🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2015 Product Type: Service Repair Manual Codes Chassis Code: VA 👋 Introduction Market Position Positioning: Performance compact sedan, rally-bred heritage Target Audience: Enthusiast drivers, DIY mechanics, performance tuning community Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Volkswagen Golf GTI/R, Ford Focus RS, Honda Civic Type R Key Features Performance Focus: Engineered for performance driving, handling, and power AWD System: Advanced Symmetrical All-Wheel Drive with Driver-Controlled Center Differential (DCCD) Braking System: High-performance Brembo brakes for superior stopping power Suspension Tuning: STI-specific sport-tuned suspension for enhanced road holding 📋 Manual Details Coverage Areas General Coverage: Comprehensive service and repair information Specific Coverage: All mechanical, electrical, chassis, body, and diagnostic systems Page Count Estimated Page Count: Thousands of pages (typical for WSM) Manual Type Type: Factory Workshop Service Manual (WSM) Language Language: English Format Format: Digital Download (likely PDF) 📖 Manual Coverage Systems Covered Engine: 2.5L Turbocharged Boxer Engine (EJ257) Transmission: 6-Speed Manual Transmission (TY85) Drivetrain: Symmetrical All-Wheel Drive (AWD) System Suspension: Front MacPherson Struts, Rear Double Wishbone, STI-specific tuning Brakes: Brembo Performance Braking System (Front 6-piston, Rear 2-piston calipers) Steering: Electric Power Steering (EPS) Electrical: Full Electrical Schematics, ECU Diagnosis, Sensor Functions Body: Body Panel Repair, Interior Trim, Glass Replacement HVAC: Heating, Ventilation, and Air Conditioning System Safety Systems: Airbag Systems, ABS, Traction Control, Stability Control Procedures Included Maintenance: Oil changes, filter replacements, fluid checks and flushes, spark plug replacement Engine Repair: Top-end rebuilds, bottom-end rebuilds, timing belt/chain service, turbocharger diagnostics and repair Transmission Repair: Clutch replacement, gearbox overhaul, driveline component repair Brake Service: Pad and rotor replacement, caliper service, bleeding procedures Suspension Work: Component replacement, alignment procedures, damper and spring service Diagnostics: OBD-II diagnostic codes, fault tracing, component testing Electrical Troubleshooting: Wiring harness repair, component testing, circuit diagnosis Body Repair: Panel alignment, dent repair, rust mitigation Wiring Diagrams: Detailed electrical schematics for all systems Technical Data: Torque specifications, clearances, specifications for all components Technical Depth Depth: Deep, in-depth professional-level repair and diagnostics Coverage Level: Complete rebuilds to minor adjustments 📊 Manual Specifications File Format Format: PDF Searchability: Searchable text content Printability: Printable pages Print Quality Quality: High-resolution images and diagrams Binding Type Binding: N/A (Digital) Paper Type Paper: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Code: EJ257 Engine Type: 2.5L DOHC turbocharged horizontally-opposed (Boxer) 4-cylinder Bore X Stroke: 99.5 mm x 79.0 mm Compression Ratio: 8.2:1 Performance Horsepower: 305 hp @ 6000 rpm Torque: 290 lb-ft @ 4000 rpm Fuel System Fuel Delivery: Sequential multi-port fuel injection with side-feed injectors Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Engine Management ECU Type: Engine Control Unit (ECU) with programmable parameters 🔧 Transmission Standard Transmission Type: 6-Speed Manual Transmission Transmission Code: TY85 Features Dccd: Driver-Controlled Center Differential (DCCD) for adjustable torque split Differentials: Front Helical Limited Slip Differential (LSD), Rear Mechanical Limited Slip Differential (LSD) Fluid Specifications Manual Transmission Fluid: Subaru Extra S API GL-5 75W-90 (or equivalent) 📐 Dimensions Exterior Length: 179.4 inches (4557 mm) Width: 70.5 inches (1791 mm) Height: 57.7 inches (1466 mm) Wheelbase: 103.2 inches (2621 mm) Ground Clearance: 5.0 inches (127 mm) Weights Curb Weight: Approximately 3,373 lbs (1530 kg) Gross Vehicle Weight Rating: 4,520 lbs (2050 kg) Towing Capacity: Not Recommended 🛡️ Safety Features Ratings NHTSA Rating: 5-Star Overall Safety Rating (when equipped with EyeSight) IIHS Rating: Top Safety Pick+ Active Features Traction Control: Subaru Vehicle Dynamics Control (VDC) with Track Mode ABS: 4-wheel Anti-lock Braking System (ABS) Brake Bias: Electronic Brake-force Distribution (EBD) Driver Assistance Options: Optional EyeSight Driver Assist Technology (includes Adaptive Cruise Control, Pre-Collision Braking, Lane Departure Warning) Passive Features Airbags: Advanced front airbags, front side-impact airbags, curtain airbags, driver's knee airbag Seatbelts: 3-point seatbelts with pretensioners and load limiters, LATCH child seat system Body Structure: Ring-shaped reinforcement frame and front crumple zone 💡 Technology Features Infotainment Infotainment System: 7-inch touchscreen infotainment system with smartphone integration (e.g., Apple CarPlay, Android Auto in later models, but check specific build) Audio System: Harman Kardon premium audio system (optional) Driver Assistance Eyesight System: Optional EyeSight suite for enhanced safety and convenience Backup Camera: Standard rearview camera Connectivity Bluetooth: Bluetooth hands-free connectivity Usb Ports: USB charging and data ports Performance Tech Si Drive: SI-DRIVE (Subaru Intelligent Drive) system with Intelligent, Sport, and Sport Sharp modes Driver Modes: Adjustable engine response, steering feel, and AWD behavior 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 6 months (severe driving conditions), 7,500 miles or 12 months (normal conditions) Air Filter Replacement: Every 15,000 miles Cabin Air Filter Replacement: Every 15,000 miles Spark Plug Replacement: Every 30,000 miles (NGK Iridium recommended) Coolant Flush: Every 30,000 miles or 24 months Transmission Fluid Change: Every 30,000 miles (manual transmission) Fluid Specifications Engine Oil Capacity: 5.3 US quarts (5.0 L) with filter (5W-30 synthetic recommended) Coolant Type: Subaru Super...