🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX & STI Year: 2012 Codes Chassis Code: GE/GH/GR/GV Engine Codes: EJ255 (WRX), EJ257 (STI) 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback Target Audience: Enthusiast drivers, tuners, owners seeking detailed DIY repair information. Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Volkswagen GTI, Mazdaspeed3 Key Features Performance Heritage: Renowned for rally heritage, turbocharged Boxer engines, and Symmetrical All-Wheel Drive. Model Variants: WRX (sport-tuned) and STI (motorsport-derived homologation special). 📋 Manual Details Coverage Areas Coverage: Full vehicle service and repair Page Count Estimated Pages: Approx. 2000+ Manual Type Type: Factory Service Manual / Workshop Manual Language Language: English Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered Powertrain: Engine (2.5L Turbo EJ255/EJ257), Transmission (Manual), Drivetrain (AWD) Chassis: Suspension, Steering, Brakes, Wheels & Tires Electrical: Engine Control Module (ECM), Body Control Module (BCM), Lighting, Audio, HVAC, SRS (Airbag), Security System Body: Exterior Body Panels, Interior Trim, Glass, Doors, Seats Procedures Included Maintenance: Scheduled maintenance, fluid changes, filter replacements, inspections Diagnostics: Troubleshooting guides, diagnostic trouble codes (DTCs), wiring diagrams, component testing Repair: Engine overhaul, transmission rebuild, brake caliper replacement, suspension component renewal, electrical component repair Installation: Component replacement, accessory installation (where applicable) Technical Depth Depth: Comprehensive: From basic fluid checks to full engine and transmission rebuilds, including detailed electrical schematics and diagnostic procedures. 📊 Manual Specifications File Format Format Details: Searchable PDF with hyperlinked sections for easy navigation. Print Quality Quality: High-resolution images, clear text, professional layout. Binding Type Type: N/A (Digital Download) Paper Type Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Wrx Type: 2.5L Turbocharged Boxer-4 (EJ255) Horsepower Hp Wrx: 265 hp @ 6000 rpm Torque Lb Ft Wrx: 244 lb-ft @ 2000 rpm Primary Engine Sti Type: 2.5L Turbocharged Boxer-4 (EJ257) Horsepower Hp Sti: 305 hp @ 6000 rpm Torque Lb Ft Sti: 290 lb-ft @ 4000 rpm Fuel System Type: Sequential Multi-Port Fuel Injection (MPI) Fuel Requirement: Premium Unleaded Gasoline (91 Octane or higher recommended) Engine Management ECU: Engine Control Unit (ECU) with advanced tuning capabilities. 🔧 Transmission Standard Transmission Type: 6-Speed Manual Transmission Optional Transmission Type: N/A (Manual transmission only for these performance variants) Drivetrain System: Symmetrical All-Wheel Drive (AWD) with Driver Controlled Center Differential (DCCD) on STI Clutch Type: Hydraulic Actuated, Single Dry Plate Clutch 📐 Dimensions Exterior Sedan Length In: 179.7 inches Width In: 70.7 inches Height In: 58.1 inches Exterior Hatchback Length In: 173.8 inches Width In: 70.7 inches Height In: 58.1 inches Wheelbase In Wheelbase: 103.2 inches Weights Curb Weight Lbs: 3200-3400 lbs (approx., depending on trim/body style) 🛡️ Safety Features Ratings NHTSA Overall Rating: 5-Star (for the standard Impreza platform, specific WRX/STI ratings may vary slightly) Active Features ABS: Anti-lock Braking System (ABS) Esc: Electronic Stability Control (VDC - Vehicle Dynamics Control) Traction Control: Traction Control System (TCS) Passive Features Airbags: Front, Side Curtain, and Knee Airbags Structure: Advanced front and side-impact energy-absorbing structure 💡 Technology Features Infotainment System Features: Base audio system with CD player, MP3 capability, and auxiliary input. Optional navigation system available on some trims. Driver Assistance Features: ABS, VDC, TCS, standard cruise control. Connectivity Ports: Auxiliary audio input jack. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 3 months (severe use) / 7,500 miles or 6 months (normal use) Air Filter Interval: Inspect every 15,000 miles, replace as needed. Spark Plug Interval: Approx. 30,000-60,000 miles (depending on plug type, Irridium recommended) Timing Belt Interval: N/A (Subaru EJ25 engines utilize a timing chain system, which generally does not require periodic replacement unless worn.) Fluid Specifications Engine Oil: SAE 5W-30, API SG or higher (check manual for specific certifications, synthetic recommended for performance) Coolant: Subaru Super Coolant (Blue) or equivalent (50/50 mix with distilled water) Transmission Fluid: API GL-4 or GL-5, 75W-90 (manual transmission) Differential Fluid Front: API GL-5, 75W-90 Differential Fluid Rear: API GL-5, 75W-90 (limited-slip differentials may have specific additives or oil types, check manual) Known Issues Engine Wear: Ring land failures ( EJ25 engines), head gasket leaks (less common in later models but still possible), oil consumption. Transmission Issues: Clutch wear, especially with aggressive driving. Gear grinding can occur if fluid is neglected. Suspension: Strut failure, bushing wear common with high mileage and performance driving. Turbocharger: Turbocharger wear and failure can occur due to lack of proper warm-up/cool-down and oil maintenance. 📚 Vehicle History Brand Heritage Heritage: Subaru's deep roots in rally racing and motorsport, leading to the development of performance-oriented models. Model Evolution Third Generation: This 2012 model is part of the third generation (GE/GH/GR/GV) Impreza, which introduced a more mainstream design and the WRX/STI continued on a shared platform with the standard Impreza, unlike previous generations which had unique bodies. Production Production Period: 2007-2014 (Third Generation platform) Manufacturing Location: Japan 🏆 Awards & Recognition Recognitions Automotive Journalism: Consistently praised by automotive media for its...