🏷️ Basic Information Identification Make: Subaru Model: Impreza Trim Levels Covered: WRX, WRX STI, RS Year: 2006 Codes Chassis Code: GDB (WRX/STI), GD (RS) 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback (World Rally Champion heritage) Competitors: Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Honda Civic Si, Mazda Mazdaspeed3 Key Features Performance Focus: Subaru's signature Symmetrical All-Wheel Drive, turbocharged boxer engines, and rally-bred performance characteristics Rally Heritage: Direct lineage from Subaru's dominant World Rally Championship (WRC) cars Enthusiast Appeal: Highly regarded for its engaging driving dynamics, customizable nature, and strong aftermarket support 📋 Manual Details Coverage Areas Primary Regions: Global (with potential for regional variations highlighted) Vehicle Systems: Engine, Drivetrain, Chassis, Body, Electrical, HVAC, Safety Systems Page Count Estimated Pages: 1500+ Manual Type Type: Factory Service Manual (FSM) / Workshop Manual / Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: EJ255 (WRX), EJ257 (STI) - Disassembly, assembly, inspection, lubrication, cooling, fuel delivery, ignition, exhaust, emissions control Engine Management: ECU diagnosis, sensor operation, fuel injection strategy, ignition timing control, emissions controls (EVAP, secondary air injection) Transmission: TY756 (STI 6MT), TY856 (STI 6MT), CZ (WRX 5MT) - Operation, maintenance, repair, overhaul procedures, fluid specifications, differential maintenance Drivetrain: All-Wheel Drive (AWD) system, center differential, front and rear differentials, driveshafts, axles, hubs Suspension: Front MacPherson strut, rear double wishbone, sway bars, bushings, alignment specifications Brakes: Front Brembo (STI), Lucas (WRX) - Disc brakes, ABS system, brake fluid specifications, bleeding procedures, rotor and pad replacement Steering: Power assisted rack and pinion, steering column, pump, fluid specifications Electrical System: Battery, charging system, starter, lighting, horn, power windows, wipers, mirrors, power locks, fuses, relays, wiring diagrams Climate Control: HVAC system, A/C compressor, refrigerant R134a, heater core, blower motor, controls Body Exterior: Body panels, doors, hood, trunk, bumpers, glass, trim, rust prevention, corrosion control Body Interior: Seats, dashboard, door panels, headliner, carpeting, safety belts, airbags Procedures Included Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, air filter service, brake pad/rotor inspection and replacement, tire rotation, coolant flush Troubleshooting: Diagnostic trouble codes (DTCs), symptom-based troubleshooting guides, electrical diagnostics, mechanical issues Repair: Engine component replacement (pistons, connecting rods, camshafts), transmission rebuild, clutch replacement, brake caliper overhaul, strut replacement, exhaust system repair, body panel repair, electrical component replacement Diagnostics: OBD-II scanning, sensor testing, actuator testing, pressure testing (fuel, oil, coolant), compression testing Technical Specifications: Torque specifications for all fasteners, clearances, tolerances, fluid capacities, electrical specifications Technical Depth Depth: Comprehensive: Covers everything from basic maintenance to complete engine and transmission overhauls, including detailed electrical troubleshooting and body repair. Suitable for professional mechanics and advanced DIY enthusiasts. 📊 Manual Specifications File Format Compatibility: All versions of Windows & Mac Searchable: Yes (typical for PDF manuals) Printable: Yes Print Quality Quality: High Quality (as stated in description) Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Wrx Engine: 2.5L Turbocharged EJ255 Boxer-4 Sti Engine: 2.5L Turbocharged EJ257 Boxer-4 (Intercooled Turbo) Rs Engine: 2.5L Naturally Aspirated EJ253 Boxer-4 (typically) Performance Wrx Horsepower: 230 hp @ 5600 rpm Wrx Torque: 235 lb-ft @ 3600 rpm Sti Horsepower: 300 hp @ 6000 rpm Sti Torque: 350 lb-ft @ 4000 rpm Fuel System Wrx Sti Fuel System: Multi-point fuel injection (MPI), Electronic Throttle Control (ETC) Required Fuel Octane: Premium Unleaded 91 octane or higher recommended for WRX/STI 🔧 Transmission Standard Wrx Transmission: 5-speed Manual (TY756 or similar) Sti Transmission: 6-speed Manual (TY856) Optional Wrx Sti Optional Transmission: None (performance models were manual-only) Features Sti Center Differential: Driver Controlled Center Differential (DCCD) with automatic and manual modes Sti Differential Type: Helical Limited Slip Front Differential, Torsen Limited Slip Rear Differential 📐 Dimensions Exterior Wheelbase: 103.0 inches (2616 mm) Length: 173.8 inches (4415 mm) Width: 69.7 inches (1770 mm) Height: 57.1 inches (1450 mm) Weights Sti Curb Weight: Approx. 3296 lbs (1495 kg) Wrx Curb Weight: Approx. 3143 lbs (1426 kg) Wheel Bolt Pattern: 5x114.3 mm Tire Size Sti: 225/45R17 (standard), 235/40R18 (optional/STI) Tire Size Wrx: 225/45R17 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star (Driver), 4-Star (Passenger) for sedan models IIHS Small Overlap Front: Not Rated (typical for this era and model) Active Features ABS: Standard on all models Traction Control: Standard on STI, optional/unavailable on some WRX trims Electronic Stability Control: Standard on STI, optional/unavailable on some WRX trims Passive Features Airbags: Frontal airbags, front side-impact airbags (standard on STI, optional/standard on WRX depending on trim) Seatbelts: 3-point front and rear seatbelts, pretensioners, force limiters 💡 Technology Features Infotainment Head Unit: Factory single-CD player with AM/FM radio, optional premium audio system Display: Simple LCD display for radio and clock Driver Assistance Cruise Control: Standard Anti Lock Brakes: Standard All Wheel Drive: Symmetrical All-Wheel Drive with viscous coupling center differential (STI adds DCCD) Connectivity Auxiliary Input: Optional on some models Bluetooth:...