Vehicle Segment:
Compact sports sedan/hatchback (performance-oriented).
Key Competitors:
Mitsubishi Lancer Evolution, Subaru WRX (non-STI variants), Volkswagen Golf GTI, Honda Civic Si.
Performance Focus:
Renowned for its Symmetrical All-Wheel Drive system, turbocharged boxer engines, and rally-bred performance heritage.
Manual Value Proposition:
Provides dealership-level repair and maintenance expertise, enabling owners to perform complex tasks, saving on labor costs and ensuring proper vehicle care.
Documentation Scope:
Comprehensive A-Z repair and maintenance for all models and all repairs.
Estimated Pages:
1500+ (typical for such comprehensive workshop manuals)
Type:
Factory-Authorized Workshop Manual / Service and Repair Manual
Format:
Digital (PDF) or Printed (as per product offering, assumed high-quality reproduction if printed)
Powertrain:
Engine mechanical (EJ255, EJ257), fuel system, ignition system, exhaust system, turbocharger system, intercooler system.
Transmission:
Manual transmission (TY856), clutch system, drivetrain (AWD system, differentials, driveshafts).
Chassis:
Suspension (front and rear), steering system, braking system (ABS, EBD), wheel alignment, body and frame.
Electrical:
Engine control module (ECM), body control module (BCM), lighting, instrumentation, audio system, power accessories, wiring diagrams, diagnostic trouble codes (DTCs).
Maintenance:
Routine maintenance, fluid changes, filter replacements, scheduled servicing.
Diagnosis And Troubleshooting:
System diagnostics, fault finding, symptom-based troubleshooting, DTC interpretation.
Repair And Rebuild:
Component disassembly, inspection, repair, and reassembly for all major systems. Includes engine rebuild procedures, transmission overhaul, brake caliper replacement, etc.
Special Tools And Equipment:
Identification and usage of specific Subaru-required tools for repairs and diagnostics.
Depth:
In-depth technical information, including specifications, tolerances, torque values, and diagnostic procedures, equivalent to dealership technician level.
Digital Format:
PDF (likely searchable and printable)
Print Quality:
High-resolution scans ensuring clarity of diagrams, text, and images.
Binding:
N/A (if digital) or Professional binding (if printed)
Paper Type:
N/A (if digital) or Durable, high-quality paper suitable for workshop environments (if printed)
Configuration Sti:
2.5L Flat-4 (Boxer), turbocharged, intercooled
Horsepower Sti Approx:
300 hp @ 6000 rpm (SAE Net)
Torque Sti Approx:
310 lb-ft @ 4000 rpm (SAE Net)
Engine Code Non Sti:
EJ255 (common, may vary by specific non-STI model)
Configuration Non Sti:
2.5L Flat-4 (Boxer), naturally aspirated or turbocharged (depending on specific Impreza model within 2006-2007 range, though manual specifies 'Turbo NON Turbo')
Horsepower Non Sti Approx:
170-237 hp (depending on naturally aspirated or turbo WRX variants)
Torque Non Sti Approx:
170-250 lb-ft (depending on naturally aspirated or turbo WRX variants)
Injection Type:
Multi-point fuel injection (MPI) or Sequential Electronic Fuel Injection (SEFI), including high-performance injectors for STI.
Fuel Requirement:
Premium Unleaded (91 octane or higher recommended for STI)
ECU Type:
Subaru Engine Control Module (ECM) with advanced tuning capabilities for STI.
Transmission Type Sti:
6-speed manual transmission (TY856)
Transmission Type Non Sti:
5-speed manual transmission (likely for non-STI WRX) or 4/5-speed automatic (for base Impreza models, but manual focus is likely performance variants).
Optional Transmission:
5-speed automatic transmission (less common for performance models, but may be covered for standard Impreza variants)
AWD System:
Subaru Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) for STI, viscous coupling center differential for WRX.
Clutch Type:
Hydraulically actuated, multi-plate (STI) or single-plate (WRX).
NHTSA Rating 2006:
Likely 5-star frontal driver/passenger, 4-star frontal offset, 5-star side impact (typical for the generation, consult specific model year reports).
Traction Control:
Subaru Vehicle Dynamics Control (VDC) system.
ABS:
Anti-lock Braking System (ABS) with Electronic Brakeforce Distribution (EBD).
AWD:
Symmetrical All-Wheel Drive (essential safety and performance feature).
Airbags:
Frontal airbags, side curtain airbags, front side airbags.
Seatbelts:
Three-point height-adjustable seatbelts with pretensioners.
Body Structure:
Advanced crumple zones and energy-absorbing structure.
Audio System:
Factory premium audio system with CD player, AM/FM radio, and potentially auxiliary input. STI models may feature enhanced speaker systems.
Cruise Control:
Standard electronic cruise control.
Instrument Cluster:
Performance-oriented instrument cluster with tachometer, speedometer, boost gauge (STI), and various warning lights. Manual details gauge cluster removal and diagnostics.
Wiring Diagrams:
Comprehensive wiring diagrams for all electrical systems, essential for diagnosing and repairing electronic faults or adding aftermarket components.
Engine Oil Change Sti:
Every 3,750 miles or 6 months for severe driving, 7,500 miles or 12 months for normal driving (consult manual for exact Subaru recommendation).
Engine Oil Change Non Sti:
Similar intervals to STI, potentially slightly longer for naturally aspirated variants.
Engine Oil Type:
SAE 5W-30 (synthetic recommended for STI), API SG or higher.
Coolant Type:
Subaru Super Coolant (Blue) or equivalent ethylene glycol-based coolant.
Transmission Fluid Sti:
Subaru Extra-S (or equivalent GL-5 rated gear oil) for 6-speed manual. For AWD center differential, specific Subaru gear oil is often recommended.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Head Gasket Failure:
While less prevalent in EJ257 engines compared to earlier generations, it can still occur. Manual covers inspection and replacement procedures.
Piston Ringland Failure:
Can occur in high-performance driving or with inadequate tuning. Manual details piston inspection.
Turbocharger Issues:
Wear or failure of the turbocharger or wastegate actuator. Manual details turbocharger inspection and replacement.
Clutch Wear:
Normal wear and tear, or premature failure with aggressive driving. Manual covers clutch inspection and replacement.
Subaru Rally Roots:
Subaru's rich history in World Rally Championship (WRC) heavily influenced the development and tuning of the Impreza WRX STI.
Third Generation Impreza:
The 2006-2007 models represent the latter part of the GDB/GGB chassis generation, with styling refinements and performance enhancements over earlier iterations.
Manufacturing Location:
Ota City, Gunma Prefecture, Japan.
Performance Accolades:
Consistently ranked among the best performance cars in its class by automotive publications like Car and Driver and MotorTrend for its handling, powertrain, and AWD capabilities.
General Motors Rating:
N/A (Subaru is an independent manufacturer)
Emissions Compliance:
Meets all relevant emissions standards for the model years covered. Manual details emissions control system components and testing procedures.
