🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2013 Chassis Code: GV Codes Engine Codes: EJ257 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Ford Focus ST, Hyundai Veloster N (later models) Key Features Performance Focus: Symmetrical All-Wheel Drive, turbocharged boxer engine, rally-bred heritage Handling: Performance-tuned suspension, precise steering, strong braking system Durability: Robust EJ257 engine, proven AWD system 📋 Manual Details Coverage Areas Coverage Scope: Comprehensive repair, maintenance, and diagnostic information Page Count Estimated Page Count: 4000+ Manual Type Type: Factory Service Manual / Workshop Manual / Repair Manual Language Language: English Format Format: Digital (likely PDF) 📖 Manual Coverage Systems Covered Engine: 2.5L Turbocharged EJ257 (diagnosis, overhaul, timing belt, cooling, lubrication, fuel injection, ignition, emissions) Transmission: 6-speed Manual Transmission (TY76) - diagnosis, overhaul, clutch, driveline, differentials Drivetrain: All-Wheel Drive (AWD) system, limited-slip differentials (front, center, rear), axle shafts, prop shaft Suspension: Front struts, rear shocks, springs, control arms, anti-roll bars, bushings, alignment specifications Brakes: Front Brembo 4-piston calipers, rear Brembo 2-piston calipers, ABS system, EBD, brake lines, rotors, pads, bleeding procedures Steering: Power assisted rack and pinion, steering column, tie rod ends Electrical: Wiring diagrams, charging system, starting system, lighting, power windows, locks, audio system, body control module (BCM), ECU diagnosis HVAC: Air conditioning system, heater, climate control unit, refrigerant types, diagnosis Body: Body panels, doors, hood, trunk, interior trim, exterior trim, glass, bumpers Chassis: Frame structure, unibody construction, mounting points Procedures Included Maintenance: Oil changes, filter replacements, spark plug replacement, fluid checks and changes, belt inspections Repair: Engine component replacement (turbocharger, injectors, pistons, etc.), transmission overhaul, brake system repair, suspension component replacement Diagnosis: Troubleshooting guides, diagnostic trouble codes (DTCs), fault finding procedures for all major systems Troubleshooting: Step-by-step diagnostic flowcharts for common and complex issues Specifications: Torque specifications for all fasteners, critical clearances, measurements Wiring Diagrams: Detailed electrical schematics for all vehicle systems Technical Depth Depth: Complete overhaul and rebuild procedures, advanced diagnostic techniques, factory-level repair instructions 📊 Manual Specifications File Format File Type: PDF Print Quality Print Readability: High resolution, clear text and diagrams, suitable for printing Binding Type Binding: N/A (Digital format) Paper Type Paper Quality: N/A (Digital format) Searchability Text Search: Likely searchable text within the PDF ⚙️ Engine Specifications Primary Engine Engine Code: EJ257 Configuration: 2.5L DOHC 16-valve turbocharged Boxer-4 Performance Horsepower: 305 hp @ 6000 rpm Torque: 290 lb-ft @ 4000 rpm Bore X Stroke: 99.5 mm x 79.0 mm Compression Ratio: 8.2:1 Fuel System Injection Type: Multi-point fuel injection (MPI) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Turbocharger Turbo Model: IHI VF48 Engine Management ECU: Engine Control Unit (ECU) with immobilizer and diagnostic capabilities 🔧 Transmission Standard Type: 6-speed Manual Transmission (TY76) Optional Type: N/A (STI exclusively manual) Features Clutch Type: Hydraulically operated, twin-plate (early models) / single-plate (later models may vary) AWD Coupling: Driver-controlled center differential (DCCD) Fluid Specifications Manual Transmission Fluid: Subaru Extra-S Gear Oil (or equivalent API GL-5, SAE 75W-90) 📐 Dimensions Exterior Wheelbase: 104.1 inches (2644 mm) Length: 173.8 inches (4415 mm) - Sedan / 173.2 inches (4399 mm) - Hatchback Width: 70.7 inches (1796 mm) Height: 58.1 inches (1476 mm) - Sedan / 58.3 inches (1481 mm) - Hatchback Weights Curb Weight: Approx. 3373 lbs (1530 kg) - Sedan / 3373 lbs (1530 kg) - Hatchback Gross Vehicle Weight Rating: Approx. 4600 lbs (2087 kg) Cargo Trunk Volume: Approx. 11.3 cu ft (Sedan) / N/A (Hatchback, rear seats folded) Wheels Tires Wheel Bolt Pattern: 5x114.3 Standard Wheel Size: 18 x 8.5 inches Standard Tire Size: 245/40R18 🛡️ Safety Features Ratings NHTSA Overall Rating: 4/5 Stars (for 2013 model year general Impreza, specific STI ratings may vary) Active Features ABS: Standard Anti-lock Braking System Ebd: Standard Electronic Brake-force Distribution Vsc: Standard Vehicle Stability Control (VSC), Traction Control System (TCS) Passive Features Airbags: Front, side-impact, and curtain airbags Seatbelts: 3-point seatbelts with pre-tensioners Child Anchors: LATCH (Lower Anchors and Tethers for Children) system 💡 Technology Features Infotainment Head Unit: Base infotainment system with CD player, AM/FM radio, auxiliary input, and optional navigation. Speakers: Standard 6-speaker audio system. Driver Assistance Traction Control: Standard traction control and stability control systems. Dccd: Driver Controlled Center Differential provides manual control over torque distribution. Connectivity Auxiliary Input: Standard 3.5mm auxiliary audio input. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 3.75 months (severe conditions) / 7,500 miles or 7.5 months (normal conditions). Check manual for specific details. Timing Belt Replacement: 105,000 miles or 105 months (for EJ257, verify with manual) Spark Plug Replacement: Every 30,000 miles (NGK Iridium) / 60,000 miles (NGK Long Life Iridium, check manual) Fluid Specifications Engine Oil Type: 5W-30 (synthetic recommended, e.g., Motul, Pennzoil Ultra Platinum, Valvoline SynPower) Engine Oil Capacity: 5.1 US quarts (4.8 L) with filter Coolant Type: Subaru...