentials, AWD System Chassis: Suspension (Front & Rear), Steering, Brakes (ABS, EBD), Wheels, Tires Electrical: ECU, Wiring Diagrams, Lighting, Ignition, Charging System, Audio System, HVAC Controls, SRS Airbag System, Immobilizer Body: Body Panels, Doors, Windows, Seats, Interior Trim, Exterior Trim, HVAC Ducting, Body Sealing Procedures Included Maintenance: Scheduled Maintenance, Oil Changes, Filter Replacements, Spark Plug Replacement, Fluid Checks & Replacements, Belt Inspections & Replacements Repair: Engine Overhaul, Turbocharger Rebuild, Transmission Rebuild, Brake Caliper Replacement, Suspension Component Replacement, Electrical Component Diagnosis & Repair Diagnostics: Troubleshooting Guides, DTC Code Explanations, Circuit Diagnosis, Component Testing Procedures Engine Diagnostics: Detailed steps for diagnosing fuel system issues, ignition system problems, emissions control faults, turbocharger performance, and engine mechanical failures. Transmission Repair: Complete overhaul procedures for both 5-speed and 6-speed manual transmissions, including synchro ring replacement, bearing checks, and gear inspection. Braking System Overhaul: Detailed instructions for brake pad replacement, rotor resurfacing/replacement, caliper servicing, ABS module diagnosis, and brake fluid bleeding procedures. Technical Depth Depth: Comprehensive Engine Rebuilds, Detailed Electrical Schematics, Component-Level Diagnostics, Torque Specifications for all Fasteners, Special Tool Requirements Torque Specifications: Exhaustive torque values for all critical fasteners, from cylinder head bolts to wheel nuts, ensuring proper assembly and preventing component failure. Wiring Diagrams: Full color, detailed wiring schematics for all electrical systems, including engine control, lighting, power windows, SRS, and entertainment systems. 📊 Manual Specifications File Format PDF Quality: High-Resolution Scans, Searchable Text (OCR) Print Quality Print Format: Professionally Bound, Easy-to-Read Layout Binding Type Binding: Coil-bound or Perfect Bound (typical for large manuals) Paper Type Paper Quality: Durable, High-Quality Paper (resistant to shop grease) ⚙️ Engine Specifications Primary Engine Engine Code Sti: EJ257 Engine Code Wrx: EJ255 Engine Type: 2.5L DOHC Turbocharged Boxer 4-Cylinder Performance Horsepower Sti: 300 hp @ 6000 rpm Torque Sti: 300 lb-ft @ 4000 rpm Horsepower Wrx: 227 hp @ 5600 rpm Torque Wrx: 247 lb-ft @ 3600 rpm Fuel System Fuel Injection: Multi-Point Fuel Injection (MPI), Sequential Electronic Fuel Injection (SEFI) Fuel Type: Premium Unleaded (91+ Octane Recommended) Engine Management ECU Type: Denso ECU (e.g., Denso 22611AG821 for STI) 🔧 Transmission Standard Transmission Type Sti: 6-Speed Manual Transmission Type Wrx: 5-Speed Manual Optional Optional Transmission: None (Manual transmission was standard for WRX/STI models in this generation) Features AWD System: Subaru Symmetrical All-Wheel Drive with Driver-Controlled Center Differential (DCCD) on STI Fluid Specs Manual Transmission Fluid: Subaru Extra S / API GL-4 / GL-5 Gear Oil (e.g., Subaru 003113410 for STI 6MT, 003113150 for WRX 5MT) Rear Differential Fluid: API GL-5 Gear Oil (75W-90 Recommended) 📐 Dimensions Exterior Length: Approx. 173.8 inches (4415 mm) Width: Approx. 69.7 inches (1770 mm) Height: Approx. 57.7 inches (1465 mm) Weights Curb Weight Wrx: Approx. 3150 lbs (1430 kg) Curb Weight Sti: Approx. 3245 lbs (1470 kg) Wheel Specs Wheel Bolt Pattern: 5x100mm Wheel Size Sti: 17x8.0 inches (factory) Wheel Size Wrx: 17x7.0 inches (factory) Tire Size Sti Tire Size: 225/45R17 Tire Size Wrx Tire Size: 215/45R17 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star Driver, 4-Star Passenger IIHS Side Impact: Good Active Features Braking System: 4-Wheel Disc Brakes, ABS, EBD (Electronic Brake-force Distribution) Traction Control: Standard on WRX, optional on STI (early models), advanced AWD system Passive Features Airbags: Front Dual-Stage Airbags, Side Curtain Airbags (optional) Seatbelts: 3-Point Pretensioner Seatbelts with Force Limiters 💡 Technology Features Infotainment Audio System: Factory AM/FM/CD Player with 6 Speakers (optional Rockford Fosgate premium system) Navigation: Optional Factory GPS Navigation System (rare) Driver Assistance Cruise Control: Standard Connectivity Auxiliary Input: No factory standard aux input; aftermarket solutions common. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles (6,000 km) or 6 months (severe driving) / 7,500 miles (12,000 km) or 12 months (normal driving) Timing Belt Replacement: Every 105,000 miles (168,000 km) or 7 years (whichever comes first) - Critical for EJ engines Spark Plug Replacement: Approx. 30,000 miles (48,000 km) for iridium plugs Fluid Specifications Engine Oil Spec: API SG, SH, SJ, SL, SM or ILSAC GF-2, GF-3, GF-4; Viscosity: 5W-30 recommended Coolant Type: Subaru Super Coolant / Long Life Coolant (Blue) Known Issues Head Gaskets: While less common on the 2.5L engines...