🏷️ Basic Information Identification Make: Subaru Model: Impreza Year: 2002 Trim Level Covered: WRX STI Body Styles Covered: Sedan and Wagon Codes Chassis Code: GD/GG Engine Codes Covered: EJ20G (DOHC Turbocharged), EJ201/EJ202 (SOHC Naturally Aspirated) 👋 Introduction Market Position Market Position: The 2002 Subaru Impreza WRX STI (GD/GG chassis) represents the pinnacle of Subaru's performance offerings for that era, built upon the success of its rally heritage. This model is highly sought after by enthusiasts for its turbocharged boxer engine, symmetrical all-wheel-drive system, and sporty handling characteristics. Competitive Analysis Competitive Analysis: Competed against performance variants of cars like the Mitsubishi Lancer Evolution, Ford Focus RS, and Volkswagen Golf GTI. Its unique boxer engine and AWD system provided distinct advantages in traction and handling, particularly in adverse conditions. Key Features Key Features: Turbocharged Boxer Engine, Symmetrical All-Wheel Drive, performance-tuned suspension, sport seats, aerodynamic body kit, advanced intercooler system, robust drivetrain. Performance Enhancements Sti: The WRX STI variant featured a more powerful engine, upgraded suspension components (often inverted front struts), larger brakes, a more aggressive aerodynamic package, and the signature DCCD system for advanced torque distribution. 📋 Manual Details Coverage Areas Coverage Areas: General Maintenance, SOHC Engine, DOHC Engine, Transmission, Chassis, Body, Wiring Page Count Page Count: Estimated 1000+ pages (typical for a comprehensive factory service manual) Manual Type Manual Type: Factory Service Workshop Repair Manual Manual Purpose: A comprehensive guide for diagnosing, repairing, and maintaining the 2002 Subaru Impreza, covering all aspects of the vehicle for professional and DIY use. Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Systems Covered: Engine mechanical (SOHC & DOHC), fuel system, ignition system, exhaust system, cooling system, lubrication system, starting system, charging system, manual transmission, automatic transmission (if applicable), drivetrain (AWD), suspension system (front & rear), steering system, braking system (including ABS), HVAC system, body electrical, interior/exterior trim, chassis components, collision repair, diagnostic procedures, wiring diagrams. Interior Body Systems: Interior trim removal and installation, door mechanisms, window regulators, seat removal, dashboard disassembly, headliner, carpeting, exterior body panel replacement, bumpers, fenders, doors, hood, trunk lid, glass replacement. Electrical System: Comprehensive wiring diagrams for all major systems including engine control, lighting, audio, HVAC, power accessories, security system, ABS, SRS (Airbag) system. Includes troubleshooting guides and component locations. Procedures Included Procedures Included: Routine maintenance (oil changes, filter replacements, inspections), engine diagnostics and repair (timing belt replacement, head gasket repair, turbocharger service), transmission service and overhaul, brake system bleeding and component replacement, suspension and steering alignment and component replacement, electrical system troubleshooting and repair, body panel repair and replacement, air conditioning system servicing, diagnostic trouble code (DTC) interpretation and resolution, wiring harness repair, safety system checks. Engine Rebuild Procedures: Detailed procedures for engine disassembly, inspection, component replacement (pistons, rings, bearings, valves, camshafts), torque specifications for all fasteners, engine assembly, and break-in procedures. Transmission Repair: Complete overhaul procedures for both manual and automatic transmissions, including gear inspection, synchro replacement, clutch assembly service, torque converter replacement, and transmission fluid change procedures. Wheel Alignment: Detailed specifications and procedures for front and rear wheel alignment (camber, caster, toe), including necessary adjustments. Technical Depth Technical Depth: Comprehensive, covering everything from basic adjustments and maintenance to complete engine and transmission overhauls, advanced diagnostic procedures, and detailed wiring schematics. Suitable for professional technicians and advanced DIY enthusiasts. Diagnostic Charts: Includes detailed diagnostic flowcharts for common symptoms, fault codes, and electrical system issues, aiding in systematic troubleshooting. Emission Controls: Information on emission control systems, components, diagnostic procedures, and troubleshooting related to emissions compliance. 📊 Manual Specifications File Format File Format: PDF (Portable Document Format), typically with searchable text for easy navigation. Searchability: High-quality PDF with selectable text for keyword searching, allowing users to quickly find specific repair or diagnostic information. Print Quality Print Quality: High-resolution scans or native digital files, ensuring clarity of diagrams, schematics, and text. Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Primary Engine: 2.0L EJ207 DOHC Turbocharged Boxer Engine (WRX STI) Ej201 Ej202 Specs: 2.0L EJ201/EJ202 SOHC Naturally Aspirated Boxer Engine. Approx. 125-145 hp depending on specific market/tune. Performance Horsepower Sti: Approx. 265 PS (195 kW; 261 hp) at 6,000 rpm (JDM/European specs) Torque Sti: Approx. 343 Nm (253 lb-ft) at 4,000 rpm (JDM/European specs) Engine Layout: Horizontally-opposed (Boxer) Fuel System Fuel System: Multi-point Fuel Injection (MPI), Turbocharged with intercooler Fuel Type Required: Premium Unleaded Gasoline (91 octane or higher recommended for turbo models). Engine Codes Covered Engine Codes Covered: EJ207 (DOHC Turbocharged - WRX STI), EJ201/EJ202 (SOHC Naturally Aspirated - standard Impreza models) 🔧 Transmission Standard Standard Transmission Sti: 6-speed Manual Transmission Optional Optional Transmission: 4-speed Automatic Transmission (typically for non-STI models) Features Drivetrain Type: Symmetrical All-Wheel Drive (AWD) Differential Type: Driver Controlled Center Differential (DCCD) on WRX STI models 📐 Dimensions Exterior Wheelbase: Approx. 2510 mm...