🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2011 Codes Chassis Code: GE/GH/GR/GV Engine Code: EJ257 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback Target Audience: Enthusiasts, rally fans, performance-oriented drivers Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Ford Focus RS Key Features Performance: Symmetrical All-Wheel Drive, turbocharged engine, performance-tuned suspension Rally Heritage: Direct lineage from Subaru's WRC success Driver Engagement: Focus on handling, steering feel, and driver feedback 📋 Manual Details Coverage Areas Primary Coverage: Complete Service and Repair Diagnostic Coverage: Extensive diagnostics and troubleshooting Page Count Estimated Pages: 2500+ Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Powertrain: Engine, Transmission, Drivetrain, Exhaust Chassis: Suspension, Steering, Brakes, Wheels, Tires Body: Body Panels, Interior Trim, Exterior Trim, Doors, Glass Electrical: Power Distribution, Lighting, Instrumentation, HVAC Electrical, Audio Systems, ECU/ECM Comfort And Convenience: HVAC, Seats, Power Accessories, Security System Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks, tune-ups Major Repairs: Engine rebuilds, transmission overhauls, brake system repairs, suspension component replacement Diagnostics: Symptom-based troubleshooting, diagnostic trouble codes (DTCs), wiring diagrams Adjustments: Wheel alignment, clutch adjustment, parking brake adjustment Specifications And Data: Torque values, clearances, fluid capacities, electrical specifications Technical Depth Depth: Comprehensive, suitable for professional technicians and advanced DIY enthusiasts 📊 Manual Specifications File Format Searchability: Fully searchable text Printable: Yes, printable pages Print Quality Resolution: High resolution for clear diagrams and text Binding Type Binding: N/A (Digital Format) Paper Type Paper Quality: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Horizontally Opposed (Boxer) Turbocharged DOHC 16-Valve Displacement: 2.5 Liters (2457 cc) Performance Horsepower: 305 hp @ 6000 rpm Torque: 290 lb-ft @ 4000 rpm Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) with Sequential Ignition Recommended Fuel: Premium Unleaded (91 Octane or higher) Lubrication Oil Type: SAE 5W-30 Synthetic Oil Capacity: 5.1 US quarts (4.8 liters) with filter Cooling System Coolant Type: Subaru Super Coolant (Blue) Coolant Capacity: 7.1 US quarts (6.7 liters) 🔧 Transmission Standard Type: 6-speed Manual Transmission (TS6C4GBA) Optional Type: N/A for WRX STI Features Drivetrain: Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) Clutch: Hydraulically actuated, single dry plate Lubrication Manual Transmission Fluid Type: Subaru Manual Transmission Fluid (API GL-5, SAE 75W-90) Manual Transmission Fluid Capacity: 2.0 US quarts (1.9 liters) 📐 Dimensions Exterior Length: 173.8 inches (4415 mm) Width: 70.1 inches (1780 mm) Height: 57.1 inches (1450 mm) Wheelbase: 103.0 inches (2615 mm) Ground Clearance: 5.0 inches (127 mm) Weights Curb Weight: 3373 lbs (1530 kg) Gross Vehicle Weight Rating: 4553 lbs (2065 kg) Cargo Trunk Volume Sedan: 11.6 cu ft (328 L) Trunk Volume Hatchback: 19.1 cu ft (541 L) (with rear seats up) 🛡️ Safety Features Ratings NHTSA Front Impact: 5 Stars NHTSA Side Impact: 5 Stars NHTSA Rollover: 4 Stars Active Features ABS: Yes, 4-wheel disc anti-lock braking system Traction Control: Yes, Active Traction Control (ATC) Electronic Stability: Yes, Vehicle Dynamics Control (VDC) Passive Features Airbags: Driver and front passenger airbags, front side airbags, side curtain airbags Seatbelts: 3-point seatbelts with pretensioners and load limiters, LATCH system Body Structure: Advanced front and side impact protection structures 💡 Technology Features Infotainment Head Unit: Standard AM/FM/CD/MP3 audio system with auxiliary input Speaker System: 6-speaker system Optional Upgrades: Subwoofer, Bluetooth, navigation (dealer-installed options) Driver Assistance Cruise Control: Standard Keyless Entry: Standard Immobilizer: Standard Connectivity Usb Port: Optional (depending on trim and head unit) Bluetooth: Optional (depending on trim and head unit) 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles (6,000 km) or 6 months, whichever comes first (under severe driving conditions) Engine Air Filter Replacement: Every 15,000 miles (24,000 km) Cabin Air Filter Replacement: Every 15,000 miles (24,000 km) Spark Plug Replacement: Every 30,000 miles (48,000 km) Timing Belt Replacement: N/A (Uses timing chain) Fluid Specifications Brake Fluid Type: DOT 3 or DOT 4 Power Steering Fluid Type: Subaru ATF-HP or equivalent DEXRON-III (check manual for specific recommendations) Transfer Case Fluid Type: Subaru Differential Fluid-GX or equivalent API GL-5, SAE 75W-90 Rear Differential Fluid Type: Subaru Differential Fluid-GX or equivalent API GL-5, SAE 75W-90 Known Issues Piston Ring Land Failure: Potential for piston ring land breakage under heavy load or detonation (common in heavily modified engines) Clutch Wear: Can be prone to premature wear with aggressive driving Water Pump Leaks: Occasional leaks from the water pump seal Alternator Failure: Some reports of early alternator failure 📚 Vehicle History Brand Heritage Rally Connection: Subaru's long-standing success in the World Rally Championship (WRC) Model Evolution Generation: Third Generation (2008-2014) - GR/GV (Hatchback/Sedan) Styling Change: Introduction of hatchback body style, revised front-end styling for 2011 facelift Production Manufacturing Location: Ota City, Gunma Prefecture, Japan Production Years Sti Ge Gh Gr Gv: 2008-2014 🏆 Awards & Recognition Recognitions Car And Driver 10Best: The WRX STI has historically...