🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2013 Codes Chassis Code: GV/GR (Hatchback), GE/GH (Sedan - though WRX STI for 2013 is primarily hatch GR) Engine Code: EJ257 👋 Introduction Market Position Vehicle Segment: Compact Sport Sedan/Hatchback, Rally-Inspired Performance Vehicle. Competitive Analysis Key Competitors 2013: Mitsubishi Lancer Evolution, Subaru WRX (non-STI), Ford Focus RS (international market), Volkswagen Golf GTI. Key Features Performance Focus: Engineered for high performance with a turbocharged Boxer engine, Symmetrical All-Wheel Drive, and advanced handling systems. Rally Heritage: Direct lineage from Subaru's successful World Rally Championship (WRC) campaigns. 📋 Manual Details Coverage Areas Language: English Format: Digital (Likely PDF) Manual Type: Workshop Service Repair Manual Page Count Estimated Page Count: 1500+ 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed disassembly, inspection, assembly, and repair of the EJ257 engine, including timing belt, cylinder heads, pistons, crankshaft, oil system, and cooling system. Engine Electrical: Ignition system, fuel injection system, engine control unit (ECU) diagnostics, sensors, actuators, and wiring diagrams. Transmission Manual: DCCD (Driver Controlled Center Differential) operation, maintenance, and repair of the 6-speed manual transmission. Transmission Automatic: Not applicable for WRX STI model. Drivetrain: All-Wheel Drive (AWD) system, front and rear differentials, driveshafts, and hub assemblies. Suspension: Front and rear suspension components, struts, springs, control arms, bushings, and alignment procedures. Brakes: Brake system components (calipers, rotors, pads, lines), ABS (Anti-lock Braking System), and EBD (Electronic Brake-force Distribution). Steering: Power steering system, steering rack, and steering column. Electrical System: Battery, alternator, starter, lighting system, interior electronics, power accessories, and fuse/relay locations. Body Exterior: Body panels, doors, hoods, bumpers, spoilers, glass, and trim. Body Interior: Seats, dashboard, door panels, headliner, HVAC system, and interior trim. HVAC: Heating, Ventilation, and Air Conditioning (HVAC) system components, diagnostics, and service. Diagnostics Troubleshooting: Diagnostic Trouble Codes (DTCs), symptom-based troubleshooting charts, and diagnostic procedures. Fuel System: Fuel pump, injectors, fuel pressure regulator, fuel tank, and emissions control systems. Exhaust System: Exhaust manifold, catalytic converter, muffler, and related components. Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug replacement, coolant flushes, and brake fluid changes. Major Repairs: Engine rebuilds, transmission overhauls, suspension upgrades, and brake system servicing. Component Replacement: Detailed instructions for replacing individual components within all major systems. Specifications Tolerances: Torque specifications, clearances, fluid capacities, and dimensional tolerances for all repairs. Wiring Diagrams: Comprehensive electrical system wiring diagrams for all circuits. Diagnostic Trouble Codes: Detailed explanations and troubleshooting steps for all OBD-II Diagnostic Trouble Codes (DTCs). Component Testing: Procedures for testing the functionality of various electrical and mechanical components. Technical Depth Depth Of Coverage: Comprehensive factory-level technical information, suitable for professional technicians and advanced DIY enthusiasts. 📊 Manual Specifications File Format Digital Format: PDF (Portable Document Format), typically searchable and bookmarked. Searchability: Searchable text content for quick information retrieval. Print Quality Illustrations Quality: High-quality, detailed diagrams and illustrations. Binding Type Binding: Not applicable for digital format, but if printed, typically spiral-bound or perfect-bound for durability. Paper Type Paper Quality: Not applicable for digital format, but a printed version would use high-quality, durable paper for workshop use. ⚙️ Engine Specifications Primary Engine Engine Type: 2.5L Turbocharged Subaru Boxer 4-Cylinder (EJ257) Performance Horsepower: 305 hp @ 6,000 rpm Torque: 290 lb-ft @ 4,000 rpm Fuel System Fuel Delivery: Sequential multi-port fuel injection (SFI) Turbocharger: Twin-scroll turbocharger with intercooler Engine Management ECU Type: Subaru Engine Control Module (ECM) 🔧 Transmission Standard Transmission Type: 6-Speed Manual with Driver Controlled Center Differential (DCCD) Optional Optional Transmission: Not available for 2013 WRX STI. Features Dccd Operation: Driver-selectable locking modes for the center differential. 📐 Dimensions Exterior Wheelbase: 103.3 inches (2624 mm) Length: 173.8 inches (4415 mm) (Hatchback) Width: 70.1 inches (1780 mm) Height: 58.1 inches (1476 mm) (Hatchback) Weights Curb Weight: Approx. 3,373 lbs (1530 kg) 🛡️ Safety Features Ratings NHTSA Rating: Refer to NHTSA for specific model year ratings. Generally good for the era. Active Features Active Safety: ABS, EBD, Traction Control System (TCS), Vehicle Dynamics Control (VDC). Passive Features Passive Safety: Advanced front airbags, front side-impact airbags, curtain airbags. 💡 Technology Features Infotainment Infotainment System: Basic infotainment system with CD player, auxiliary input, and optional navigation system. Bluetooth connectivity often available. Driver Assistance Driver Assistance Features: Limited compared to modern vehicles; primarily ABS, TCS, and VDC. No advanced driver-assistance systems (ADAS) like adaptive cruise control or lane-keeping assist. Connectivity Connectivity Options: Bluetooth hands-free calling and audio streaming (if equipped). 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 3 months, or 7,500 miles/6 months for synthetic oil (refer to manual for exact recommendation based on driving conditions). Timing Belt Replacement: Every 105,000 miles or 105 months (crucial for EJ257 engine). Fluid Specifications Engine Oil: SAE 0W-30 Full Synthetic (meeting Subaru specifications) Coolant: Subaru Super Coolant (Blue) Transmission Fluid: API GL-4 SAE 75W-90 (for 6MT), Subaru Extra-S or equivalent. Differentials Fluid: API GL-5 SAE...