🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Model Year: 2007 Codes Chassis Code: GDB (specific variant for STI) Engine Code: EJ257 👋 Introduction Market Position Segment: Performance Compact / Rally-bred Sedan Target Audience: Enthusiasts, performance car owners, mechanics specializing in Subaru vehicles. Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Subaru WRX (non-STI variants), Ford Focus RS, Volkswagen Golf R. Key Features Vehicle Drivetrain: Symmetrical All-Wheel Drive (AWD) with DCCD. Engine: 2.5L turbocharged Boxer engine (EJ257). Performance Tuning: Designed for high-performance driving and motorsport applications. Key Features Manual Completeness: Considered the definitive guide for the 2007 WRX STI. Usability: Organized for efficient diagnosis and repair, essential for DIY mechanics and professional workshops. 📋 Manual Details Coverage Areas Coverage Scope: Complete service and repair for all models and engines of the 2007 Subaru Impreza WRX STI. Page Count Estimated Pages: Over 1500 Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed overhaul, diagnosis, and repair of the EJ257 engine, including cylinder head, block, pistons, crankshaft, camshafts, timing belt, lubrication system. Engine Performance: Fuel injection system, ignition system, turbocharger system (including intercooler and wastegate), emissions control system (catalytic converter, EGR, EVAP). Transmission Drivetrain: Manual transmission (TY757 series), clutch system, front and rear differentials, DCCD (Driver's Control Centre Differential) operation and service. Suspension Steering: Front and rear suspension components (struts, springs, control arms, sway bars), power steering system, wheel alignment specifications. Brakes: Front and rear brake systems (calipers, rotors, pads, master cylinder, ABS), parking brake system. Electrical Electronics: Starting and charging system, lighting system, instrument cluster, body electrical systems (wipers, horn, windows, locks), ECU and sensor diagnostics. HVAC: Heating, ventilation, and air conditioning system diagnosis and repair. Body Interior: Exterior body panels, interior trim, seats, safety restraint systems (airbags, seatbelts). Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspections. Troubleshooting: Diagnostic procedures for common and uncommon faults, wiring diagrams, DTC (Diagnostic Trouble Code) interpretation. Repair Overhaul: Step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation for all major systems. Diagnostics: Detailed diagnostic flowcharts and procedures for electrical and mechanical issues, including use of Subaru Select Monitor (SSM). Technical Depth Depth: Comprehensive, from basic maintenance to complete engine and transmission rebuilds, including advanced electrical diagnostics and calibration procedures. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text content for quick access to information. Printable: Printable pages for workshop use. Print Quality Image Resolution: High-resolution images and diagrams suitable for clear viewing. Binding Type Binding: N/A (Digital Format) Paper Type Paper Quality: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Name: EJ257 Engine Type: Horizontally-opposed (Boxer), 4-cylinder, turbocharged, intercooled. Displacement: 2457 cc Bore X Stroke: 99.5 mm x 79.0 mm Compression Ratio: 8.0:1 Horsepower Hp: 305 hp @ 6000 rpm Torque Lb Ft: 290 lb-ft @ 4000 rpm Performance Turbocharger Type: Twin-scroll IHI VF39 (or similar) Redline Rpm: 7000 rpm Fuel System Fuel Delivery: Sequential multi-port fuel injection (S-MPFI) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Ignition System: Distributorless ignition system (DIS) with coil-on-plug. 🔧 Transmission Standard Transmission Type: 6-speed manual transmission Features Dccd: Driver's Control Centre Differential (DCCD) with automatic and manual modes. AWD System: Symmetrical All-Wheel Drive (SAWD) with viscous coupling center differential and limited-slip rear differential (mechanical LSD). 📐 Dimensions Exterior Length: 4415 mm (173.8 inches) Width: 1795 mm (70.7 inches) Height: 1445 mm (56.9 inches) Wheelbase: 2625 mm (103.3 inches) Front Track: 1530 mm (60.2 inches) Rear Track: 1530 mm (60.2 inches) Weights Curb Weight: Approx. 1505 kg (3318 lbs) Gross Vehicle Weight Rating: Not specified in provided data, but standard for segment. 🛡️ Safety Features Ratings NHTSA Front Impact: Likely rated 4 stars based on general Subaru safety for the era, specific STI rating may vary. IIHS Moderate Overlap Front: Likely rated 'Good' or 'Acceptable', specific STI rating may vary. Active Features ABS: Standard Anti-lock Braking System (ABS) with Electronic Brake-force Distribution (EBD). Traction Control: Standard Vehicle Dynamics Control (VDC) system. AWD: Symmetrical All-Wheel Drive enhances stability and traction. Passive Features Airbags: Front dual-stage airbags, front side-impact airbags, side curtain airbags. Seatbelts: 3-point height-adjustable front seatbelts with pretensioners and load limiters, rear 3-point seatbelts. Body Structure: Reinforced steel body structure with crumple zones. 💡 Technology Features Infotainment Head Unit: Stock head units typically include AM/FM/CD player, often with premium sound system. Options for navigation may have been available. Speakers: Premium speaker system often included for enhanced audio quality. Driver Assistance Vdc: Vehicle Dynamics Control (VDC) system integrates ABS, traction control, and stability control. AWD Control: DCCD provides advanced control over power distribution between front and rear axles. Connectivity Aux Input: Likely includes an auxiliary audio input for connecting external devices. Cruise Control: Standard cruise control system. 🔧...