🏷️ Basic Information Identification Make: Subaru Model: Impreza STi Year: 2004 Engine Type: Gasoline Codes Chassis Code: GDB Engine Code Primary: EJ207 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback Usp: All-Wheel Drive (AWD) performance, rally-bred heritage, turbocharged power Competitive Analysis Key Competitors: Mitsubishi Lancer Evolution, Subaru WRX (non-STi variants), Volkswagen Golf GTI, Ford Focus RS Key Features Performance Orientation: Designed for enthusiast drivers seeking track-capable performance AWD System: Subaru's legendary symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) Engine Technology: High-revving, turbocharged Boxer engine Chassis Dynamics: Performance-tuned suspension and chassis for superior handling 📋 Manual Details Coverage Areas Primary Coverage: Complete Factory Service Repair Additional Coverage: Do-it-yourself (DIY) focus, comprehensive diagrams Page Count Estimated Page Count: Over 1500 pages (typical for comprehensive factory manuals) Manual Type Type: Service Manual / Repair Manual Language Language: English Format Format: Digital (PDF expected, though physical may exist) 📖 Manual Coverage Systems Covered Engine: Full engine overhaul, diagnostics, performance tuning, lubrication, cooling, fuel injection, ignition, exhaust Transmission: Manual transmission (Type RA/STi specific), clutch system, drivetrain, differentials (front, center, rear) Brakes: ABS system, hydraulic components, brake pads, rotors, calipers, parking brake Suspension: Front and rear suspension components, shock absorbers, springs, control arms, anti-roll bars, alignment procedures Steering: Power steering system, steering rack, column, troubleshooting Electrical: Wiring diagrams, lighting, starter, alternator, battery, fuses, relays, ECU, sensor diagnostics Body And Chassis: Body panel removal/installation, interior trim, chassis components, rust prevention, collision repair basics HVAC: Air conditioning system, heating, ventilation, climate control diagnostics Restraints: Airbag system, seatbelt operation and maintenance Procedures Included Maintenance: Oil changes, filter replacements, fluid flushes, spark plug replacement, timing belt inspection/replacement Troubleshooting: Diagnostic flowcharts for common problems, fault codes and their meanings Repair: Component replacement, system diagnostics, calibration procedures Diagnostics: On-board diagnostics (OBD-II), sensor testing, actuator testing, circuit testing Specifications: Torque specifications for all fasteners, tolerances, clearances Technical Depth Depth: Comprehensive, covering basic maintenance to complete engine and transmission rebuilds Diagrams Quality: Top quality, detailed illustrations and exploded views Text Readability: Easy-to-read text sections 📊 Manual Specifications File Format Digital Format: PDF (searchable text, printable pages) Print Quality Print Quality: High resolution for clear diagrams and text Binding Type Binding Type: N/A (if digital), Professional perfect binding (if printed) Paper Type Paper Type: N/A (if digital), High-quality, durable paper (if printed) ⚙️ Engine Specifications Primary Engine Engine Family: EJ Series Boxer Engine Code: EJ207 Displacement: 2.0 Liters (1994 cc) Configuration: Horizontally opposed (Boxer), 4-cylinder Aspiration: Turbocharged, Intercooled Valvetrain: DOHC, 16 valves (4 valves per cylinder) Bore X Stroke: 92.0 mm x 75.0 mm Compression Ratio: 8.0:1 Performance Horsepower Ps: 280 PS @ 6400 rpm (JDM Spec) Horsepower Hp: Approx. 276 hp @ 6400 rpm (JDM Spec) Torque Lb-Ft: 250 lb-ft @ 4400 rpm (JDM Spec) Redline: 7500 rpm Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) Fuel Type: Unleaded Premium (91 Octane minimum recommended) Ignition System: Electronic Ignition with Coil-on-Plug Turbocharger Model: IHI VF34 (or similar spec) 🔧 Transmission Standard Type: 6-speed Manual Transmission Gear Ratios Approx: 1st: 3.636, 2nd: 2.375, 3rd: 1.760, 4th: 1.345, 5th: 1.062, 6th: 0.850 Features Dccd: Driver Controlled Center Differential (manual and auto modes) Differential Type Front: Helical Limited-Slip Differential (LSD) Differential Type Rear: Viscous Limited-Slip Differential (LSD) Fluid Specifications Manual Transmission Fluid Spec: Subaru Extra-PS Fluid (or equivalent GL-5 75W-90 API) 📐 Dimensions Exterior Length: 4405 mm (173.4 in) Width: 1770 mm (69.7 in) Height: 1440 mm (56.7 in) Wheelbase: 2625 mm (103.3 in) Front Track: 1530 mm (60.2 in) Rear Track: 1525 mm (60.0 in) Weights Curb Weight Kg: Approx. 1470 kg (3240 lbs) Gross Vehicle Weight Rating Kg: Approx. 1870 kg (4120 lbs) Wheel Bolt Pattern: 5 x 100 mm Wheel Size Standard: 17 x 7.5 inches Tire Size Standard: 225/45R17 🛡️ Safety Features Ratings NHTSA Front Impact Driver: Good (for comparable models of the era) NHTSA Front Impact Passenger: Good (for comparable models of the era) IIHS Front Small Overlap: N/A (Test not standardized or performed during this era) Active Features ABS: Standard Traction Control: Yes (VDC - Vehicle Dynamics Control, often optional or specific trims) Electronic Brakeforce Distribution: Yes (part of ABS system) Passive Features Airbags Front: Driver and Passenger Airbags Airbags Side: Optional Side Airbags (check specific trim/market) Seatbelts: 3-point front and rear seatbelts, pretensioners Child Seat Anchors: LATCH/ISOFIX (rear seats) 💡 Technology Features Infotainment Head Unit: Factory AM/FM/CD player (typically basic, often upgraded by owners) Audio System: Standard speaker setup (upgrades common) Driver Assistance Cruise Control: Standard Stability Control: Vehicle Dynamics Control (VDC) available on some trims Connectivity Auxiliary Input: Rarely standard; often added via aftermarket modifications. Bluetooth: Not standard; aftermarket solutions required. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-5,000 miles or 3-6 months (depending on driving conditions and oil used) Engine Oil Filter Replacement: With every oil change Air Filter Replacement: Every 15,000-30,000 miles or as needed...