🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Model Variant: WRX STI Generation Generation Code: GDB (Third Generation) Codes Chassis Codes: GDB 👋 Introduction Market Position Segment: Performance compact sedan/hatchback, rally-bred sports car. Target Audience: Enthusiasts, rally fans, performance car owners seeking detailed repair and maintenance information. Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Honda Civic Si, Volkswagen Golf GTI, Ford Focus RS (depending on region). Key Features Selling Points Vehicle: Legendary turbocharged boxer engine, Symmetrical All-Wheel Drive, aggressive styling, rally heritage, excellent handling dynamics. Selling Points Manual: Official Subaru documentation ensures accuracy and completeness, essential for maintaining the unique performance characteristics of the WRX STI. 📋 Manual Details Coverage Areas Years Covered: 2001, 2002, 2004, 2005, 2006, 2007 Regions Covered: Likely Global (varies by specific manual edition, assume US/European focus for this context) Page Count Approximate Pages: Varies significantly by manufacturer edition, typically 1000-3000+ pages for comprehensive workshop manuals. Manual Type Type: Official Workshop Service and Repair Manual Language Language: English (standard for primary documentation) Format Format: Likely Digital (PDF), potentially available in print. 📖 Manual Coverage Systems Covered Engine: Engine mechanical, lubrication system, cooling system, fuel injection, ignition system, emission control, engine management, turbocharger system. Transmission: Manual transmission (TY756), clutch system, driveline, all-wheel drive system (Symmetrical AWD). Brakes: Brake system components (front/rear discs), ABS, hydraulic system, parking brake. Suspension: Front and rear suspension, shock absorbers, springs, bushings, alignment specifications. Steering: Steering system components, power steering, steering column. Electrical: Wiring diagrams, lighting system, instrument panel, audio system, power accessories, charging system, starting system, ECUs. Body: Body exterior panels, interior trim, doors, windows, roof, underbody, chassis specifications, welding points. Climate Control: HVAC system, air conditioning, heating, ventilation. Procedures Included Maintenance: Scheduled maintenance intervals, fluid changes (oil, coolant, brake, transmission), filter replacements, spark plug service. Diagnostics: Troubleshooting guides, symptom-based diagnostics, DTC (Diagnostic Trouble Code) interpretation, testing procedures for components. Repair: Step-by-step repair procedures for all major systems, including engine overhaul, transmission rebuild, brake component replacement, suspension work, electrical component repair. Installation: Procedures for replacing various parts and components, including engine mounts, exhaust systems, body panels, electrical modules. Specifications: Torque specifications for fasteners, clearances, fluid capacities, electrical system parameters, diagnostic readings. Technical Depth Depth: Comprehensive: Covers everything from basic maintenance to full engine and transmission rebuilds. Includes detailed schematics, diagnostic procedures, and component-level repair instructions. 📊 Manual Specifications File Format Digital Format: PDF (Portable Document Format) - typically optimized for searchability and printing. Print Quality Quality: High-resolution scans or original manufacturer digital files, ensuring clarity of diagrams and text. Binding Type Binding: N/A for digital, if printed would typically be spiral-bound or perfect-bound for durability in a workshop environment. Paper Type Paper Type: N/A for digital, if printed would be durable paper stock suitable for workshop use. ⚙️ Engine Specifications Primary Engine Engine Code: EJ257 (for most STI models of this generation) Engine Type: 2.5L (2457cc) DOHC Turbocharged Boxer-4 Bore X Stroke: 99.5 mm x 79.0 mm Compression Ratio: 8.0:1 Performance Horsepower Est: Approx. 300-320 hp (varies by market and specific year/tune) Torque Est: Approx. 300-330 lb-ft (varies by market and specific year/tune) Fuel System Fuel Delivery: Multi-point fuel injection (MPI) with sequential fuel injection and ECU control. Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended/required) Engine Management ECU: Subaru Engine Control Unit (ECU) with specific STI tuning. Turbocharger Turbo Model: IHI VF37 or similar (variable wastegate twin-scroll turbocharger) 🔧 Transmission Standard Type: 6-speed manual transmission Gear Ratios Typical: Refer to manual for specific ratios; generally close-ratio for performance driving. Optional Type: None (STI models exclusively manual transmission during this generation) Features Drivetrain: Symmetrical All-Wheel Drive (AWD) with Driver Controlled Center Differential (DCCD). Clutch: Hydraulically operated multi-plate clutch. Fluid Specs Transmission Fluid: Refer to manual for specific Subaru specifications (e.g., GL-5 gear oil, often 75W-90). 📐 Dimensions Exterior Length Est: Approx. 4415 mm (Sedan), 4405 mm (Wagon - if applicable) Width Est: Approx. 1770 mm Height Est: Approx. 1440 mm (Sedan) Wheelbase Est: Approx. 2625 mm Weights Curb Weight Est: Approx. 1500-1550 kg Gross Vehicle Weight Rating Est: Refer to manual or VIN plate. Towing Capacity: Not generally specified or recommended for STI models. 🛡️ Safety Features Ratings NHTSA Ratings Typical: Varies by year and specific test, but generally good for its era, though specific STI crash data might be limited separately. Active Features AWD: Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) enhances traction and stability. ABS: Anti-lock Braking System (ABS). Traction Control: Active Differential Control (DCCD) and AWD system contribute to traction management. Passive Features Airbags: Front airbags, side airbags (availability may vary by year/trim). Seatbelts: 3-point seatbelts with pre-tensioners and load limiters. Body Structure: Reinforced chassis and crumple zones. 💡 Technology Features Infotainment Head Unit: Typically a factory-branded AM/FM/CD player. Upgrades common. Audio System: Standard speaker setup, some trims may offer premium audio options. Driver...