🏷️ Basic Information Identification Make: Subaru Model: Impreza Year: 2004 Codes Chassis Code: GDB (WRX/STI), GD (non-WRX) Generation Generation: Second Generation (GD/GG) 👋 Introduction Market Position Segment: Compact Sports Sedan/Wagon Target Audience: Enthusiasts, DIY mechanics, Subaru owners seeking to perform their own maintenance and repairs. Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Honda Civic Si, Mazda3 MPS, Volkswagen Golf GTI Key Features All Wheel Drive: Symmetrical All-Wheel Drive (standard on most trims) Performance Variants: Availability of high-performance WRX and STI models with turbocharged engines and enhanced chassis components. Practicality: Available in sedan and wagon body styles, offering practicality alongside performance. 📋 Manual Details Coverage Areas Primary Coverage: All service and repair procedures for the 2004 Subaru Impreza Secondary Coverage: Routine maintenance, diagnostics, troubleshooting, component removal/installation, specifications, wiring diagrams, bodywork, interior/exterior components Page Count Estimated Page Count: Varies based on specific engine/trim, but comprehensive manuals typically range from 1500-3000+ pages for this generation. Manual Type Type: Repair Manual / Service Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Powertrain: Engine, Engine Lubrication, Cooling, Fuel System, Emissions Control, Ignition System, Intake and Exhaust Systems, Turbocharger (if applicable) Drivetrain: Manual Transmission, Automatic Transmission, Clutch System, Differential, Driveshaft, Axles, AWD System Chassis: Steering System, Suspension System (Front and Rear), Brakes (including ABS), Wheels and Tires Electrical: Body Electrical System, Powertrain Control Module (PCM), Engine Control, Lighting, Instrumentation, Audio System, Power Accessories, Supplemental Restraint System (SRS) Body And Interior: Body Panels, Doors, Windows, Seats, Interior Trim, HVAC System, Climate Control, Body Sealing Procedures Included Routine Maintenance: Oil and filter changes, air filter replacement, cabin air filter replacement, spark plug replacement, fluid level checks and top-offs (coolant, brake fluid, power steering fluid, transmission fluid, differential fluid) Tune Up And Engine Repair: Valve adjustment, timing belt/chain inspection and replacement (depending on engine variant), cylinder head removal/installation, piston and ring service, crankshaft and bearing service, complete engine rebuilding Transmission And Drivetrain Repair: Clutch replacement, manual transmission internal repair, automatic transmission overhaul, differential service and repair, driveshaft and CV joint replacement Suspension And Steering Repair: Shock absorber and strut replacement, control arm service, ball joint replacement, tie rod end replacement, power steering pump and rack and pinion service Brake System Service: Brake pad and rotor replacement, brake caliper service, brake fluid bleeding, ABS system diagnostics and repair Electrical Diagnostics: Troubleshooting electrical faults using wiring diagrams, component testing (sensors, actuators, modules), SRS system diagnostics and repair Body And Trim Repair: Door panel removal, seat removal, bumper repair/replacement, interior trim panel replacement Technical Depth Depth: Comprehensive, covering basic maintenance to complete engine and transmission rebuilds, including detailed diagnostic procedures and troubleshooting trees. Illustrations: Detailed step-by-step instructions with diagrams and photographic illustrations for clarity. Special Tools: Identification of required special tools for specific repair procedures. Troubleshooting: Inclusion of diagnostic trouble codes (DTCs), symptom-based troubleshooting guides, and repair procedures for common issues. 📊 Manual Specifications File Format File Type: PDF Print Quality Quality: High-resolution, allowing for clear printing of specific pages. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) - User can print on desired paper. ⚙️ Engine Specifications Primary Engine Engine Code Non Turbo: EJ253 (2.5L SOHC Boxer), EJ20 (various versions, e.g., EJ205 for WRX) Engine Code Turbocharged: EJ205 (2.0L Turbocharged Boxer for WRX), EJ257 (2.5L Turbocharged Boxer for STI) Performance 2 5I Displacement 2 5I: 2.5 Liters (2457 cc) Horsepower 2 5I: Approx. 173 hp @ 5600 rpm Torque 2 5I: Approx. 166 lb-ft @ 4000 rpm Performance Wrx Displacement Wrx: 2.0 Liters (1994 cc) Horsepower Wrx: Approx. 227 hp @ 6000 rpm Torque Wrx: Approx. 217 lb-ft @ 4000 rpm Performance Sti Displacement Sti: 2.5 Liters (2457 cc) Horsepower Sti: Approx. 300 hp @ 6000 rpm Torque Sti: Approx. 300 lb-ft @ 4000 rpm Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) Recommended Fuel: Unleaded gasoline (87 octane for non-turbo, 91+ octane for WRX/STI) 🔧 Transmission Standard Standard Transmission: 5-Speed Manual Transmission Optional Optional Transmission: 4-Speed Automatic Transmission (typically for non-turbo models) Features Manual Clutch Type: Hydraulic Clutch System Features Awd AWD System: Symmetrical All-Wheel Drive with various torque split configurations depending on transmission and trim (e.g., viscous center differential, electronically controlled center differential for STI). 📐 Dimensions Exterior Sedan Length: Approx. 4415 mm (173.8 in) Width: Approx. 1740 mm (68.5 in) Height: Approx. 1410 mm (55.5 in) Exterior Wagon Length: Approx. 4465 mm (175.8 in) Width: Approx. 1740 mm (68.5 in) Height: Approx. 1445 mm (56.9 in) Weights Curb Weight: Varies by trim and body style, typically ranging from 2900 to 3400 lbs. Wheelbase: 2535 mm (99.8 in) Track Width Front: Approx. 1480 mm (58.3 in) Track Width Rear: Approx. 1475 mm (58.1 in) Dimensions Sti Ground Clearance Sti: Approx. 135 mm (5.3 in) (Lowered for performance) 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star (for driver and passenger) NHTSA...