🏷️ Basic Information Identification Make: Subaru Model: Impreza Year: 2006 Generation Generation Code: GDB/GGB (Third Generation - North American Model Codes) Codes Chassis Codes: GDB (Sedan), GGB (Wagon) 👋 Introduction Market Position Segment: Compact/Sport Compact Target Audience: Enthusiasts, DIY mechanics, professional repair shops Competitive Analysis Competitors 2006: Honda Civic Si, Volkswagen GTI, Mazda3, Mitsubishi Lancer Evolution (for STI models) Key Features Driving Dynamics: Symmetrical All-Wheel Drive (standard on most models), balanced chassis, responsive steering Performance Variants: WRX and STI models offered significantly enhanced performance with turbocharged engines and performance-tuned suspension/brakes. 📋 Manual Details Coverage Areas Engine Variants Covered: H4SO (Naturally Aspirated), H4DOTC (Turbocharged - WRX/STI) Transmission Variants Covered: 5-speed Manual, 6-speed Manual (STI), 4-speed Automatic Body Styles Covered: Sedan, Wagon Page Count Estimated Page Count: Approximately 1000+ pages (typical for factory service manuals) Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Powertrain: Engine (Mechanical, Fuel Injection, Emission Control, Cooling, Lubrication, Ignition, Starting/Charging, Diagnostics), Transmission (Manual, Automatic, Clutch, Drivetrain, Differentials, Transfer Case) Chassis And Suspension: Front Suspension, Rear Suspension, Wheels, Tires, ABS, Brakes, Parking Brake, Power Steering Body And Interior: HVAC, Airbag System, Seatbelts, Lighting, Wipers/Washers, Entertainment/Communication, Glass, Body Structure, Instrumentation, Seats, Security, Locks, Sunroof, Exterior/Interior Trim, Exterior Body Panels, Cruise Control, Immobilizer Electrical And Diagnostics: Wiring Diagrams, Component Diagnostics, System Diagnostics (Engine, Transmission, ABS, HVAC, Airbag) Procedures Included Maintenance: Pre-delivery Inspection, Periodic Maintenance Services, Recommended Materials, Fluid Specifications Repair And Rebuild: Disassembling, Reassembling, Inspection, Adjustment of all major components and systems Diagnostics And Troubleshooting: System-specific diagnostics, fault code interpretation, troubleshooting procedures Technical Depth Depth: Comprehensive. Covers basic maintenance to advanced diagnostics and component-level repairs. Designed for experienced mechanics. 📊 Manual Specifications File Format Quality: High Quality PDF Searchable: Likely searchable text within PDF (common for factory manuals) Print Quality Pages Printable: All Pages Printable Binding Type Binding: Digital (PDF) Paper Type Paper Type: N/A (Digital) ⚙️ Engine Specifications Primary Engine Naturally Aspirated: 2.5L H4SO (EJ253) - SOHC, Naturally Aspirated Turbocharged: 2.5L H4DOTC (EJ257) - DOHC, Turbocharged (WRX/STI) Performance Hp Na: Approx. 173 hp @ 5600 rpm (H4SO) Torque Na: Approx. 166 lb-ft @ 4000 rpm (H4SO) Hp Turbo: Approx. 230 hp @ 5500 rpm (WRX), 300 hp @ 6000 rpm (STI) (H4DOTC) Torque Turbo: Approx. 235 lb-ft @ 3600 rpm (WRX), 290 lb-ft @ 4000 rpm (STI) (H4DOTC) Fuel System Injection Type: Electronic Fuel Injection (EFI) - Sequential Multi-Port Fuel Injection (MPI) Fuel Type: Unleaded Gasoline (Premium recommended for Turbocharged models) Emission Control Systems: Catalytic Converter, EGR (Exhaust Gas Recirculation), Secondary Air Injection (Auxiliary Emission Control Devices) 🔧 Transmission Standard Type: 5-speed Manual Transmission (RWD/AWD) Optional Type: 4-speed Automatic Transmission (AWD) Type Sti: 6-speed Manual Transmission (AWD) (STI models) Features AWD System: Symmetrical All-Wheel Drive with viscous coupling center differential (manual), Active Torque Split All-Wheel Drive (automatic) Clutch Type: Hydraulic Clutch System 📐 Dimensions Exterior Wheelbase: Approx. 103.0 inches (2616 mm) Length: Sedan: Approx. 179.7 inches (4565 mm); Wagon: Approx. 178.0 inches (4520 mm) Weights Curb Weight Min: Approx. 3000 lbs (1360 kg) Curb Weight Max: Approx. 3300 lbs (1497 kg) (STI models) 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star (Driver), 4-Star (Passenger) (2006 Model Year) IIHS Front Offset: Good (2006 Model Year) Active Features ABS: Standard (4-wheel disc brakes with ABS) Traction Control: Available on some models Passive Features Airbags: Front Dual SRS Airbags, Front Side SRS Airbags, Available Side Curtain SRS Airbags Seatbelts: 3-point ELR front and rear seatbelts with pretensioners and force limiters 💡 Technology Features Infotainment Audio System: Standard AM/FM/CD player. Available premium audio systems with subwoofer. AUX input may be present on some models/aftermarket. Driver Assistance Cruise Control: Standard on most trims, with specific variations for engine types (H4SO, H4DOTC). Immobilizer: Factory immobilizer system for anti-theft. Connectivity Oem Connectivity: Limited by modern standards; typically no Bluetooth or USB from factory. Focus on core vehicle systems. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 3 months (severe conditions), or 7,500 miles or 6 months (normal conditions) - Consult manual for exact specs. Engine Air Filter: Replace every 15,000 miles (STI) or 30,000 miles (NA) or as needed based on driving conditions. Spark Plugs: Replace 60,000 miles (NA) or 30,000 miles (Turbocharged - iridium plugs recommended) Fluid Specifications Engine Oil Type Na: API SG or higher, SAE 5W-30 (check manual for exact viscosity and specific Subaru oil recommendations) Engine Oil Type Turbo: API SG or higher, SAE 5W-30 or 5W-40 (check manual for exact viscosity and specific Subaru oil recommendations, often synthetic) Transmission Fluid Manual: Subaru Genuine Gear Oil (API GL-5, SAE 75W-90) or equivalent Transmission Fluid Automatic: Subaru Genuine ATF-HP or equivalent Coolant: Subaru Genuine Coolant (Blue) or equivalent, typically a 50/50 mix with distilled water Known Issues Head Gaskets: While more common on earlier EJ25 engines, 2006 models can...