🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2005 Codes Chassis Code: GDB Generation Generation Designation: GD 👋 Introduction Market Position Market Segment: Performance Compact / Rally-Inspired Sedan Competitive Analysis Key Competitors: Mitsubishi Lancer Evolution, Ford Focus RS (in some markets), Volkswagen Golf GTI Key Features Performance Focus: Symmetrical All-Wheel Drive, turbocharged Boxer engines, performance-tuned suspension Rally Heritage: Direct lineage from Subaru's World Rally Championship (WRC) successes Driver Engagement: Emphasis on driver feedback, handling dynamics, and responsive powertrain 📋 Manual Details Coverage Areas Trim Levels Covered: RS, WRX STi, WRX Sport, Hatchback Page Count Estimated Page Count: 1000+ Manual Type Manual Type: Factory Service Manual / Repair Manual Language Language: English Format Format: Downloadable Digital File (PDF) 📖 Manual Coverage Systems Covered Powertrain Systems: Engine, Transmission (Manual & Automatic), Drivetrain (AWD System, Differentials), Fuel System, Cooling System, Exhaust System Chassis Systems: Suspension (Front & Rear), Steering System, Braking System (ABS included), Wheels & Tires Electrical Systems: Body Control Modules, Lighting, Instrumentation, Audio System, HVAC Controls, Power Accessories, Engine Control Unit (ECU) and related sensors, SRS Airbag System Body And Interior: Body Panels, Doors, Windows, Seats, Interior Trim, HVAC (Heating, Ventilation, Air Conditioning) Procedures Included Maintenance Procedures: Scheduled Maintenance (oil changes, filter replacements, fluid checks), Brake Service, Suspension Component Replacement, Belt Replacement, Spark Plug Replacement Repair Procedures: Engine Overhaul, Transmission Rebuild, Drivetrain Component Repair, Brake Caliper/Rotor Replacement, Suspension Shock/Strut Replacement, Electrical Component Diagnosis and Repair, Body Panel Repair Troubleshooting: Diagnostic Trouble Codes (DTCs), Symptom-based diagnosis, Electrical circuit tracing, Component testing Technical Depth Depth Of Coverage: Comprehensive (from basic fluid checks to full engine/transmission rebuilds) Diagnostic Information: Detailed diagnostic flowcharts, Wiring diagrams, Sensor specifications, Actuator testing procedures Special Tools: Identification and use of Subaru-specific tools and equipment 📊 Manual Specifications File Format File Format: PDF Print Quality Image Resolution: High-resolution, clear line drawings and photographic images Text Searchability: Searchable PDF text for easy information retrieval Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: EJ257 (for STi), EJ205 (for WRX) Engine Type: DOHC 16-valve turbocharged horizontally-opposed (Boxer) 4-cylinder Displacement: 2.5 Liters (EJ257), 2.0 Liters (EJ205) Performance Horsepower Sti: 300 hp @ 6000 rpm (approximate, US Spec) Torque Sti: 300 lb-ft @ 4000 rpm (approximate, US Spec) Horsepower Wrx: 227 hp @ 6000 rpm (approximate, US Spec) Torque Wrx: 236 lb-ft @ 4000 rpm (approximate, US Spec) Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) with Electronic Throttle Control Fuel Type: Premium Unleaded Gasoline (91 Octane or higher recommended) 🔧 Transmission Standard Standard Transmission Sti: 6-Speed Manual Transmission Optional Optional Transmission Wrx: 4-Speed Automatic Transmission (less common) Features AWD System: Subaru Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) on STi models Differential Types: Front: Helical Limited Slip, Rear: Viscous Limited Slip (STi); Front: Open, Rear: Viscous Limited Slip (WRX) 📐 Dimensions Exterior Wheelbase: 103.1 inches (2619 mm) Length: 173.8 inches (4415 mm) Width: 69.7 inches (1770 mm) Height: 56.1 inches (1425 mm) Weights Curb Weight Sti: 3263 lbs (1480 kg) Curb Weight Wrx: 3109 lbs (1410 kg) Gross Vehicle Weight Rating: 4320 lbs (1960 kg) (approximate) Cargo Trunk Volume: 11.3 cu ft (Sedan) 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star (Driver and Passenger) NHTSA Side Impact: 4-Star (Front), 5-Star (Rear) Active Features ABS: Standard Anti-lock Braking System Traction Control: Standard Traction Control System (TCS) Electronic Stability Control: N/A (Not widely available on 2005 USDM models) Passive Features Airbags: Front Dual-Stage SRS Airbags, Front Side SRS Airbags, Optional Curtain SRS Airbags (market dependent) Seatbelts: 3-point ELR Seatbelts with pretensioners and force limiters 💡 Technology Features Infotainment Head Unit: Standard AM/FM/CD player with 4-6 speakers. Optional premium audio systems may be available. Display: Basic LCD display for radio and clock functions. No integrated navigation or advanced screen features. Driver Assistance Cruise Control: Standard cruise control functionality Keyless Entry: Available keyless entry system Connectivity Aux Input: Rarely present on factory units, often requires aftermarket modification. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 3 months (severe service), 7,500 miles or 6 months (normal service) Engine Air Filter: Replace every 15,000 miles or 12 months Cabin Air Filter: Replace every 15,000 miles or 12 months Spark Plugs: Replace every 30,000 miles (Platinum/Iridium) Timing Belt: Inspect every 30,000 miles, Replace every 60,000 miles or 4 years (if equipped with timing belt, some later models had chains) Fluid Specifications Engine Oil Type: SAE 5W-30 Synthetic (API SG, SH, SJ, SL or ILSAC GF-2/GF-3 compliant) Engine Oil Capacity: 4.5 US quarts (4.3 L) with filter change (EJ257), 4.2 US quarts (4.0 L) with filter change (EJ205) Coolant Type: Subaru Super Coolant (Blue) or equivalent ethylene glycol-based coolant Transmission Fluid Manual: Subaru Extra-S Gear Oil (75W-90 GL-5) or equivalent Transmission Fluid Automatic: Subaru ATF-HP (if applicable) Differentials Fluid: Subaru Hypoid...