🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Model Generation: G3 Model Years Covered: 2012-2014 Body Styles Covered: 4-Door Sedan, 5-Door Hatchback Trim Levels Covered: WRX, WRX-S, STI-S, SE Codes Chassis Code: GR/GV (depending on body style) 👋 Introduction Market Position Vehicle Positioning: The Subaru Impreza WRX STI (G3 generation) is a performance-oriented compact car, renowned for its all-wheel-drive system, turbocharged engine, and rally-bred heritage. It competes in the sport compact segment against vehicles like the Mitsubishi Lancer Evolution. Competitive Analysis Segment Competitors: Mitsubishi Lancer Evolution, Volkswagen Golf R, Ford Focus RS (later years), Honda Civic Type R (later generations) Key Features Performance Focus: The manual provides in-depth information for maintaining and repairing the high-performance components that define the WRX STI, including the engine, AWD system, and chassis. Manual Benefit User Target: Designed for both experienced mechanics and DIY enthusiasts seeking to perform repairs, maintenance, and modifications on their 2012-2014 Subaru Impreza WRX STI. 📋 Manual Details Coverage Areas Primary Coverage: Workshop Service and Repair Page Count Total Pages: > 3300 Manual Type Type: Factory Workshop Service Repair Manual Language Language: English Format Format: Electronic PDF 📖 Manual Coverage Systems Covered Powertrain: Engine Mechanical, Fuel Injection/Fuel Systems, Ignition System, Cooling System, Lubrication System, Exhaust System, Intake/Induction, Turbocharger System, Clutch System, Manual Transmission and Differential, Transfer Case Chassis: Brake System, Parking Brake, Front Suspension, Rear Suspension, Wheel and Tire System, Steering System (Power Assisted), Drivetrain (Drive Shaft System) Electrical Electronics: Starting/Charging System, Lighting System, Instrument Cluster/Driver Information, Airbag System, Immobilizer Diagnostics, Communication System, LAN System Diagnostics, Body Control System Diagnostics, Entertainment System, Cruise Control System, Vehicle Dynamics Control (VDC), Occupant Detection System Diagnostics, Seat Belt System Body Interior: Exterior Body Panels, Exterior/Interior Trim, Glass/Windows/Mirrors, Seats System, HVAC System (Heater, Ventilator, AC), Wiper and Washer Systems, Security and Locks Procedures Included Maintenance: Scheduled Maintenance, Fluid Changes, Filter Replacements, Inspections Diagnostics: Troubleshooting Guides, Diagnostic Trouble Codes (DTCs), Electrical System Diagnosis, Engine Performance Diagnosis Repair: Component Removal and Installation, Reassembly Procedures, Component Overhaul/Rebuild Technical Data: Specifications, Tolerances, Torque Values, Wiring Diagrams Technical Depth Depth: Comprehensive: Covers basic maintenance, routine servicing, advanced diagnostics, component-level repair, and full rebuild procedures. Suitable for professional technicians and skilled DIY enthusiasts. 📊 Manual Specifications File Format File Type: PDF Viewing Requirements: Adobe Acrobat Reader (Free download) Compression: ZIP (Requires WinZip or WinRAR for extraction) Print Quality Printability: All pages are printable Binding Type Binding: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Code: EJ257 Engine Type: 2.5L Turbocharged Flat-4 (Boxer) Engine Configuration: Horizontally Opposed (Boxer), 4-Cylinder Valvetrain: DOHC (Double Overhead Camshaft), 16 Valves Bore X Stroke: 99.5 mm x 79.0 mm (approx.) Compression Ratio: 8.4:1 Performance Horsepower: 305 hp @ 6000 rpm (US Market) Torque: 290 lb-ft @ 4000 rpm (US Market) Fuel System Fuel Delivery: Multi-port Fuel Injection (MPI) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Turbocharger Turbo Type: Twin-Scroll Turbocharger with Intercooler 🔧 Transmission Standard Transmission Type: 6-Speed Manual Transmission (TY85) Optional Optional Transmission: N/A for WRX STI models of this generation Features Drivetrain: Symmetrical All-Wheel Drive (AWD) with Driver Controlled Center Differential (DCCD) Fluid Specifications Manual Transmission Fluid: Subaru Extra-S GL5 75W-90 or equivalent Front Differential Fluid: Subaru Extra-S GL5 75W-90 or equivalent Rear Differential Fluid: Subaru Extra-S GL5 75W-90 or equivalent 📐 Dimensions Exterior Wheelbase: 2650 mm (104.3 in) Length: 4415 mm (173.8 in) - Sedan / 4465 mm (175.8 in) - Hatchback Width: 1795 mm (70.7 in) Height: 1470 mm (57.9 in) - Sedan / 1475 mm (58.1 in) - Hatchback Weights Curb Weight: Approx. 1505 kg (3318 lbs) - Sedan / 1520 kg (3351 lbs) - Hatchback Gross Vehicle Weight Rating: Varies by model and region (Refer to vehicle VIN plate) Wheel Tire Wheel Size: 18 x 8.5 inches (Standard) Tire Size: 245/40R18 (Standard) Bolt Pattern: 5x114.3 mm 🛡️ Safety Features Ratings IIHS Top Safety Pick: Likely rated 'Good' or 'Acceptable' in various crash tests, though specific designations may vary by year and test protocol. Consult IIHS website for precise ratings. Active Features Traction Control: Yes (Advanced Traction Control System) Electronic Stability Control: Vehicle Dynamics Control (VDC) - Subaru's Electronic Stability Control system Braking System: Four-wheel disc brakes with ABS, Electronic Brake-force Distribution (EBD), Brake Assist (BA) AWD System: Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) Passive Features Airbags: Front dual-stage airbags, front side-impact airbags, side-curtain airbags Seat Belts: 3-point height-adjustable front seat belts with pretensioners and load limiters, rear 3-point seat belts Occupant Restraint: Occupant Detection System (for airbag deployment) 💡 Technology Features Infotainment Audio System: Standard AM/FM/CD/MP3 audio system with auxiliary input and available navigation system. Higher trims may feature premium audio systems (e.g., Harman Kardon). Connectivity: Bluetooth hands-free phone and audio streaming available on some trims/options. USB port for media playback. Driver Assistance Cruise Control:...