🏷️ Basic Information Identification Make: Subaru Model: Impreza Year: 2006 Codes Chassis Code: G11/G12 Platform: Subaru Impreza (2nd Generation - GD/GG) 👋 Introduction Market Position Segment: Compact/Sport Compact Sedan and Wagon. Target Audience: Enthusiast drivers, DIY mechanics, performance tuning community. Competitive Analysis Key Competitors 2006: Mitsubishi Lancer Evolution, Honda Civic Si, Mazda3, Volkswagen GTI. Key Features Vehicle Strengths: Symmetrical All-Wheel Drive (AWD), turbocharged engine options (WRX/STI), rally heritage, sporty handling. 📋 Manual Details Coverage Areas General Coverage: Comprehensive service and repair for all aspects of the 2006 Subaru Impreza. Page Count Estimated Page Count: Extensive (typical for factory service manuals, often 2000+ pages) Manual Type Type: Factory Service Manual (FSM) / Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Powertrain: Engine (STi, H4SO, H4DOTC), Transmission (manual and automatic), Drivetrain (AWD system). Chassis: Suspension (front and rear), Steering, Brakes (ABS, EBD), Wheels, Tires. Body And Interior: Body panels, doors, windows, interior trim, seating, HVAC system. Electrical: Wiring diagrams, ECU, lighting, audio system, power accessories, sensors. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks and changes. Diagnostics: Troubleshooting guides, DTC (Diagnostic Trouble Code) interpretation, component testing. Repair: Engine overhaul, transmission repair, brake system servicing, suspension component replacement, electrical system repairs. Assembly Disassembly: Step-by-step instructions for removing and installing all major components and sub-assemblies. Technical Depth Depth: Detailed diagnostic procedures, torque specifications, electrical schematics, exploded views, and overhaul instructions. 📊 Manual Specifications File Format Compatibility: All versions of Windows and Mac OS. Reader Requirement: Adobe Acrobat Reader (or compatible PDF viewer). Print Quality Printability: Printable without restriction. Binding Type Binding: N/A (Digital PDF download) Paper Type Paper Type: N/A (Digital PDF download) ⚙️ Engine Specifications Primary Engine Base Engine Type: Horizontally-opposed (Boxer) 4-cylinder. Engine Variants Non Turbo Engine Code: EJ204 (150 hp / 145 lb-ft) or EJ253 (173 hp / 166 lb-ft depending on market/trim). Turbocharged Engine Code: EJ255 (WRX - approx. 230 hp / 235 lb-ft). Sti Engine Code: EJ257 (STI - approx. 300 hp / 300 lb-ft). Performance Compression Ratio Turbo: 8.4:1 (EJ257 STI) Bore X Stroke Ej257: 99.5 mm x 79.0 mm Fuel System Fuel Delivery: Sequential Multi-Point Fuel Injection (MPI). Fuel Type: Unleaded gasoline, premium unleaded (91 octane or higher) recommended for turbo models. 🔧 Transmission Standard Base Transmission: 5-speed manual transmission (all-wheel drive). Optional Optional Transmission: 4-speed automatic transmission (available on non-turbo models). Sti Transmission Sti Transmission Type: 6-speed manual transmission. Features Drivetrain: Subaru Symmetrical All-Wheel Drive (AWD) with viscous coupling center differential. 📐 Dimensions Exterior Length: Approx. 174.6 inches (4435 mm) for sedan, 173.8 inches (4415 mm) for wagon. Width: Approx. 68.1 inches (1730 mm). Height: Approx. 57.7 inches (1465 mm) for sedan, 56.1 inches (1425 mm) for wagon. Weights Curb Weight: Varies by model and trim, approx. 3000-3300 lbs (1360-1500 kg). Wheelbase: Approx. 104.0 inches (2640 mm). 🛡️ Safety Features Ratings NHTSA Frontal Driver: 5-Star (2006 Impreza). NHTSA Frontal Passenger: 5-Star (2006 Impreza). NHTSA Side Driver: 5-Star (2006 Impreza). NHTSA Side Passenger: 5-Star (2006 Impreza). IIHS Front Impact: Good (2006 Impreza). IIHS Side Impact: Good (2006 Impreza). Active Features ABS: Standard Anti-lock Braking System (ABS). Ebd: Electronic Brake-force Distribution (EBD). Traction Control: Available Traction Control System (TCS) on some models. Passive Features Airbags: Frontal airbags, front side-impact airbags, available curtain airbags. Seatbelts: 3-point seat belts with pretensioners and load limiters. 💡 Technology Features Infotainment Head Unit: Standard single-DIN or double-DIN AM/FM/CD audio system. Optional premium sound system with subwoofer available. Display: Basic LCD display for audio information. Limited to non-nav models. Driver Assistance Cruise Control: Standard cruise control system. Connectivity Aux Input: Optional auxiliary audio input on some models for connecting external music players. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 3 months for severe driving, or 7,500 miles or 6 months for normal driving (refer to owner's manual for specific conditions). Engine Air Filter: Inspect every 15,000 miles, replace as needed. Some recommend replacement every 30,000 miles. Cabin Air Filter: Inspect every 15,000 miles, replace as needed. Some recommend replacement every 30,000 miles. Spark Plugs: Platinum tipped spark plugs typically have a lifespan of 60,000-100,000 miles, depending on type. Fluid Specifications Engine Oil Type: API SG, SH, or SJ classification; SAE 5W-30 is common. Check manual for specific viscosity based on temperature. Coolant Type: Subaru Super Coolant (blue) or equivalent. Diluted 50/50 with distilled water. Brake Fluid Type: DOT 3 or DOT 4 brake fluid. Transmission Fluid Manual: API GL-4, SAE 75W-90 or 75W-85 gear oil for manual transmissions. Transmission Fluid Automatic: Subaru ATF-HP (High Performance) or equivalent Dexron III compatible fluid. Known Issues Head Gaskets: While more prevalent in earlier EJ engines, some later models can experience head gasket leaks due to coolant contamination or overheating. Turbo Lag Sti: Characteristic of the EJ257 engine, though tuning can mitigate. Clutch Wear: Can...