🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Generation: G3 Model Years: 2012-2014 Codes Chassis Codes: GR (Hatchback), GE (Sedan - though typically GR/GV for WRX/STI) Engine Codes: EJ257 (STI), EJ255 (WRX - slightly detuned) 👋 Introduction Market Position Vehicle Segment: Compact Sport Sedan/Hatchback (Performance Variant) Target Audience: Enthusiasts, performance drivers, owners seeking in-depth maintenance and repair knowledge. Competitive Analysis Key Competitors: Mitsubishi Lancer Evolution, Ford Focus RS (later models), Volkswagen Golf R Key Features Performance Orientation: Designed for the high-performance WRX and WRX STI variants, known for their turbocharged engines and Symmetrical All-Wheel Drive. Technical Accuracy: Official factory data ensures accuracy for all repair and maintenance procedures. Utility: Essential tool for DIY mechanics, performance tuners, and professional workshops. 📋 Manual Details Coverage Areas Applicable Body Styles: 4-Door Sedan (WRX, WRX-S, STI-S, SE), 5-Door Hatchback (WRX, STI, SE) Covered Engine Variants: 2.5L Turbo 4-Cylinder DOHC, 2.5L High Power Turbo 4-Cylinder DOHC (STI) Page Count Total Pages: 3300+ Manual Type Type: Factory Workshop Service Repair Manual Language Language: English Format Format: PDF (Download) Features Print Capability: Fully printable (selected pages or whole manual) Illustrations: Illustrated with detailed step-by-step procedures, exploded views Searchability: Likely searchable text within PDF (standard for factory manuals) 📖 Manual Coverage Systems Covered Powertrain: Engine Mechanical, Fuel Injection Fuel Systems, Lubrication System, Cooling System, Ignition System, Exhaust System, Intake Induction, Turbocharger System, Clutch System, Manual Transmission, Differentials (Front, Center, Rear), Transfer Case, Parking Brake Chassis: Brake System, Front Suspension, Rear Suspension, Wheel and Tire System, Power Assisted System (Power Steering) Electrical And Electronics: Airbag System, Auto Headlight Beam Leveler System, Body Control System, Communication System, Cruise Control System, Engine Diagnostic System, Entertainment System, HVAC System, Ignition System, Immobilizer Diagnostics, Instrumentation and Driver Info, LAN System, Lighting System, Occupant Detection System, Starting Charging System, Security and Locks, Speed Control System, Transmission Control System, Vehicle Dynamics Control (VDC), Wiper and Washer Systems, Wiring Diagrams Body And Interior: Exterior Body Panels, Exterior Interior Trim, Glass Windows Mirrors, Seats System, Seat Belt System Procedures Included Maintenance: Scheduled maintenance, fluid changes, filter replacements, inspections Diagnostics: Troubleshooting guides, fault code interpretation, diagnostic procedures for all major systems Repair: Step-by-step instructions for component removal, installation, and repair for all systems Rebuild: Detailed procedures for engine, transmission, and differential rebuilds Specifications: Torque specifications, clearances, fluid capacities, electrical values Technical Depth Depth: Comprehensive: Covers everything from basic maintenance and troubleshooting to full engine and transmission rebuilds. Equivalent to what Subaru dealership technicians use. 📊 Manual Specifications File Format Type: Portable Document Format (PDF) Print Quality Resolution And Clarity: High quality, suitable for printing, with clear text and sharp diagrams. Binding Type Format When Printed: If printed, typically spiral-bound or comb-bound for lay-flat usability. Paper Type Ideal Paper For Printing: Standard copier paper or matte photo paper for best clarity of diagrams. ⚙️ Engine Specifications Primary Engine Engine Type: Horizontally-opposed (Boxer) 4-Cylinder, turbocharged, DOHC Displacement: 2.5 Liters (2457 cc) Bore X Stroke: 99.5 mm x 79.0 mm Compression Ratio: 8.2:1 (STI), 9.0:1 (WRX - typically) Performance Horsepower Wrx: Approx. 265 hp @ 6000 rpm Torque Wrx: Approx. 244 lb-ft @ 2000 rpm Horsepower Sti: Approx. 305 hp @ 6000 rpm Torque Sti: Approx. 290 lb-ft @ 4000 rpm Fuel System Fuel Delivery: Multi-point Fuel Injection (Sequential) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended/required) Engine Management ECU: Engine Control Unit (ECU) with advanced tuning capabilities (especially in STI) Cooling Cooling System Type: Pressurized liquid-cooled system Lubrication Oil Capacity: Approx. 5.1 US quarts (4.8 liters) with filter change (refer to manual for exact specification) Recommended Oil Viscosity: 0W-30 or 5W-30 Synthetic (refer to manual for precise grade based on climate) 🔧 Transmission Standard Type: 6-Speed Manual Transmission (STi), 5-Speed Manual Transmission (WRX - some markets/earlier G3, but most 2012-2014 WRX used 5-speed, manual is primary) Optional Type: No automatic transmission offered for WRX/STI models of this era. Features Sti AWD System: Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) on STI models. Wrx AWD System: Symmetrical All-Wheel Drive with Viscous Coupling Limited Slip Center Differential (VLSD) on WRX models. Fluid Specifications Manual Transmission Fluid: Subaru Extra-S Gear Oil (or equivalent 75W-90 GL-5 API rated synthetic gear oil - consult manual for exact Subaru specification) Fluid Capacity Manual Transmission Capacity: Approx. 2.2 - 2.5 Liters (depending on model/transmission variant - refer to manual) 📐 Dimensions Exterior Length Sedan: Approx. 4580 mm (180.3 in) Length Hatchback: Approx. 4415 mm (173.8 in) Width: Approx. 1795 mm (70.7 in) Height Sedan: Approx. 1470 mm (57.9 in) Height Hatchback: Approx. 1475 mm (58.1 in) Wheelbase: Approx. 2650 mm (104.3 in) Wheels And Tires Standard Wheel Size: 17-inch (WRX), 18-inch (STI) Standard Tire Size: 225/45R17 (WRX), 245/40R18 (STI) Bolt Pattern: 5x100 mm Weights Curb Weight: Approx. 1500-1550 kg (3300-3417 lbs) depending on trim and body style. 🛡️ Safety Features Ratings...