🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX & Impreza WRX STI Model Year: 2011 Codes Chassis Code: GE/GH/GR/GV Wrx Engine Code: EJ255 Sti Engine Code: EJ257 👋 Introduction Market Position Segment: Performance compact sedan/hatchback, rally-bred sport compact. Key Selling Points: All-wheel drive, turbocharged performance, rally heritage, driver engagement. Competitive Analysis Rivals: Mitsubishi Lancer Evolution, Volkswagen GTI, Mazdaspeed3, Ford Focus ST. Key Features Wrx Features: 2.5L turbocharged EJ255 engine, symmetrical all-wheel drive, sport-tuned suspension, upgraded brakes, aggressive styling. Sti Features: 2.5L turbocharged EJ257 engine (higher output), DCCD (Driver Controlled Center Differential), Brembo brakes, stronger engine internals, 6-speed manual transmission, more aggressive aero. 📋 Manual Details Coverage Areas Models Covered: All Subaru Impreza WRX and WRX STI variants for the 2011 model year, including all engine and trim options. Page Count Estimated Page Count: 1500+ Manual Type Type: Complete Service and Repair Manual Language Language: English Format Format: Digital (likely PDF) 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, lubrication, cooling, fuel, ignition, exhaust, emissions control, turbocharger systems, and engine management (ECU). Transmission Drivetrain: Manual transmission (TY756 for WRX, TY856 for STI), clutch, differentials (front, center, rear - including DCCD for STI), driveshafts, axles. Chassis Suspension Steering: Front and rear suspension (MacPherson struts front, multi-link rear), steering system, wheel bearings, hubs. Brakes: Front and rear brake systems (including Brembo for STI), ABS, EBD, brake fluid, hydraulic lines, parking brake. Electrical Electronics: Battery, charging system, starting system, lighting, instrumentation, power accessories, body control module (BCM), ECU/ECM diagnostics, CAN bus communication. Body Exterior Interior: Body panels, doors, windows, sunroof, seats, interior trim, HVAC, airbags, safety restraints. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspection/replacement. Diagnostics Troubleshooting: Systematic troubleshooting guides, diagnostic trouble codes (DTCs) and their meanings, electrical circuit diagrams. Repair Overhaul: Detailed step-by-step instructions for major component removal, installation, and overhaul (e.g., engine rebuild, transmission repair, brake caliper replacement). Special Tools Procedures: Identification and usage of specialized tools required for specific repairs and adjustments. Technical Depth Depth: Comprehensive. Covers everything from basic fluid checks and tire rotations to in-depth engine mechanical repairs, electrical system diagnostics, and bodywork adjustments. Suitable for professional technicians and advanced DIY enthusiasts. 📊 Manual Specifications File Format Format Details: Likely a searchable PDF, allowing for quick text-based navigation and printing of specific sections. Print Quality Quality: High-resolution, clear diagrams, schematics, and photographs for accurate reference. Binding Type Type: N/A (Digital format) Paper Type Type: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Wrx Engine: 2.5L (2457cc) EJ255 flat-four, turbocharged, intercooled. Sti Engine: 2.5L (2457cc) EJ257 flat-four, turbocharged, intercooled, with AVCS (Active Valve Control System). Performance Wrx Horsepower: 265 hp @ 6000 rpm Wrx Torque: 244 lb-ft @ 4000 rpm Sti Horsepower: 305 hp @ 6000 rpm Sti Torque: 290 lb-ft @ 4000 rpm Fuel System Injection Type: Multi-point fuel injection (Sequential). Fuel Requirement: Premium Unleaded (91 octane or higher recommended). Cooling System Radiator Capacity: Approx. 7.4 US quarts (7.0 L). Lubrication Oil Capacity W Filter: 5.8 US quarts (5.5 L). Recommended Oil Viscosity: 5W-30 (check manual for climate variations). 🔧 Transmission Standard Wrx Transmission: 5-speed Manual (TY756). Sti Transmission: 6-speed Manual (TY856). Optional Availability: No automatic transmission offered for WRX or WRX STI in 2011. Features Sti Dccd: Driver Controlled Center Differential with Auto mode for variable torque distribution. Drivetrain Differential Type: Symmetrical All-Wheel Drive with front helical LSD, rear viscous LSD (WRX); Front helical LSD, rear mechanical LSD with DCCD (STI). Fluid Specs Manual Transmission Fluid Type: GL-5 75W-90 Synthetic (check manual for specific Subaru-branded or approved fluids). Fluid Capacity Manual Transmission Capacity: Approx. 2.4 US quarts (2.3 L). 📐 Dimensions Exterior Wheelbase: 103.3 inches (2624 mm) Length: 173.8 inches (4415 mm) Width: 70.7 inches (1796 mm) Height: 58.1 inches (1476 mm) Weights Curb Weight: Approx. 3290-3350 lbs (1492-1519 kg) for WRX, 3370-3440 lbs (1529-1560 kg) for STI. Cargo Trunk Volume: 11.3 cubic feet (sedan models). Wheels Tires Wheelbase Sti: 103.2 inches (2620 mm) Wheel Size: 17-inch (WRX), 18-inch (STI) Tire Size Wrx: 225/45R17 Tire Size Sti: 245/40R18 Bolt Pattern: 5x100mm 🛡️ Safety Features Ratings NHTSA Front Crash Test: 5-Star (for 2011 Impreza models overall). IIHS Top Safety Pick: Yes (for 2011 Impreza models overall). Active Features Traction Control: Yes (Subaru VDC - Vehicle Dynamics Control). ABS: Standard Anti-lock Braking System. Ebd: Standard Electronic Brake-force Distribution. Passive Features Airbags: Front dual-stage airbags, front side-impact airbags, side-curtain airbags. Seatbelts: 3-point height-adjustable front seatbelts with pretensioners and load limiters, rear 3-point seatbelts. Chassis Design: Ring-shaped reinforcement frame for enhanced crash protection. 💡 Technology Features Infotainment Audio System: Standard AM/FM/CD stereo with MP3 capability, auxiliary input, available SiriusXM Satellite Radio. Optional navigation system available. Driver Assistance Cruise Control: Standard cruise control. Climate Control: Manual or automatic climate control depending on trim level. Connectivity Bluetooth: Available Bluetooth hands-free connectivity on higher...