🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STi Year: 2004 Chassis Code: GDB (Wide Body) Market Segment: Compact Sport Sedan / Hatchback 👋 Introduction Market Position Historical Context: The 2004 Impreza WRX STi (GDB chassis) represents a significant evolution of Subaru's rally-bred performance icon, building on the legacy of the GC8 chassis. This model introduced the wider body, improved suspension, and a more potent engine, solidifying its reputation as a highly capable all-wheel-drive performance car. Competitive Analysis Competitors: Competed against performance variants of cars like the Mitsubishi Lancer Evolution, Ford Focus RS, Volkswagen Golf R32, and various European hot hatches. Key Features Performance Differentiation: Renowned for its Symmetrical All-Wheel Drive system, turbocharged Boxer engine, and robust chassis, offering exceptional grip and handling in diverse conditions. Value Proposition Manual Benefit: This manual empowers owners and enthusiasts to perform intricate maintenance and repairs, significantly reducing reliance on dealership services and preserving the vehicle's performance potential. 📋 Manual Details Coverage Areas Manual Type: Workshop Service Repair Manual Language: English Format: Digital (likely PDF) Completeness: 100% Complete, no missing/corrupt pages Delivery Method: Instant Download 📖 Manual Coverage Systems Covered Engine: Complete overhaul, rebuilding, performance tuning, diagnostics, troubleshooting Engine Management: Engine control unit (ECU), sensors, actuators, fuel injection, ignition system Transmission: Manual transmission (TY757VW1AA), removal, installation, in-car servicing, lubrication Drivetrain: All-Wheel Drive (AWD) system, differentials (front, center, rear), U-Joints, CV-Joints Brakes: Hydraulic system, anti-lock braking system (ABS), brake pad/rotor replacement, caliper servicing, bleeding procedures Suspension: Front and rear suspension components, shock absorbers, springs, bushings, alignment procedures and specifications Steering: Power steering system, steering rack, tie rods, alignment specifications Electrical System: Complete wiring diagrams, battery, charging system, starting system, lighting, accessories, fuses, relays Climate Control: Air conditioning (AC) system, refrigerant capacities, compressor, condenser, evaporator servicing Body And Trim: Interior and exterior trim removal/installation, sunroof operation and servicing Procedures Included Maintenance: Factory maintenance schedules and charts, fluid changes (oil, coolant, brake, transmission, differential), filter replacements (oil, air, fuel, cabin) Repair: Step-by-step instructions for all major component repairs and replacements Troubleshooting: Diagnostic trouble codes (DTCs), computer diagnostic trouble tree charts, troubleshooting guides for common driving concerns Diagnostics: Detailed diagnostic procedures for engine performance, emissions, and other systems Timing Belt: Timing belt replacement procedures, tensioner adjustment, serpentine belt routings with diagrams Alignment: Front end and alignment procedures and specifications Wiring: Complete wiring diagrams for all vehicle systems Torque Specifications: Complete torque specifications for all fasteners Technical Depth Depth: Comprehensive, from basic maintenance to complete engine and transmission rebuilds Detail Level: Highly detailed with step-by-step instructions, diagrams, and illustrations Target Audience: Professional technicians, mechanics, and DIY enthusiasts 📊 Manual Specifications File Format File Format: Likely PDF (searchable text and high-resolution images) Print Quality Image Quality: High-resolution illustrations and pictures Text Clarity: Clear and easy-to-read text Binding Type Binding: Not applicable for digital format, but implies a complete, organized document Paper Type Paper Type: Not applicable for digital format ⚙️ Engine Specifications Primary Engine Engine Code: EJ257 Engine Type: 2.5L DOHC 16-valve turbocharged flat-four (Boxer) Performance Horsepower: 300 PS (296 hp) at 6000 rpm (JDM/Euro spec), 300 hp at 6000 rpm (USDM spec) Torque: 350 Nm (258 lb-ft) at 4000 rpm (JDM/Euro spec), 300 lb-ft at 4000 rpm (USDM spec) Fuel System Fuel Delivery: Sequential multi-port fuel injection (MPI) Turbocharger: IHI VF39 (USDM) or VF37 (JDM), twin-scroll Engine Management ECU: ECU controlled ignition timing and fuel injection Timing Timing Belt Type: Timing Belt driven camshafts 🔧 Transmission Standard Type: 6-speed Manual Transmission (TY757VW1AA) Optional Type: Not available for the WRX STi model Features All Wheel Drive: Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) Clutch: Hydraulically actuated, single-plate, dry-type clutch 📐 Dimensions Exterior Length: Approximately 4,415 mm (173.8 in) Width: Approximately 1,770 mm (69.7 in) Height: Approximately 1,400 mm (55.1 in) Wheelbase: Approximately 2,510 mm (98.8 in) Weights Curb Weight: Approximately 1,460 kg (3,219 lbs) Gross Vehicle Weight Rating: Varies by market, consult specific vehicle documentation 🛡️ Safety Features Ratings NHTSA Front Impact: 4-star driver, 4-star passenger (as per NHTSA 2004 data) IIHS Side Impact: Acceptable (as per IIHS 2004 data) Active Features ABS: Standard Anti-lock Braking System (ABS) AWD: Symmetrical All-Wheel Drive with DCCD Passive Features Airbags: Driver and front passenger airbags, side airbags (market dependent) Seatbelts: 3-point height-adjustable front seatbelts with pretensioners and load limiters Rollover Protection: Reinforced chassis structure 💡 Technology Features Infotainment Audio System: Factory radio with CD player, AM/FM tuner, and speakers. Aftermarket head unit upgrades are common. Instrumentation: Performance-oriented instrument cluster with boost gauge, tachometer, speedometer, and auxiliary gauges. Driver Assistance Traction Control: Standard stability and traction control systems (VDC - Vehicle Dynamics Control) that work in conjunction with the AWD system. Connectivity Standard Features: Limited by 2004 standards, typically no factory Bluetooth or advanced connectivity features. Aux input for audio devices may be present on some models. 🔧 Maintenance Service Intervals...