🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2011 Codes Chassis Code: GV / GR Engine Code: EJ257 👋 Introduction Market Position Vehicle Segment: Performance Compact Sedan/Hatchback Target Audience: Enthusiasts, rally fans, performance-oriented drivers seeking a capable all-wheel-drive vehicle. Competitive Analysis Key Competitors: Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Ford Focus RS. Key Features Performance Focus: Emphasis on turbocharged power, all-wheel-drive grip, and sporty handling. Rally Heritage: Direct lineage from Subaru's successful World Rally Championship campaigns. Dccd System: Driver's Control Center Differential for adjustable front-to-rear torque split. 📋 Manual Details Coverage Areas Systems Covered Summary: Comprehensive repair and overhaul of all major vehicle systems. Page Count Estimated Pages: Approximately 2500-3500 pages (typical for full workshop manuals of this era). Manual Type Manual Type: Workshop Service Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, disassembly, cylinder head, piston, crankshaft, camshaft, timing system, lubrication system, cooling system, engine management. Engine Performance: Turbocharger system, intercooler, fuel injection system, ignition system, emissions control system. Transmission Drivetrain: Manual transmission (6-speed), clutch system, differential, driveshafts, axles, AWD system (DCCD - Driver's Control Center Differential). Suspension: Front suspension (MacPherson strut), rear suspension (double wishbone), springs, dampers, anti-roll bars, alignment specifications. Brakes: Front and rear disc brakes, ABS (Anti-lock Braking System), brake fluid specifications, caliper and rotor replacement, brake bleeding. Steering: Power steering system, steering column, steering rack, tie rod ends. Electrical System: Battery, alternator, starter motor, lighting system, power windows, power locks, wiper system, horn, fuses, relays. Electronics Control Units: ECU (Engine Control Unit), TCM (Transmission Control Module), ABS/VDC control unit, SRS control unit, diagnostic trouble codes (DTCs). Body Exterior: Body panels, doors, hood, trunk, bumpers, glass, trim, corrosion protection. Body Interior Interior Components: Seats, dashboard, center console, door panels, headliner, HVAC system, airbags (SRS). Restraint Systems: SRS airbag system, seatbelts, pre-tensioners. Procedures Included Scheduled Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspections. Engine Overhaul: Complete engine rebuild procedures, component specifications, torque values, assembly sequences. Transmission Repair: Manual transmission disassembly, inspection, repair, and reassembly. Brake System Repair: Disc brake pad replacement, rotor replacement, caliper service, brake line repair, ABS bleeding. Suspension Component Replacement: Shock absorber/strut replacement, ball joint replacement, control arm replacement, wheel bearing replacement. Electrical Troubleshooting: Wiring diagrams, circuit testing procedures, component diagnosis, common electrical faults. Diagnostic Procedures: OBD-II diagnostic scan, DTC interpretation, live data analysis, system-specific troubleshooting trees. Body Panel Repair: Dent repair, panel replacement, welding procedures, seam sealing, corrosion prevention. Air Conditioning Service: Refrigerant handling, system evacuation and recharge, component replacement. Technical Depth Depth Of Coverage: Expert-level detail suitable for professional technicians and advanced DIY enthusiasts. Diagnostic Troubleshooting: Extensive troubleshooting guides with step-by-step procedures based on symptoms and diagnostic codes. Component Specifications: Precise torque specifications, clearances, fluid capacities, and measurement tolerances for all components. Wiring Diagrams: Detailed electrical wiring schematics for all vehicle systems. Special Tools: Identification and usage of Subaru-specific and general automotive special tools required for repairs. 📊 Manual Specifications File Format File Format: PDF (Portable Document Format) Searchability: Typically text-searchable for quick information retrieval. Printability: Printable pages for workshop use. Print Quality Image Resolution: Generally high-resolution images and diagrams suitable for clarity. Binding Type Binding Type: N/A (Digital PDF format) Paper Type Paper Type: N/A (Digital PDF format) ⚙️ Engine Specifications Primary Engine Engine Type: 2.5L Turbocharged Boxer 4-Cylinder Engine Code: EJ257 Performance Horsepower: 305 hp @ 6000 rpm Torque: 290 lb-ft @ 4000 rpm Redline: 7000 rpm Fuel System Fuel Induction: Multi-point Fuel Injection (MPI) with Electronic Throttle Control (ETC) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Turbocharger: IHI VF48 Twin-Scroll Turbocharger Fluid Capacities Engine Oil Capacity: 5.8 US quarts (5.5 Liters) with filter change (check manual for precise capacity). 🔧 Transmission Standard Transmission Type: 6-speed Manual Transmission Optional Transmission Type: N/A (STI models were manual-only). Features Drivetrain: Symmetrical All-Wheel Drive (AWD) with Driver's Control Center Differential (DCCD). Fluid Specifications Manual Transmission Fluid: Subaru Extra-S API GL-5 75W-90 Gear Oil (or equivalent). Fluid Capacities Manual Transmission Capacity: 2.2 US quarts (2.1 Liters) (check manual for precise capacity). 📐 Dimensions Exterior Length: Sedan: 180.9 inches (4595 mm) / Hatchback: 173.8 inches (4415 mm) Width: 70.1 inches (1780 mm) Height: 58.1 inches (1475 mm) Wheelbase: 103.0 inches (2615 mm) Ground Clearance: 5.0 inches (127 mm) Weights Curb Weight: Approximately 3373-3417 lbs (1530-1550 kg) depending on body style. Gross Vehicle Weight Rating Gvwr: Refer to vehicle's VIN plate or manual for exact GVWR. 🛡️ Safety Features Ratings NHTSA Front Crash Rating: 4 Stars (for the Impreza model range of this generation, specific STI rating may vary). IIHS Frontal Offset Rating: Good (for the Impreza model range of this generation). Active Features ABS: Yes (4-wheel Anti-lock Braking System) Traction Control: Yes (Vehicle Dynamics Control - VDC) Electronic Brake Force Distribution: Yes (EBD) Passive...