🏷️ Basic Information Identification Make: Subaru Model: Impreza Year: 2007 Model Variant: STI Engine Codes Covered: H4SO, H4DOTC 👋 Introduction Market Position Market Segment: Performance Compact Sedan/Wagon, rally-inspired AWD vehicle Competitive Analysis Key Competitors: Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Mazdaspeed3 Key Features Drivetrain: Symmetrical All-Wheel Drive (AWD) Engine Type: Horizontally-opposed (Boxer) engines Performance Orientation: STI model signifies enhanced performance with turbocharged engine, sport-tuned suspension, and upgraded brakes. 📋 Manual Details Coverage Areas Systems Covered: Engine (STI, H4SO, H4DOTC), Transmission, Chassis, Body, Wiring Page Count Page Count: Likely extensive, typical for factory service manuals (estimate 1500-3000+ pages) Manual Type Manual Type: Factory Service Workshop Repair Manual Language Language: English (standard for Subaru factory manuals) Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed diagnosis, repair, and overhaul procedures for H4SO (Naturally Aspirated) and H4DOTC (Turbocharged) boxer engines including timing belt/chain, lubrication, cooling, fuel injection, and emission control systems. Engine Performance: Specific torque specifications, clearances, and diagnostic parameters for optimal engine performance. Transmission Mechanical: Repair and overhaul procedures for manual and automatic transmissions (specific types to be confirmed based on sub-model), including clutch, gearbox, and differential. Chassis Suspension: Detailed information on front and rear suspension systems, including steering, wheel alignment, shock absorbers, springs, and control arms. Chassis Brakes: Brake system diagnostics, repair, and component replacement for ABS, calipers, rotors, pads, and hydraulic lines. Chassis Drivetrain: Information on axles, driveshafts, differentials (front, center, rear), and AWD system operation. Body Exterior: Repair procedures for body panels, bumpers, doors, hood, trunk, and glass replacement. Body Interior: Dashboards, seats, upholstery, trim panels, and accessory installation procedures. Electrical Lighting: Headlights, taillights, interior lighting, and auxiliary lighting system diagnostics and repair. Electrical Power Management: Battery, alternator, starter motor, fuses, and relays troubleshooting and replacement. Electrical Instruments Controls: Instrument cluster, gauges, switches, and control modules diagnostics. Electrical Comfort Convenience: Climate control, power windows, power locks, mirrors, and audio system wiring and diagnostics. Wiring: Comprehensive wiring diagrams, harness routing, connector pinouts, and electrical component locations. Procedures Included General Maintenance: Oil changes, filter replacements, fluid checks and top-offs, tire rotation, and general inspection procedures. Engine Repair: Engine assembly/disassembly, piston and ring replacement, cylinder head service, valve adjustment, camshaft replacement, and turbocharger servicing. Transmission Repair: Transmission fluid changes, clutch replacement, internal transmission component repair, and driveshaft/CV joint service. Brake System Repair: Brake pad and rotor replacement, brake caliper service, bleeding brake lines, and ABS sensor diagnostics. Suspension Steering Repair: Strut and shock absorber replacement, ball joint and tie rod end replacement, power steering pump and rack repair. Electrical Troubleshooting: Systematic diagnostic procedures for electrical faults, including use of multimeters and scan tools. Body Repair: Panel alignment, dent repair, welding, and sealant application for bodywork. Heating Cooling Repair: HVAC system diagnostics, blower motor replacement, heater core service, and A/C system recharge. Diagnostic Troubleshooting: Fault code interpretation, symptom-based troubleshooting guides, and diagnostic flowcharts. Technical Depth Depth: Comprehensive from basic maintenance to complete engine/transmission rebuilds and advanced electrical system diagnostics. Diagnostic Tools: Information on using Subaru Select Monitor (SSM) or equivalent OBD-II scan tools. Special Tools: Lists and descriptions of required special tools for specific repair procedures. 📊 Manual Specifications File Format File Format: PDF Searchable Text: Likely to have searchable text if professionally created PDF Print Quality Print Quality: Typically high resolution, suitable for printing Binding Type Binding Type: N/A (Digital PDF format) Paper Type Paper Type: N/A (Digital PDF format) ⚙️ Engine Specifications Primary Engine Sti Engine Code: EJ257 (H4DOTC) Displacement: 2.5 Liters (2457 cc) Configuration: 4-cylinder, Boxer, Turbocharged, Intercooled Horsepower: Approximately 305 hp @ 6000 rpm Torque: Approximately 290 lb-ft @ 3500 rpm Bore X Stroke: 99.5 mm x 79.0 mm Compression Ratio: 8.4:1 Fuel Induction: Multi-point Fuel Injection (MPI) with Electronic Throttle Control (ETC) Primary Engine H4So Engine Code: EJ253 (H4SO - example, specific variant may differ) Displacement: 2.5 Liters (2457 cc) Configuration: 4-cylinder, Boxer, Naturally Aspirated Horsepower: Approximately 173 hp @ 5600 rpm Torque: Approximately 166 lb-ft @ 4000 rpm Fuel Induction: Multi-point Fuel Injection (MPI) Fuel System Fuel Type: Unleaded Gasoline (Premium for STI) Ignition System: Electronic Ignition (Coil-on-plug for EJ257) 🔧 Transmission Standard Sti Type: 6-speed Manual Transmission (TY757) Drivetrain: Symmetrical All-Wheel Drive (AWD) with Driver Controlled Center Differential (DCCD) Optional Type: 4-speed Automatic Transmission (4EAT - for non-STI models, less common for STI in 2007 but possible depending on region) Drivetrain: All-Wheel Drive (AWD) Features Clutch Type: Hydraulically operated, twin-plate (STI) 📐 Dimensions Exterior Wheelbase: Approx. 103.2 inches (2620 mm) Length: Approx. 173.8 inches (4415 mm) Sedan / 173.0 inches (4395 mm) Wagon Width: Approx. 70.1 inches (1780 mm) Height: Approx. 57.7 inches (1465 mm) Sedan / 58.1 inches (1475 mm) Wagon Weights Curb Weight Sti: Approx. 3373 lbs (1530 kg) Gross Vehicle Weight Rating: Varies by model and trim Towing Capacity: Not typically specified/recommended for performance models 🛡️ Safety Features Ratings NHTSA...