🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX & STI Year: 2007 Codes Chassis Code: GD (for sedan), GG (for wagon) Engine Codes Wrx: EJ255 Engine Codes Sti: EJ257 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback Usp: All-wheel drive, turbocharged boxer engines, rally-inspired performance. Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Volkswagen GTI, Mazdaspeed3, Honda Civic Si Key Features Performance Focus: Engineered for spirited driving and track-day capability. Diy Support: Specifically targets 'do-it-yourself' mechanics with clear instructions. 📋 Manual Details Coverage Areas Primary Coverage: Factory Service Repair Secondary Coverage: Maintenance, Diagnostics, Troubleshooting, Repair, Overhaul Page Count Estimated Pages: 1500+ Manual Type Type: Workshop Service Manual Language Language: English Format Format: Digital (likely PDF) 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, Engine control (ECU), Fuel system, Ignition system, Exhaust system, Lubrication system, Cooling system, Turbocharger system Drivetrain: Transmission (manual, DCCD), Transfer case, Front differential, Rear differential, Driveshafts, Axles Chassis: Suspension (front/rear), Steering system, Brake system (ABS, EBD), Wheel bearings Electrical: Wiring diagrams, Lighting, Instrumentation, Power accessories, Engine management sensors, Body control modules, Audio system, Immobilizer Body: Exterior panels, Interior trim, Doors, Hood, Trunk, Glass, Seats, Safety restraints (SRS) Procedures Included Maintenance: Oil changes, Filter replacements, Fluid checks/changes, Spark plug replacement, Belt inspection/replacement, Brake pad/rotor replacement, Tire rotation Repair: Engine rebuilds, Turbocharger replacement, Transmission overhaul, Clutch replacement, Suspension component replacement, Brake caliper rebuild, Electrical component diagnosis and replacement Diagnostics: OBD-II diagnostic trouble codes (DTCs), Sensor testing, Actuator testing, Wiring continuity checks, Pressure testing (fuel, oil, coolant) Technical Depth Depth: Comprehensive factory-level detail, suitable for professional technicians and advanced DIY enthusiasts. Documentation Style: Step-by-step instructions with detailed illustrations and diagrams. 📊 Manual Specifications File Format File Type: PDF (Portable Document Format) Searchability: Likely text-searchable, allowing quick navigation to specific topics. Print Quality Resolution: High-resolution scans suitable for printing individual pages or sections. Binding Type Binding: N/A (Digital Format) Paper Type Paper Quality: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Wrx Engine Type: 2.5L DOHC Turbocharged Boxer (EJ255) Horsepower Wrx: 224 hp @ 5600 rpm Torque Wrx: 226 lb-ft @ 3600 rpm Primary Engine Sti Engine Type: 2.5L DOHC Turbocharged Boxer (EJ257, Semi-closed deck) Horsepower Sti: 305 hp @ 6000 rpm Torque Sti: 350 lb-ft @ 3600 rpm Performance Compression Ratio Wrx: 8.4:1 Compression Ratio Sti: 8.2:1 Fuel System Fuel Delivery: Sequential Multi-point Fuel Injection (MPI) Fuel Type: Premium Unleaded (91+ Octane Recommended) Ignition System: Electronic Ignition with Coil-on-Plug (COP) system 🔧 Transmission Standard Wrx Transmission: 5-speed Manual Sti Transmission: 6-speed Manual Features Sti Dccd: Driver Controlled Center Differential (DCCD) for adjustable torque split. AWD System: Subaru Symmetrical All-Wheel Drive 📐 Dimensions Exterior Length Sedan: 179.7 inches Width: 69.7 inches Height Sedan: 57.1 inches Wheelbase: 103.0 inches Weights Curb Weight Wrx: Approx. 3240 lbs Curb Weight Sti: Approx. 3373 lbs 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star NHTSA Side Impact: 5-Star Active Features ABS: Anti-lock Braking System Ebd: Electronic Brake-force Distribution Traction Control: Standard on WRX, Advanced (Active) on STI Passive Features Airbags: Frontal, Side Curtain, Front Side-Impact Seatbelts: Pretensioners with Force Limiters 💡 Technology Features Infotainment Audio System: Factory AM/FM/CD stereo with optional subwoofer and amplifier. Driver Assistance AWD Features: Symmetrical AWD provides enhanced grip and stability in various conditions. Connectivity Cruise Control: Standard feature. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 3 months (severe duty), 7,500 miles or 6 months (normal duty). Timing Belt Replacement: 105,000 miles (or as per manual inspection/recommendation). Fluid Specifications Engine Oil: SAE 0W-30 Synthetic (API SG, SH, SJ, SL, SM or ILSAC GF-2, GF-3) Transmission Fluid Wrx: SAE 75W-90 GL-5 Transmission Fluid Sti: SAE 75W-90 GL-5 (consider higher-spec for performance) Coolant: Subaru Super Coolant (50/50 mix with distilled water) Known Issues Engine Ringland Failure: Common on EJ257 engines under high stress/poor tuning. Manual covers engine assembly and specifications. Clutch Wear: High-performance nature can lead to faster clutch wear with aggressive driving. Manual details clutch inspection and replacement. Turbocharger Failures: Can occur due to oil starvation or contamination. Manual provides oil system diagnostics and turbo removal/installation. 📚 Vehicle History Brand Heritage Subaru Rally: Deep roots in World Rally Championship (WRC) success, influencing the WRX and STI models. Model Evolution Third Generation: The 2007 model represents the final year of the second-generation (GD/GG) Impreza WRX and STI, known for its distinctive 'bug-eye' and 'hawk-eye' front-end designs. Production Manufacturing Location: Ota City, Gunma, Japan 🏆 Awards & Recognition Recognitions Performance Accolades: Consistently praised by automotive media for its performance, handling, and rally-bred heritage.