🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2004 👋 Introduction Market Position Vehicle Class: Compact Performance Sedan/Wagon (World Rally Blue Mica, Obsidian Black Pearl, Aspen White, Sonic Yellow) Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Ford Focus RS, Volkswagen Golf R. Key Features Performance Focus: The WRX STI is a homologation special designed for rallying, emphasizing potent turbocharged performance, advanced AWD, and precise handling. Manual Value Proposition: Provides essential technical data for DIY enthusiasts and professional mechanics to maintain and repair the iconic 2004 Impreza WRX STI. 📋 Manual Details Identification Product Name: 2004 Subaru Impreza WRX Sti Service Repair Manual Product Description: 2004 Subaru Impreza WRX Sti Repair Service Manual Format File Format: PDF Language Language: English Delivery Method Of Delivery: Immediate Download 📖 Manual Coverage Systems Covered Engine: Comprehensive coverage of the EJ257 engine, including disassembly, assembly, diagnosis, and repair. Engine Management: Detailed information on the ECU, sensors, actuators, fuel injection, ignition timing, and emissions control systems. Transmission: Coverage for the 6-speed manual transmission (TY856WB1CA), including clutch, gearbox, differentials, and driveline components. Drivetrain: Information on AWD system, center differential, front and rear differentials, axles, and driveshafts. Suspension: Front and rear suspension components, including struts, springs, control arms, bushings, and alignment procedures. Brakes: Front and rear brake systems, including Brembo calipers, rotors, brake pads, hydraulic lines, ABS, and parking brake. Steering: Power steering system, steering rack, tie rods, and steering column. Electrical System: Comprehensive wiring diagrams, fuse box layouts, lighting systems, charging system (alternator, battery), starting system, and accessory circuits. HVAC: Heating, Ventilation, and Air Conditioning system, including compressor, condenser, evaporator, refrigerant, and controls. Body And Chassis: Body panels, doors, hood, trunk, bumpers, interior trim, chassis components, and corrosion protection. Interior: Seats, dashboard, center console, door panels, headliner, and associated trim components. Safety Systems: Airbag system, seat belts, and any associated SRS components. Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, air filter replacement. Component Replacement: Detailed step-by-step instructions for replacing major and minor components across all systems. Troubleshooting: Diagnostic flowcharts and symptom-based troubleshooting guides for common and uncommon issues. Diagnostics: Procedures for using diagnostic tools (OBD-II scanner) and interpreting fault codes. Adjustment And Calibration: Procedures for wheel alignment, brake adjustments, clutch adjustment, and other critical calibrations. Rebuilds: Detailed instructions for engine and transmission rebuilds, including torque specifications and clearances. Wiring Repairs: Guidance on diagnosing and repairing electrical wiring issues, including connector pinouts. Body Repair: Information on panel removal, replacement, and minor bodywork procedures. Technical Depth Depth: Comprehensive: Covers everything from basic scheduled maintenance and fluid checks to complete engine and transmission overhauls, complex electrical diagnostics, and bodywork. 📊 Manual Specifications File Details File Format: PDF Searchability: Likely text-searchable, allowing for quick navigation of specific topics. Printability: Printable, allowing users to create physical copies for workshop use. Compatibility: Compatible with Windows and MAC operating systems. Quality Content Quality: Reputed to be the 'most updated' and 'perfect' version available, aiming for high accuracy and clarity. Presentation: Delivered directly to the computer screen for immediate access. ⚙️ Engine Specifications Primary Engine Engine Code: EJ257 Engine Type: 2.5-liter turbocharged flat-four (Boxer) Performance Horsepower: 300 PS (296 hp) at 6000 rpm Torque: 290 lb-ft (393 Nm) at 4000 rpm Fuel System Fuel Delivery: Multi-point fuel injection (MPI) with Denso 550cc fuel injectors. Fuel Type: Premium Unleaded (91 octane or higher recommended) Turbocharger Turbocharger Spec: IHI VF39 twin-scroll turbocharger with intercooler. 🔧 Transmission Standard Transmission Type: 6-speed manual transmission (TY856WB1CA) Features AWD System: Subaru's Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD). Fluid Specifications Transmission Fluid: Refer to manual for specific Subaru Extra-S Gear Oil or equivalent SAE 75W-90 API GL-5. 📐 Dimensions Exterior Length: 4415 mm (173.8 in) Width: 1770 mm (69.7 in) Height: 1440 mm (56.7 in) Wheelbase Wheelbase: 2620 mm (103.2 in) Weights Curb Weight: Approx. 1470 kg (3240 lbs) Cargo Trunk Volume: Approx. 392 liters (13.8 cu ft) for sedan. 🛡️ Safety Features Ratings NHTSA Rating Front Driver: 5-star NHTSA Rating Front Passenger: 5-star IIHS Rating Driver Side Front Impact: Good Active Features ABS: 4-wheel Anti-lock Braking System (ABS). Ebc: Electronic Brake-force Distribution (EBD). Traction Control: Active traction control. Passive Features Airbags: Front dual-stage airbags, front side airbags. Seatbelts: 3-point seatbelts with pretensioners and load limiters. 💡 Technology Features Infotainment Audio System: Standard AM/FM/CD player with 4-6 speaker system. Options for premium audio. Driver Assistance AWD Dccd: Driver Controlled Center Differential (DCCD) allows manual adjustment of front-to-rear torque split for varying conditions. Connectivity OBD Port: Standard OBD-II port located under the dashboard for diagnostic access. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 6 months, whichever comes first (severe driving conditions), or 7,500 miles / 12 months (normal). Timing Belt Replacement: Every 105,000 miles or 105 months (critical component, refer to manual for exact procedure). Spark...