🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2011 Codes Chassis Code: GR/GV Platform: Subaru Global Platform (modified for performance) 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback Usp: Iconic rally-bred performance, Symmetrical All-Wheel Drive, turbocharged engine, driver-focused cockpit. Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Ford Focus RS (though more niche), Volkswagen Golf GTI (less AWD focus). Key Features Performance Focus: Designed for enthusiasts and motorsport. Emphasizes handling, acceleration, and driver engagement. 📋 Manual Details Coverage Areas General Coverage: Complete service, repair, maintenance, diagnostics, and troubleshooting for all aspects of the 2011 Subaru Impreza WRX STI. Page Count Estimated Pages: 2000+ Manual Type Type: Factory Service Manual / Workshop Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Powertrain: Engine, transmission, drivetrain, exhaust system. Chassis: Suspension, steering, brakes, wheels, tires. Electrical: Engine control, body control, lighting, infotainment, sensors, wiring diagrams. Body And Interior: Body panels, doors, interior trim, seats, climate control, safety restraints. Procedures Included Maintenance: Scheduled maintenance, fluid changes, filter replacements, inspections. Repair: Component removal and installation, system diagnostics, specific repair procedures. Troubleshooting: Diagnostic flowcharts, symptom-based troubleshooting guides, common issue resolution. Technical Depth Depth: Comprehensive, from basic maintenance to in-depth engine and transmission overhauls, electrical system diagnostics, and body repair. 📊 Manual Specifications File Format File Quality: High-resolution, searchable text, clear diagrams and illustrations. Print Quality Printability: Printable pages for workshop use. Binding Type Binding: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Code: EJ257 Engine Type: 2.5L DOHC 16-valve Turbocharged Boxer-4 Performance Horsepower: 305 hp @ 6000 rpm Torque: 290 lb-ft @ 4000 rpm Fuel System Fuel Delivery: Multi-Point Fuel Injection (MPFI) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Engine Management ECU: Denso Engine Control Unit (ECU) Cooling System Coolant Type: Subaru Super Coolant (Blue) or equivalent 🔧 Transmission Standard Transmission Type: 6-Speed Manual Transmission (TS251) Optional Optional Transmission: N/A for WRX STI in 2011 Features Drivetrain: Symmetrical All-Wheel Drive (AWD) with Driver Controlled Center Differential (DCCD) Fluid Specifications Manual Transmission Fluid: Subaru Manual Transmission Gear Oil API GL-5 75W-90 (e.g., Subaru genuine part number K0305) or equivalent Dccd Fluid: Subaru D-CCD Fluid (e.g., Subaru genuine part number K0315) or equivalent 📐 Dimensions Exterior Length: 179.5 inches (4559 mm) Width: 70.7 inches (1796 mm) Height: 57.7 inches (1466 mm) Wheelbase: 103.2 inches (2621 mm) Weights Curb Weight: 3373 lbs (1530 kg) Gross Vehicle Weight Rating: 4550 lbs (2064 kg) Wheels And Tires Standard Wheel Size: 18 x 8.5 inches Standard Tire Size: 245/40R18 Bolt Pattern: 5x114.3 mm 🛡️ Safety Features Ratings NHTSA Front Impact: 5 Stars NHTSA Side Impact: 5 Stars IIHS Headlight Ratings: Acceptable Active Features ABS: Yes, 4-wheel ABS with EBD Traction Control: Yes, VDC (Vehicle Dynamics Control) Stability Control: Yes, VDC (Vehicle Dynamics Control) Passive Features Airbags: Driver and front passenger airbags, front side-impact airbags, front and rear side-curtain airbags. Seatbelts: 3-point height-adjustable front seatbelts with pretensioners and load limiters, rear 3-point seatbelts. Child Seat Anchors: LATCH (Lower Anchors and Tethers for CHildren) system 💡 Technology Features Infotainment Head Unit: Standard AM/FM/CD/MP3 audio system with auxiliary input and available subwoofer. Optional navigation system. Display: Multi-function display in dashboard for vehicle information, climate control, and audio. Driver Assistance Cruise Control: Standard cruise control functionality. Keyless Entry: Remote keyless entry system. Connectivity Bluetooth: Available Bluetooth hands-free connectivity. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 6 months, whichever comes first (severe driving conditions), or 7,500 miles/12 months (normal). Air Filter Replacement: Every 15,000 miles or 12 months, or as needed based on conditions. Spark Plug Replacement: Every 60,000 miles (Iridium type) Timing Belt Replacement: N/A (EJ257 uses a timing chain) Fluid Specifications Engine Oil Capacity: 5.8 US quarts (5.5 Liters) with filter change (Subaru recommends 5W-30 Synthetic) Coolant Capacity: Approx. 7.5 US quarts (7.1 Liters) Brake Fluid Type: DOT 3 or DOT 4 brake fluid Known Issues Ej257 Ring Land Failure: Potential for ring land failure, especially in heavily modified or poorly maintained engines, due to detonation. Requires careful monitoring and potentially upgraded components. Clutch Wear: Can be prone to accelerated wear with aggressive driving or frequent clutch use. Manual specific information on inspection and replacement is crucial. Dccd Actuator Failure: The electronic Driver Controlled Center Differential actuator can fail, leading to AWD system issues. Manual will detail diagnostics and repair. 📚 Vehicle History Brand Heritage Motorsport Legacy: Subaru's rich history in the World Rally Championship (WRC), with multiple driver and manufacturer titles, deeply influences the WRX STI. Model Evolution Generation: Third Generation (GR/GV) - Hatchback (GR) and Sedan (GV) introduced for 2008-2014 model years. Key Changes 2011: Minor styling updates, revised suspension tuning, and improved interior materials compared to earlier models of this generation. Production Manufacturing Location: Ota City, Gunma Prefecture, Japan 🏆 Awards &...