🏷️ Basic Information Identification Make: Subaru Model: Impreza Model Variant: WRX, WRX STI Model Years Covered: 2002, 2003 Codes Chassis Codes: GDB (WRX), GDB-F (STI) Engine Codes: EJ205 (2.0L Turbo WRX), EJ257 (2.5L Turbo WRX STI) 👋 Introduction Market Position Positioning: The 2002-2003 Subaru Impreza WRX and WRX STI were performance-oriented compact cars, renowned for their all-wheel-drive system and rally-bred heritage. They competed in a segment with cars like the Mitsubishi Lancer Evolution and the Volkswagen Golf GTI. Competitive Analysis Key Strengths: Subaru's Symmetrical All-Wheel Drive, turbocharged boxer engines, and agile handling made them highly desirable for performance enthusiasts. The WRX offered spirited performance, while the STI provided an even more track-focused experience with advanced features. Key Features Vehicle Appeal: These models are celebrated for their enthusiast appeal, tunability, and motorsport pedigree. This manual provides the essential information for owners to maintain and repair these iconic vehicles. 📋 Manual Details Coverage Areas General Coverage: All models and all engines for the specified years. Specific Systems: Engine Mechanical, Engine Diagnostics, Fuel Systems, Emission Control, Intake & Exhaust, Ignition, Automatic Transmission, Manual Transmission & Differential, Clutch, Suspension, Transfer Case, Wheel & Tire, Drive Shaft System, ABS, Brake, Power Steering, HVAC System, Airbag System, Lighting System, Entertainment, Interior & Exterior, Body Structure, Cruise Control System, Wiring. Page Count Estimated Page Count: Detailed page count not specified, but typical factory service manuals for this era are extensive, often exceeding 1500 pages. Manual Type Type: Factory Service Repair Workshop Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Powertrain: Complete coverage of EJ205 and EJ257 engines, including mechanical, fuel, ignition, and emission control systems. Detailed sections for both automatic and manual transmissions, clutch, drive shafts, and transfer case. Chassis And Suspension: Comprehensive coverage of suspension components, steering systems (power steering), braking systems (including ABS), wheels, tires, and drive shafts. Electrical And Body: Detailed electrical system coverage including lighting, airbags, entertainment systems, cruise control, and extensive wiring diagrams. Body structure, interior, and exterior trim repair procedures are also included. Procedures Included Diagnostic Procedures: Includes engine diagnostics, fault code identification, and troubleshooting guides for various systems. Repair Procedures: Step-by-step repair instructions for all major components, from basic maintenance to complete engine and transmission overhauls. Maintenance Procedures: Covers routine maintenance tasks, fluid changes, filter replacements, and inspection procedures. Technical Depth Depth: Factory-level technical depth, suitable for professional mechanics and experienced DIY enthusiasts. Includes exploded diagrams, torque specifications, and detailed diagnostic flowcharts. 📊 Manual Specifications File Format Compatibility: Compatible with all versions of Windows and Mac. Software Requirements: Adobe PDF Reader and WinZip. Print Quality Printability: All pages are printable. Binding Type Binding: Digital Download (PDF) - no physical binding. Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Wrx Engine: 2.0L (1994cc) EJ205 turbocharged horizontally-opposed (boxer) 4-cylinder gasoline engine. Sti Engine: 2.5L (2457cc) EJ257 turbocharged horizontally-opposed (boxer) 4-cylinder gasoline engine. Performance Wrx Horsepower: Approximately 227 hp @ 5600 rpm (US Spec). Wrx Torque: Approximately 217 lb-ft @ 4000 rpm (US Spec). Sti Horsepower: Approximately 300 hp @ 6000 rpm (US Spec). Sti Torque: Approximately 300 lb-ft @ 4000 rpm (US Spec). Fuel System Fuel Delivery: Multi-point fuel injection (MPI) with electronic throttle control. Fuel Type: Unleaded Premium Gasoline (91 octane or higher recommended). Engine Management ECU: Engine Control Unit (ECU) with knock sensor and various sensors for optimal performance and emissions. 🔧 Transmission Standard Wrx Standard Transmission: 5-speed Manual Transmission. Sti Standard Transmission: 6-speed Manual Transmission. Optional Wrx Optional Transmission: 4-speed Automatic Transmission with electronically controlled torque converter lock-up. Features AWD System: Subaru's Symmetrical All-Wheel Drive (AWD) system with front helical limited-slip differential, viscous center differential, and rear limited-slip differential (variable torque distribution based on transmission type). 📐 Dimensions Exterior Wheelbase: Approximately 100.0 inches. Length: Approximately 173.8 inches. Width: Approximately 68.1 inches. Height: Approximately 56.1 inches. Weights Curb Weight: Varies by trim and transmission, typically around 3100-3200 lbs for WRX and 3200-3300 lbs for STI. Wheels And Tires Wheel Bolt Pattern: 5x100mm. Wrx Tire Size: 205/50R16 or 215/40R17. Sti Tire Size: 225/45R17. 🛡️ Safety Features Ratings NHTSA Front Driver: 4-star (2003 model year). NHTSA Front Passenger: 4-star (2003 model year). IIHS Moderate Overlap Frontal: Good (2003 model year). Active Features Active Safety: Anti-lock Braking System (ABS), Traction Control System (TCS) on some models, Subaru's Symmetrical All-Wheel Drive. Passive Features Passive Safety: Front airbags, available side curtain airbags, front and rear crumple zones, reinforced safety cell construction. 💡 Technology Features Infotainment Audio System: Factory-installed CD player with AM/FM radio. Higher trims may have premium sound systems (e.g., McIntosh). Auxiliary input was not standard on all models. Driver Assistance Driver Aids: ABS, traction control (on some models), Symmetrical AWD. Limited electronic driver aids by modern standards. Connectivity Connectivity Features: Basic connectivity; no integrated Bluetooth or USB ports as standard. Aftermarket head unit installation...