🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2007 Generation Chassis Code: GD/GG Generation Designation: Third Generation (GD/GG - Hawk Eye) Codes Engine Code Primary: EJ257 👋 Introduction Market Position Segment: Performance Compact Sedan/Wagon Target Audience: Enthusiast owners, independent repair shops, performance tuners Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Ford Focus RS (in spirit) Key Features Rally Heritage: Directly derived from Subaru's World Rally Championship lineage, emphasizing AWD and turbocharged performance Performance Focus: Engineered for high-performance driving, road holding, and driver engagement Manual Value Proposition: Enables owners to maintain, diagnose, and repair their high-performance vehicle effectively, saving on dealership costs and ensuring proper upkeep. 📋 Manual Details Coverage Areas Primary Coverage: 2007 Subaru Impreza WRX STI (GD/GG chassis) Page Count Estimated Pages: Extensive (specific count not provided, typical workshop manuals are 1000+ pages) Manual Type Type: Workshop Repair Service Manual Language Language: English Format Digital Format: PDF Compatibility Operating Systems: All Versions of Windows & Mac Requirements Software Requirement: Adobe PDF Reader 📖 Manual Coverage Systems Covered Engine: Comprehensive (EJ257 STI specific, including timing, lubrication, cooling, fuel injection, ignition, emissions, turbocharging) Transmission: Complete (Manual AWD transmission, differential, clutch system) Chassis: Detailed (Suspension, steering, brakes, wheel alignment, chassis components) Body: Extensive (Exterior and interior trim, body panels, doors, glass, safety systems related to body structure) Electrical: Comprehensive (Wiring diagrams, lighting, ignition system, power distribution, ECUs, sensors, actuators) Mechanism And Function: In-depth explanation of how various systems operate and interact Procedures Included General Information: Vehicle overview, safety precautions, general procedures, torque specifications Engine Overhaul: Detailed procedures for engine disassembly, inspection, repair, and reassembly Transmission Repair: Steps for clutch replacement, transmission disassembly/reassembly, differential service Brake System: Service for disc brakes, parking brake, hydraulic systems Suspension And Steering: Repairs and adjustments for struts, control arms, steering rack, power steering Electrical Diagnostics: Troubleshooting guidance for electrical faults using wiring diagrams and test procedures Bodywork Repair: Guidelines for body panel replacement, door mechanisms, glass installation Maintenance Tasks: Routine maintenance procedures (oil change, filter replacement, spark plugs, etc.) Technical Depth Depth Level: Professional/Expert Diagnostic Capabilities: Advanced diagnostic procedures, including sensor data interpretation and fault code identification Rebuild Procedures: Comprehensive rebuild instructions for major components like engine and transmission 📊 Manual Specifications File Format Format: PDF Searchability: Likely text-searchable PDF Printability: Printable Print Quality Quality: High-quality digital reproduction (assumed for professional manual) Binding Type Binding: Not Applicable (Digital PDF) Paper Type Paper: Not Applicable (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type: Horizontally Opposed (Boxer), turbocharged, intercooled, DOHC, 16-valve Engine Code: EJ257 Displacement: 2.5 Liters (2457 cc) Performance Horsepower Rated: 305 hp @ 5200 rpm (North American spec) Torque Rated: 290 lb-ft @ 3000 rpm (North American spec) Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) with Electronic Throttle Control (ETC) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) 🔧 Transmission Standard Type: 6-speed Manual Transmission (TY856) Drivetrain: Symmetrical All-Wheel Drive (AWD) with Driver Controlled Center Differential (DCCD) Optional Optional Availability: None for WRX STI model Features Differentials: Front Helical Limited-Slip Differential (LSD), Rear Mechanical Limited-Slip Differential (LSD), DCCD 📐 Dimensions Exterior Length: 4415 mm (173.8 in) - Sedan Width: 1795 mm (70.7 in) Height: 1440 mm (56.7 in) - Sedan Wheelbase: 2625 mm (103.3 in) Weights Curb Weight: Approx. 1480 kg (3263 lbs) - Sedan Gross Vehicle Weight Rating: Not specified, typically around 1950 kg 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star (for driver and passenger) IIHS Front Offset: Good Active Features ABS: Standard Anti-lock Braking System E Brake: Electronic Brake-force Distribution (EBD) Traction Control: Standard Traction Control System (TCS) Stability Control: Standard Vehicle Dynamics Control (VDC) Passive Features Airbags Front: Driver and front passenger airbags Airbags Side: Front side-impact airbags Airbags Curtain: Standard front and rear curtain airbags Seatbelts: 3-point front and rear seatbelts with pretensioners 💡 Technology Features Infotainment Head Unit: Factory AM/FM/CD audio system with premium speaker option. Bluetooth and MP3 capability may vary by trim. Display: Basic LCD display for audio and vehicle information. Driver Assistance Cruise Control: Standard electronic cruise control Ccd: Driver Controlled Center Differential (DCCD) for advanced torque distribution management. Connectivity Aux Input: Auxiliary audio input jack typically present. 🔧 Maintenance Service Intervals Oil Change: Every 3,750 miles or 6 months (severe duty/performance driving), or 7,500 miles/12 months (normal driving) Engine Oil Filter: Replace with every oil change Air Filter: Inspect every 7,500 miles, replace as needed or every 30,000 miles Spark Plugs: Replace at 60,000 miles (Iridium type recommended) Timing Belt: Not Applicable (This generation uses a timing chain) Fluid Specifications Engine Oil: SAE 5W-30, API SG or higher, fully synthetic recommended for performance driving Coolant: Subaru Super Coolant (Blue) or equivalent ethylene glycol-based coolant with Subaru conditioners, 50/50 mix with distilled water Brake Fluid: DOT 3 or DOT 4 brake fluid Transmission Fluid: Subaru Extra-S Gear Oil (or...