🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX & STI Year: 2004 Codes Chassis Code: GDB 👋 Introduction Market Position Positioning: High-performance rally-bred sedan and hatchback known for its turbocharged Boxer engine and Symmetrical All-Wheel Drive system. Competes with vehicles like the Mitsubishi Lancer Evolution. Competitive Analysis Key Rivals 2004: Mitsubishi Lancer Evolution VIII, Subaru WRX (non-STI variants), possibly higher-performance trims of mainstream sedans. Key Features Performance Focus: Engineered for spirited driving, track days, and rallying. Features turbocharged power, advanced AWD, and robust chassis. User Base Target Audience: Enthusiasts, amateur mechanics, professional technicians, and owners seeking to maintain their performance vehicle. 📋 Manual Details Coverage Areas Primary Coverage: Full service, repair, and maintenance for 2004 Subaru Impreza WRX and STI models. Page Count Estimated Page Count: Refer to product description for exact count (typically 1000+ pages for comprehensive factory service manuals). Manual Type Type: Factory Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Engine removal/installation, cylinder head, valve train, engine block, lubrication, intake/exhaust systems, timing procedures, chain/gear replacement. Engine Performance: Tune-up procedures, fuel and emissions control, ignition system, emissions control systems. Drivetrain: Transaxle, clutch, manual transmission, automatic transmission (if applicable to WRX/STI variants), differential, driveshaft. Chassis And Suspension: Steering system, suspension components, brake system (including ABS). Body And Interior: Body panels, interior components, heater, air conditioning, automatic climate control. Electrical: General electrical systems, wiring diagrams, Supplemental Restraint System (SRS), including diagnostics and component testing. Procedures Included Routine Maintenance: Scheduled maintenance tasks, fluid checks and changes, filter replacements. Engine Repair: Complete engine overhaul, component replacement, troubleshooting of internal engine issues. Transmission Service: Manual transmission overhaul, clutch replacement, differential service. Brake System Service: Brake pad replacement, rotor resurfacing/replacement, ABS system diagnostics and repair. Electrical Diagnostics: Wiring diagram interpretation, troubleshooting electrical faults, SRS system diagnostics. Air Conditioning Service: Refrigerant handling, system diagnostics, component replacement. Timing Procedures: Valve timing adjustment, chain/gear replacement, tensioner adjustment and release/reset methods, timing marks identification. Technical Depth Depth: Comprehensive, covering basic maintenance to complete engine and component rebuilds. Includes detailed specifications, troubleshooting guides, and diagnostic procedures suitable for professional technicians and advanced amateurs. 📊 Manual Specifications File Format Compatibility: All Versions of Windows & Mac Reader Requirements: Adobe PDF Reader Extraction Requirements: WinZip Print Quality Quality: Designed for clarity and legibility with easy-to-read type. Binding Type Binding: Digital (PDF file) Paper Type Paper Type: N/A (Digital Format) Searchability Text Searchable: Likely text-searchable within the PDF format, allowing for quick access to specific topics. ⚙️ Engine Specifications Primary Engine Engine Code: EJ207 (for STI, typically JDM spec in 2004, USDM WRX used EJ205) Engine Type: Horizontally Opposed (Boxer) Turbocharged DOHC 16-Valve Inline-4 Performance Sti Horsepower: Approx. 265-280 PS (195-206 kW; 261-276 hp) - varies by market and specific tune. Sti Torque: Approx. 343-358 Nm (253-264 lb-ft) Wrx Horsepower Usdm: Approx. 227 hp (169 kW; 230 PS) Wrx Torque Usdm: Approx. 217 lb-ft (294 Nm) Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) with Turbocharger Recommended Fuel: Premium Unleaded Gasoline (91 Octane or higher) Cooling System Coolant Capacity: Approx. 6.7 Liters (7.1 US Quarts) - refer to manual for exact amount. Lubrication System Oil Capacity With Filter: Approx. 4.5 Liters (4.8 US Quarts) - refer to manual for exact amount. Recommended Engine Oil: SAE 5W-30 Synthetic (or as specified by Subaru for performance use). 🔧 Transmission Standard Type: 6-Speed Manual Transmission (STI), 5-Speed Manual Transmission (WRX) Optional Type: Automatic Transmission not typically offered on WRX/STI performance models of this era, but verify specific market packages. Features AWD System: Subaru Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) on STI. Fluid Specifications Manual Transmission Fluid: GL-5 Hypoid Gear Oil, SAE 75W-90 (refer to manual for exact Subaru specifications and capacities). Differential Fluid: GL-5 Hypoid Gear Oil, SAE 75W-90 (front and rear differentials). 📐 Dimensions Exterior Wheelbase: Approx. 2,510 mm (98.8 inches) Length: Approx. 4,405 mm (173.4 inches) Width: Approx. 1,740 mm (68.5 inches) Height: Approx. 1,415 mm (55.7 inches) Weights Curb Weight: Approx. 1,400-1,450 kg (3,086-3,197 lbs) - varies by trim and options. Gross Vehicle Weight Rating: Refer to vehicle placard/manual. Towing Capacity: Not specified/intended for towing. Wheel And Tire Wheelbase Sti: 2510 mm (98.8 in) Wheelbase Wrx: 2510 mm (98.8 in) Bolt Pattern: 5 x 100 mm Tire Size Sti Standard: 225/45R17 Tire Size Wrx Standard: 215/45R17 (or 205/55R16 on some base models) 🛡️ Safety Features Ratings NHTSA Front Impact: Not explicitly rated for 2004 model year in all markets; consult specific regional reports if available. Generally considered robust for its class. IIHS Ratings: Refer to IIHS archives for specific crash test performance. Active Features ABS: Standard Anti-lock Braking System Traction Control: Limited Slip Differentials (Front/Rear), Driver Controlled Center Differential (DCCD on STI) Passive Features Airbags: Driver and Passenger Frontal Airbags (SRS) Srs System Coverage: Manual provides detailed procedures for...