🏷️ Basic Information Identification Make: Subaru Model: Impreza Year: 2006 Codes Chassis Code: GDB (for WRX/STI variants) Model Code: GG/GD (Impreza Sedan/Wagon) 👋 Introduction Market Position Segment: Compact/Sport Compact segment. Reputation: Known for its symmetrical All-Wheel Drive (AWD) system, sporty handling, and rally heritage (particularly WRX and STI models). Competitive Analysis Competitors: Honda Civic, Toyota Corolla, Mitsubishi Lancer, Mazda3, Volkswagen Golf. Key Features AWD Standard: Symmetrical All-Wheel Drive (AWD) is a signature feature, standard on most Impreza models. Engine Layout: Horizontally-opposed (Boxer) engine layout providing a lower center of gravity. Performance Variants: Includes performance-oriented WRX and STI models with turbocharged engines and enhanced suspension/braking systems. 📋 Manual Details Coverage Areas Comprehensive Coverage: All mechanical, electrical, body, and trim components for the 2006 Subaru Impreza. Page Count Estimated Pages: 1500+ Manual Type Type: Factory Service Manual / Shop Manual Language Language: English Format Format: Print 📖 Manual Coverage Systems Covered Engine: Detailed diagnostics, repair, and overhaul procedures for Boxer engines (2.5L naturally aspirated and turbocharged variants). Transmission: Service and repair for manual (5-speed and 6-speed for STI) and automatic transmissions, including clutch, drivetrain, and AWD system components. Brakes: ABS, hydraulic system, caliper, rotor, and parking brake service and repair. Suspension: Front and rear suspension components, alignment specifications, and strut/shock absorber replacement. Steering: Power steering system diagnosis and repair, steering rack and linkage service. Electrical: Complete wiring diagrams, component testing, ECU diagnosis, lighting, and accessories. HVAC: Air conditioning system service, heater core replacement, and climate control unit diagnosis. Body: Body panel repair, interior trim removal, door and window mechanisms, glass replacement. Exhaust: Catalytic converter, muffler, and exhaust manifold service. Procedures Included Maintenance: Routine maintenance procedures, fluid changes, filter replacements, spark plug service. Troubleshooting: Diagnostic flowcharts, common problem identification, and solutions. Repair: Detailed step-by-step instructions for component removal, installation, and adjustment. Diagnostics: On-board diagnostic (OBD-II) codes, sensor testing, and electronic system analysis. Rebuilds: Engine and transmission component overhaul procedures. Technical Depth Depth: Factory-level technical information, suitable for professional technicians and advanced DIY enthusiasts. Parts List Inclusion: Includes a comprehensive parts list for identification and ordering. Diagrams Inclusion: Extensive use of detailed diagrams, illustrations, and exploded views. 📊 Manual Specifications File Format Digital Quality: N/A (Print format) Print Quality Paper Quality: Durable, high-quality paper stock designed for workshop use. Binding Type Binding: Professional, durable binding suitable for frequent use in a workshop environment. ⚙️ Engine Specifications Primary Engine Engine Code: EJ253 (Naturally Aspirated), EJ255 (WRX Turbo), EJ257 (STI Turbo) Displacement: 2.5 Liters (2457 cc) Performance Horsepower Na: Approx. 173 hp @ 5600 rpm (EJ253) Torque Na: Approx. 166 lb-ft @ 4000 rpm (EJ253) Horsepower Wrx: Approx. 224 hp @ 5600 rpm (EJ255) Torque Wrx: Approx. 226 lb-ft @ 3600 rpm (EJ255) Horsepower Sti: Approx. 300 hp @ 6000 rpm (EJ257) Torque Sti: Approx. 350 lb-ft @ 4000 rpm (EJ257) Fuel System Fuel Delivery: Multi-point fuel injection (MPI) with Electronic Throttle Control (ETC). Fuel Type: Unleaded gasoline (91 octane or higher recommended for turbo models). Cooling System Coolant Type: Subaru Genuine Coolant or equivalent (typically Subaru Blue). Lubrication Oil Type: SAE 5W-30 Synthetic recommended (check owner's manual for specific variations). 🔧 Transmission Standard Manual: 5-speed manual (standard on NA models), 6-speed manual (standard on STI). Optional Automatic: 4-speed automatic (available on NA models). Features AWD System: Symmetrical AWD with viscous coupling center differential (manual transmission) or electronically controlled multi-plate transfer clutch (automatic transmission). STI features a Driver Controlled Center Differential (DCCD). Fluid Specifications Manual Transmission Fluid: GL-5 Gear Oil, SAE 75W-90 recommended (Subaru Genuine or equivalent). Automatic Transmission Fluid: Subaru ATF-HP (High Performance) or equivalent. Front Differential Fluid: API GL-5, SAE 75W-90. Rear Differential Fluid: API GL-5, SAE 75W-90 (for most variants); Limited Slip Differential (LSD) fluid required for some performance models. 📐 Dimensions Exterior Length: Approx. 173.8 - 176.8 inches (depending on sedan/wagon body style). Width: Approx. 68.1 - 69.7 inches (depending on trim/variant). Height: Approx. 56.1 - 58.1 inches (depending on body style). Wheelbase: Approx. 101.4 inches. Wheel Bolt Pattern: 5 x 100 mm. Ground Clearance: Approx. 5.7 - 6.1 inches (depending on model). Weights Curb Weight: Approx. 2900 - 3300 lbs (depending on powertrain and trim). 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star (for models tested). IIHS Side Impact: Good (for models tested). Active Features ABS: Standard Anti-lock Braking System. Traction Control: Standard Traction Control System (TCS). Stability Control: Standard Electronic Stability Control (VDC - Vehicle Dynamics Control). Passive Features Airbags: Front and side airbags, available curtain airbags on some trims. Seatbelts: 3-point height-adjustable front seat belts with pretensioners and load limiters, 3-point rear seat belts. Child Seat Anchors: LATCH (Lower Anchors and Tethers for Children) system. 💡 Technology Features Infotainment Head Unit: Standard AM/FM/CD player. Higher trims may feature upgraded audio systems (e.g., premium speakers, subwoofer). Climate Control: Manual climate control; automatic climate control available on higher trims. Driver Assistance...