🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2015 Codes Chassis Code: GVB/GRF (Hatchback), VAB (Sedan) Engine Code: EJ257 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback Niche: Motorsport-derived homologation special, rally-bred performance Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Ford Focus RS Key Features Powertrain Philosophy: Symmetrical All-Wheel Drive (AWD) and turbocharged Boxer engine Performance Focus: Driver engagement, handling dynamics, acceleration 📋 Manual Details Coverage Areas Primary Coverage: North America (USDM/CDN) and European markets Secondary Coverage: JDM (Japan Domestic Market) specifications may differ, but fundamental principles apply. Page Count Estimated Pages: 2000+ Manual Type Type: Factory Authorized Workshop Service Repair Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Powertrain: Engine Mechanical, Engine Control (ECU), Fuel System, Ignition System, Exhaust System, Drivetrain (Manual & Automatic Transmissions), Transfer Case, Differentials (Front, Center, Rear) Chassis: Suspension (Front & Rear), Steering System, Brake System (ABS, EBD), Wheels & Tires Electrical: Body Control Module (BCM), Powertrain Control Module (PCM), Infotainment System, Lighting System, HVAC Control, SRS (Airbag) System, Power Accessories (Windows, Locks, Mirrors), Instrumentation and Gauges, Diagnostics (OBD-II) Body: Body Structure, Exterior Panels, Interior Trim, Seats, Doors, Hood, Trunk/Tailgate Procedures Included Maintenance: Scheduled Maintenance, Oil Changes, Filter Replacements, Spark Plug Replacement, Coolant Service, Brake Fluid Flush, Transmission Fluid Change Repair: Engine Rebuilds, Transmission Overhaul, Clutch Replacement, Brake Component Replacement, Suspension Component Replacement, Electrical Component Diagnosis and Repair, Body Panel Repair Troubleshooting: Diagnostic Trouble Codes (DTCs), Symptom-Based Troubleshooting Guides, Wiring Diagrams for Electrical Fault Finding Diagnostics: OBD-II Scan Tool Procedures, Live Data Interpretation, Actuator Testing, Sensor Data Analysis Technical Depth Depth: Comprehensive from basic fluid checks and filter changes to full engine and transmission overhauls, including detailed electrical troubleshooting and bodywork repair. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text for quick information retrieval Print Quality Printability: Printable pages for offline use and workshop convenience Binding Type Binding: N/A (Digital) Paper Type Paper Quality: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Type: Horizontally-opposed (Boxer), turbocharged, intercooled, DOHC, 16-valve Displacement: 2.5 Liters (2457 cc) Performance Horsepower: 305 hp @ 6000 rpm (approx.) Torque: 290 lb-ft @ 4000 rpm (approx.) Fuel System Injection Type: Multi-point Fuel Injection (MPI) with Sequential Port Injection Fuel Type: Premium Unleaded Gasoline (91 Octane or higher recommended) Engine Management ECU Type: Subaru Select Monitor (SSM) III compatible Emissions Standard: Meets EPA Tier 2 Bin 5 and CARB LEV-II ULEV standards 🔧 Transmission Standard Type: 6-Speed Manual Transmission (TY89 Series) Optional Type: N/A for WRX STI (Manual only) Features Dccd: Driver Controlled Center Differential (DCCD) Drivetrain AWD System: Symmetrical All-Wheel Drive with Active Torque Distribution Front Differential: Helical limited-slip differential Rear Differential: Driver-controlled differential lock (for specific models/tuning) 📐 Dimensions Exterior Length: 4635 mm (182.5 in) for Sedan / 4415 mm (173.8 in) for Hatchback Width: 1795 mm (70.7 in) Height: 1470 mm (57.9 in) for Sedan / 1475 mm (58.1 in) for Hatchback Wheelbase: 2650 mm (104.3 in) Weights Curb Weight: 1500 - 1550 kg (3307 - 3417 lbs) depending on body style Gross Vehicle Weight Rating: Approx. 1980 kg (4365 lbs) Cargo Trunk Volume: Sedan: 12.3 cu ft / Hatchback: 14.3 cu ft (expandable) 🛡️ Safety Features Ratings NHTSA Overall Rating: 5-Star (for models equipped with specific safety packages) IIHS Top Safety Pick: Yes (for models with specific front crash prevention features) Active Features ABS: Anti-lock Braking System with Electronic Brake-force Distribution (EBD) Traction Control: Vehicle Dynamics Control (VDC) with Track Mode AWD Control: Symmetrical AWD, DCCD, Vehicle Dynamics Control Passive Features Airbags: Front, Side-Curtain, Driver's Knee Airbags Seatbelts: 3-point ELR Seatbelts with Pretensioners and Force Limiters Child Seat Anchors: LATCH (Lower Anchors and Tethers for CHildren) 💡 Technology Features Infotainment Head Unit: Subaru Starlink 6.2-inch Touchscreen Infotainment System Audio System: 9-speaker Harman Kardon® premium audio system (optional) Driver Assistance Cruise Control: Standard cruise control Rearview Camera: Standard rearview camera Eyesight System: Subaru's EyeSight® Driver Assist Technology (optional, includes Adaptive Cruise Control, Pre-Collision Braking, Lane Departure Warning, etc.) Connectivity Bluetooth: Bluetooth® hands-free connectivity and audio streaming Usb Ports: USB port for media playback and device charging 🔧 Maintenance Service Intervals Oil Change: Every 3,750 miles or 3 months (severe driving) / 7,500 miles or 6 months (normal driving) Engine Air Filter: Inspect every 7,500 miles, replace as needed Cabin Air Filter: Replace every 15,000 miles or 12 months Spark Plugs: Replace at 60,000 miles (Iridium type) Fluid Specifications Engine Oil: SAE 5W-30, API SN or ILSAC GF-5 certified synthetic oil. Subaru Genuine SAE 0W-20 engine oil is also approved. Coolant: Subaru Super Coolant (Blue) or equivalent; 50/50 mix with distilled water Transmission Fluid: Subaru Extra S Gear Oil (GL-5, 75W-90) for manual transmission Differential Fluid: Subaru Extra S Gear Oil (GL-5, 75W-90) for front and rear differentials Brake Fluid: DOT 3 or DOT 4 brake fluid Known...