🏷️ Basic Information Identification Make: Subaru Model: Impreza Year: 2003 Codes Chassis Code: GD, GG Platform: Subaru Global Platform (predecessor) 👋 Introduction Market Position Segment: Compact Car, Rally-Inspired Performance Sedan/Wagon Key Differentiators: Symmetrical All-Wheel Drive, Boxer Engine, Performance Variants (WRX) Competitive Analysis Competitors 2003: Honda Civic Si, Mitsubishi Lancer Evolution (WRX competitor), Toyota Corolla, Ford Focus Key Features Handling Dynamics: Renowned for its sporty handling and road-holding capabilities, especially in adverse weather conditions. Powertrain Layout: Horizontally-opposed (Boxer) engine and Symmetrical All-Wheel Drive offer a low center of gravity and balanced weight distribution. Performance Variants: Availability of the iconic WRX model with turbocharged power and enhanced performance features. 📋 Manual Details Coverage Areas Primary Coverage: North America Secondary Coverage: Global Markets (technical similarity) Page Count Estimated Pages: 1500-2000+ Manual Type Type: Factory Repair Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Full Engine Overhaul, Component Testing, Timing Engine Management: ECU Diagnosis, Sensor Testing, Fuel Injection, Ignition System Transmission Manual: Disassembly, Assembly, Clutch Service, Gearbox Overhaul Transmission Automatic: Service Procedures, Fluid Flushing, Valve Body Diagnosis Drivetrain AWD: All-Wheel Drive System Service, Center Differential, Rear Differential Suspension: Front and Rear Suspension Components, Alignment Specifications, Struts, Bushings Brakes: Hydraulic System, ABS, Brake Pad/Rotor Replacement, Bleeding Procedures Steering: Power Steering System, Steering Column, Tie Rods Electrical System: Wiring Diagrams, Component Location, Fuse/Relay Identification Body And Interior: Body Panel Removal, Interior Trim, Seat Removal, Glass Replacement HVAC: Climate Control System Diagnosis and Repair Comfort Convenience: Power Windows, Door Locks, Remote Keyless Entry Procedures Included Scheduled Maintenance: Detailed Service Intervals and Procedures Troubleshooting: Diagnostic Flowcharts, Symptom-Based Diagnosis Repair And Replacement: Step-by-Step Repair Guides for All Major Components Diagnostics: OBD-II Diagnostics, DTC Code Explanations Torque Specifications: Precise Torque Values for Critical Fasteners Special Tools: Identification and Usage of Subaru Specific Tools Technical Depth Depth: Comprehensive (from basic maintenance to full engine/transmission rebuilds) Audience: Primarily Professional Technicians, but accessible to advanced DIYers 📊 Manual Specifications File Format Format: Searchable PDF Searchability: Full Text Search Capability Print Quality Printability: High-Resolution, Printable Pages Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code Na: EJ253 (2.5L SOHC) Engine Code Turbo: EJ205 (2.0L DOHC Turbocharged - WRX) Performance Na Horsepower: 165 hp @ 5600 rpm (EJ253) Na Torque: 166 lb-ft @ 4000 rpm (EJ253) Turbo Horsepower: 227 hp @ 5600 rpm (EJ205 - WRX) Turbo Torque: 242 lb-ft @ 3000 rpm (EJ205 - WRX) Fuel System Fuel Delivery: Multi-Point Fuel Injection (MPFI) Fuel Type: Unleaded Gasoline (91 Octane Recommended for WRX) Engine Details Bore X Stroke Ej253: 99.5 mm x 79.0 mm Bore X Stroke Ej205: 92.0 mm x 75.0 mm Compression Ratio Ej253: 9.7:1 Compression Ratio Ej205: 8.0:1 🔧 Transmission Standard Transmission Type Na: 5-Speed Manual Transmission Type Wrx: 5-Speed Manual Optional Transmission Type Na: 4-Speed Automatic Features AWD System: Subaru Symmetrical All-Wheel Drive with Viscous Center Coupling Automatic AWD System: Active Torque Split AWD (ATSAWD) on Automatic Transmission Models Fluid Specifications Manual Transmission Fluid: API GL-5, SAE 75W-90 (Subaru Extra-S or equivalent) Automatic Transmission Fluid: Dexron III/Mercon (Subaru ATF-HP recommended) Rear Differential Fluid: API GL-5, SAE 90 (or Subaru Extra-S) 📐 Dimensions Exterior Length: Approx. 173.8 inches (Sedan), 175.7 inches (Wagon) Width: Approx. 68.1 inches Height: Approx. 56.1 inches (Sedan), 58.5 inches (Wagon) Wheelbase: Approx. 103.0 inches Ground Clearance: Approx. 6.1 inches (Standard), 7.1 inches (WRX) Weights Curb Weight: Approx. 3000 - 3300 lbs (depending on trim/drivetrain) Gross Vehicle Weight Rating: Approx. 4200 - 4400 lbs Cargo Cargo Volume Sedan: Approx. 11.7 cubic feet Cargo Volume Wagon: Approx. 29.6 cubic feet (rear seats up) 🛡️ Safety Features Ratings NHTSA Front Impact Driver: Good (2003 Model Year) NHTSA Front Impact Passenger: Good (2003 Model Year) IIHS Front Offset Driver: Acceptable (2003 Model Year) Active Features ABS: Standard on most models, optional on some base trims. Traction Control: Available on certain models, particularly those with automatic transmissions. Passive Features Airbags Front: Driver and Front Passenger Airbags Airbags Side: Optional Front Side Airbags on higher trims. Seatbelts: 3-Point Height-Adjustable Front Seatbelts with Pretensioners 💡 Technology Features Infotainment Audio System: Factory AM/FM/CD player, optional premium audio system (e.g., Clarion). Display: Basic LCD screen for clock and radio information. No integrated navigation. Driver Assistance Cruise Control: Standard on most trims. All Wheel Drive: The cornerstone technology providing enhanced traction and stability. Connectivity Bluetooth: Not factory-equipped. Aftermarket integration is common. Usb: Not factory-equipped. Aftermarket integration is common. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 6 months (severe conditions) or 7,500 miles or 12 months (normal conditions). Engine Air Filter: Replace every 15,000-30,000 miles or as needed based on driving conditions. Cabin Air Filter: Replace every 15,000 miles or 12 months. Spark Plugs: Replace every 60,000-100,000 miles (depending on plug type, iridium recommended for longevity)....