🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX / WRX STI Model Generation: Second Generation (GD/GG) Model Years Covered: 2004, 2005 Codes Chassis Codes: GD (Sedan), GG (Wagon) Engine Codes Wrx: EJ205 Engine Codes Sti: EJ257 👋 Introduction Market Position Vehicle Segment: Compact Sports Sedan/Wagon (Performance Variant) Target Audience: Enthusiasts, DIY mechanics, owners seeking detailed technical information for maintenance and modifications Competitive Analysis Key Competitors: Mitsubishi Lancer Evolution, Honda Civic Si, Volkswagen GTI, Ford Focus SVT Key Features Performance Focus: Designed for owners who prioritize performance tuning and detailed understanding of the WRX/STI's unique systems Value Proposition: Provides extensive technical data, repair procedures, and diagnostic information, enabling significant cost savings on maintenance and repairs. 📋 Manual Details Coverage Areas Manual Type: Service and Repair Manual Language: English Format: PDF Content Scope: Comprehensive; includes maintenance, repair, diagnostics, and technical specifications 📖 Manual Coverage Systems Covered Powertrain: Engine, Turbocharger, Intercooler, Fuel System, Exhaust System, 5-speed Manual Transmission (WRX), 6-speed Manual Transmission (STI), Center Differential, Rear Differential, Driveline Chassis: Suspension (Front & Rear), Steering System, Brakes (Front & Rear), Wheels & Tires Electrical: Wiring Diagrams, Ignition System, Lighting, Instrument Panel, Audio System, HVAC Controls, ECU/ECM Functions Procedures Included Maintenance: Oil changes, filter replacements, spark plug service, coolant flushing, brake fluid replacement, timing belt inspection/replacement (if applicable), differential fluid changes, clutch fluid service Diagnostics: Troubleshooting guides for common symptoms, fault code interpretation, electrical circuit testing, fuel system diagnostics, engine performance issues Repair Rebuild: Engine component replacement (pistons, rods, bearings), turbocharger overhaul, transmission rebuild, brake caliper service, suspension component replacement, steering rack repair Technical Depth Diagnostic Tools: Information on using Subaru Select Monitor (SSM) or compatible OBD-II scanners for diagnostics Torque Specifications: Detailed torque values for all critical fasteners throughout the vehicle Alignment Specs: Wheel alignment specifications for front and rear suspensions 📊 Manual Specifications File Format File Type: PDF Searchability: Likely searchable text (OCR quality dependent) Compatibility: Windows, Linux, macOS Print Quality Resolution: High resolution for clarity of diagrams and text Binding Type Binding: N/A (Digital PDF) Paper Type Paper: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type Wrx: 2.0L Turbocharged Boxer 4-Cylinder (EJ205) Engine Type Sti: 2.5L Turbocharged Boxer 4-Cylinder (EJ257) Performance Horsepower Wrx: Approx. 227 hp @ 5600 rpm (Varies by market and specific model year tuning) Torque Wrx: Approx. 217 lb-ft @ 3200 rpm (Varies by market and specific model year tuning) Horsepower Sti: Approx. 300 hp @ 6000 rpm Torque Sti: Approx. 300 lb-ft @ 4000 rpm Fuel System Fuel Delivery: Multi-port Fuel Injection (MPI) Fuel Type: Premium Unleaded Gasoline (91 Octane or higher recommended) Cooling Cooling System: Pressurized liquid cooling system with electric cooling fans Intercooler Intercooler Type: Air-to-Air Top-Mounted (TMIC) Turbocharger Turbocharger Type Wrx: Mitsubishi TD04L-13T (approx.) Turbocharger Type Sti: IHI VF39 (approx.) 🔧 Transmission Standard Transmission Type Wrx: 5-speed Manual Transmission Type Sti: 6-speed Manual Optional Optional Transmission: None (Performance models exclusively manual) Features Dccd: Driver Controlled Center Differential (Standard on STI) AWD System: Symmetrical All-Wheel Drive with front helical limited-slip differential and rear viscous limited-slip differential (STI also features DCCD) 📐 Dimensions Exterior Wheelbase: Approx. 104.9 inches (2664 mm) Length: Sedan: Approx. 174.5 inches (4432 mm) / Wagon: Approx. 176.4 inches (4480 mm) Width: Approx. 69.7 inches (1770 mm) Height: Sedan: Approx. 56.1 inches (1425 mm) / Wagon: Approx. 57.7 inches (1465 mm) Weights Curb Weight Wrx: Approx. 3130 - 3200 lbs (1420 - 1450 kg) Curb Weight Sti: Approx. 3250 - 3350 lbs (1475 - 1520 kg) Gross Vehicle Weight Rating: Available in manual, typically around 4200 lbs 🛡️ Safety Features Ratings NHTSA Front Impact: Likely 4-star (Individual model year testing data required for exact confirmation) IIHS Side Impact: Likely Good (Individual model year testing data required for exact confirmation) Active Features ABS: Standard Anti-lock Braking System Traction Control: Standard Traction Control System (TCS) Electronic Brakeforce Distribution: Standard Electronic Brake-force Distribution (EBD) Passive Features Airbags: Front airbags, side airbags (optional or standard depending on trim/market) Seatbelts: 3-point front and rear seatbelts with pretensioners Body Structure: Advanced safety structure with crumple zones 💡 Technology Features Infotainment Audio System: Factory AM/FM/CD player with multiple speakers. Limited advanced tech compared to modern vehicles. Instrument Cluster: Driver-focused layout with tachometer, speedometer, and auxiliary gauges (e.g., boost gauge on STI). Driver Assistance Cruise Control: Standard cruise control Connectivity Usb Aux Ports: Not typically factory-equipped; aftermarket solutions common. 🔧 Maintenance Service Intervals Oil Change Interval: Typically 3,000-5,000 miles or 6 months, whichever comes first (depending on driving conditions and oil type used). Spark Plug Replacement: Around 60,000 miles (iridium plugs) Timing Belt Replacement: Typically 90,000 - 105,000 miles or 7-8 years (critical for EJ engines). Fluid Specifications Engine Oil Type: SAE 5W-30 Synthetic (or manufacturer's specific recommendation, check manual for exact spec, e.g., API SN/SP) Transmission Fluid Type 5Mt: API GL-4 Gear Oil, SAE 75W-90 Transmission Fluid Type...