🏷️ Basic Information Identification Make: Subaru Model: Impreza STi RS WRX Year: 2006 Codes Chassis Code General: GDB (for WRX/STi) Engine Codes Covered: EJ207 (STi), EJ255 (WRX), EJ257 (STi, North America) 👋 Introduction Market Position Vehicle Segment: Performance Compact Sedan/Hatchback Target Audience: Enthusiasts, performance drivers, rally-inspired individuals, and owners seeking in-depth maintenance knowledge. Competitive Analysis Key Competitors 2006: Mitsubishi Lancer Evolution, Subaru WRX STI (previous generations), Ford Focus RS, Volkswagen Golf GTI. Key Features Performance Focus: The STi and WRX variants are highlighted for their turbocharged Subaru Boxer engines, Symmetrical All-Wheel Drive, and performance-oriented chassis. Manual Utility: Provides essential information for DIY mechanics and professional technicians alike, covering a vast range of repair and maintenance tasks. 📋 Manual Details Coverage Areas General Coverage: Complete repair and service for the 2006 Subaru Impreza STi, RS, and WRX models. Specific Systems: Engine (STi, H4SO, H4DOTC), Transmissions (Automatic, Manual), Chassis, Drivetrain, ABS, Brakes, Power Steering, Clutch, Wheels & Tires, Body, Suspension (Front & Rear), HVAC, Entertainment, Communication, Security, Cruise Control, Wiring. Page Count Estimated Page Count: Likely 2000+ pages (typical for comprehensive workshop manuals of this era and complexity). Manual Type Type: Workshop Manual / Repair Manual / Service Manual Language Language: English Format Format: PDF (Downloadable) 📖 Manual Coverage Systems Covered Engine Diagnostics Repair: Detailed procedures for EJ207, EJ255, and EJ257 engines including disassembly, assembly, inspection, troubleshooting, and component specifications. Transmission Service: Covers both automatic and manual transmissions, including fluid changes, clutch service, gearbox disassembly, and repair procedures. Brake System Overhaul: Complete guide to brake system components, including hydraulic system bleeding, caliper service, rotor replacement, and ABS system diagnostics. Suspension Steering Alignment: Detailed information on front and rear suspension components, steering system overhaul, and wheel alignment procedures. Electrical Diagnostics Wiring: Extensive wiring diagrams, electrical component testing, troubleshooting guides for various electronic systems. Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks, spark plug replacement, timing belt inspection/replacement (where applicable). Troubleshooting Guides: Systematic diagnostic steps for common and uncommon issues, fault code interpretation (where applicable). Component Rebuilding: Detailed instructions for the complete disassembly, inspection, repair, and reassembly of major components like engines and transmissions. Body Panel Repair: Information on bodywork, panel alignment, and minor collision repair procedures. HVAC System Service: Refrigerant handling, component testing, and repair for the heating, ventilation, and air conditioning system. Technical Depth Diagnostic Level: Advanced diagnostics, including engine control unit (ECU) functions and sensor data analysis. Repair Scope: Comprehensive repair procedures, ranging from minor adjustments to major component overhauls and rebuilds. Specification Detail: Includes critical torque specifications, tolerances, and performance data for all covered systems. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable if the PDF is properly OCR'd, enabling quick access to information. Print Quality Print Readability: Designed for clear viewing on-screen and printable for workshop use. Image and diagram quality dependent on original source. Binding Type Binding: Not Applicable (Digital Download) Paper Type Paper Type: Not Applicable (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Horizontally-Opposed (Boxer) 4-Cylinder Engine Variants Covered: EJ207 (2.0L Turbocharged - STi JDM/EDM), EJ255 (2.5L Turbocharged - WRX USDM/CAN), EJ257 (2.5L Turbocharged - STi USDM/CAN). Performance Horsepower Ej207: Approx. 280 PS (276 hp) - JDM/EDM figures vary by market. Torque Ej207: Approx. 343 Nm (253 lb-ft) - JDM/EDM figures vary by market. Horsepower Ej255: Approx. 230 hp (USDM WRX) Torque Ej255: Approx. 235 lb-ft (USDM WRX) Horsepower Ej257: Approx. 300 hp (USDM STi) Torque Ej257: Approx. 290 lb-ft (USDM STi) Fuel System Fuel Injection: Sequential Electronic Fuel Injection Forced Induction: Intercooled Turbocharger System (IHI VF series common) 🔧 Transmission Standard Standard Transmission: 6-speed Manual Transmission (STI), 5-speed Manual Transmission (WRX) Optional Optional Transmission: 4-speed Automatic Transmission (available on WRX, potentially RS, less common on STi). Features AWD System: Subaru Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) on STi models. 📐 Dimensions Exterior Wheelbase Gg Chassis: 2,510 mm (98.8 in) Length Gg Chassis: 4,405 mm (173.4 in) - Sedan / 4,315 mm (169.9 in) - Wagon Width Gg Chassis: 1,740 mm (68.5 in) Height Gg Chassis: 1,440 mm (56.7 in) - Sedan / 1,445 mm (56.9 in) - Wagon Weights Curb Weight Sti: Approx. 1,450 kg (3,197 lbs) - Manual Sedan Curb Weight Wrx: Approx. 1,415 kg (3,120 lbs) - Manual Sedan 🛡️ Safety Features Ratings NHTSA Front Impact: 5-star (for comparable models of the era, specific 2006 data may vary by region). IIHS Rating: Good (for frontal offset, for comparable models of the era). Active Features Traction Control: Standard on WRX and STi. Advanced traction and stability control systems present. ABS: Anti-lock Braking System standard across all models, often with EBD (Electronic Brakeforce Distribution). Passive Features Airbags: Front airbags, side airbags, and curtain airbags (availability varies by trim and market). Seatbelts: 3-point front and rear seatbelts with pretensioners. 💡 Technology Features Infotainment Audio System: Standard CD...