Subaru Impreza WRX STI 2006 Workshop Service Repair Manual

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🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2006 Codes Chassis Code: GDB Engine Code: EJ257 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback Target Audience: Enthusiasts,...

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标签: 2006 Car Cars Impreza WRX STI Misc Subaru

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Description

🏷️ Basic Information

Identification

Make:

Subaru

Model:

Impreza WRX STI

Year:

Codes

Chassis Code:

Engine Code:

EJ257

👋 Introduction

Market Position

Segment:

Performance Compact Sedan/Hatchback

Target Audience:

Enthusiasts, tuners, DIY mechanics, professional technicians

Competitive Analysis

Competitors:

Mitsubishi Lancer Evolution, Subaru WRX (non-STI variants)

Key Features

Performance Focus:

All-wheel drive, turbocharged boxer engine, rally heritage

Manual Value Proposition:

Empowers owners and technicians with in-depth knowledge for maintenance, repair, and customization

📋 Manual Details

Coverage Areas

Primary Coverage:

Mechanical, Electrical, Body, Diagnostics

Secondary Coverage:

Maintenance, Repair, Overhaul, Troubleshooting

Page Count

Estimated Pages:

Approximately 3000+

Manual Type

Type:

Workshop Service Repair Manual

Language

Language:

English

Format

Format:

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Engine assembly, cylinder head, pistons, crankshaft, lubrication, cooling

Engine Management:

ECU, fuel injection, ignition system, emissions control, turbocharger system

Transmission Drivetrain:

Manual transmission (TY856), differential, driveshafts, AWD system (DCCD)

Suspension Steering:

Front and rear suspension, steering gear, power steering

Brakes:

Brake system, ABS, parking brake, brake fluid specifications

Electrical System:

Battery, charging system, starting system, lighting, wiring diagrams, fuses, relays

Body Exterior:

Body panels, doors, hood, trunk, bumpers, exterior trim, glass

Body Interior:

Interior trim, seats, dashboard, airbags, HVAC system

Diagnostics Troubleshooting:

On-board diagnostics (OBD-II), DTC codes, symptom-based troubleshooting guides

Procedures Included

Maintenance:

Scheduled maintenance, oil changes, filter replacements, spark plug service

Repair Overhaul:

Engine rebuild, transmission rebuild, brake caliper replacement, suspension component replacement

Diagnostics:

Troubleshooting electrical faults, diagnosing engine performance issues

Installation Adjustment:

Component installation (e.g., clutch, turbocharger), calibration procedures

Technical Depth

Depth:

Comprehensive, covering routine maintenance to major component overhauls and detailed diagnostics

Detail Level:

Detailed exploded views, torque specifications, diagnostic flowcharts, wiring diagrams

📊 Manual Specifications

File Format

File Type:

Searchability:

Searchable text content

Printability:

Printable pages

Print Quality

Image Resolution:

High-resolution for clear diagrams and illustrations

Binding Type

Binding:

N/A (Digital PDF)

Paper Type

Paper:

N/A (Digital PDF)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Horizontally-opposed turbocharged 4-cylinder (Boxer)

Displacement:

2.5 Liters (2457 cc)

Engine Code:

EJ257

Bore X Stroke:

99.5 mm x 80.0 mm

Compression Ratio:

8.2:1

Valve Train:

DOHC, 16 valves, belt-driven

Performance

Horsepower Hp:

300 hp @ 6000 rpm

Torque Lb-Ft:

300 lb-ft @ 4000 rpm

Redline Rpm:

7000 rpm

Fuel System

Fuel Delivery:

Multi-point Fuel Injection (MPI)

Fuel Type:

Premium Unleaded Gasoline (91+ Octane Recommended)

Turbocharger:

IHI VF39 (Domestically Marketed Models)

Intercooler:

Top-mount air-to-air intercooler

🔧 Transmission

Standard

Type:

6-Speed Manual Transmission

Model Code:

TY856

Optional

Type:

N/A (STI exclusively manual)

Features

Dccd:

Driver Controlled Center Differential (DCCD) with automatic and manual modes

AWD System:

Symmetrical All-Wheel Drive with viscous coupling center differential and rear limited-slip differential (LSD)

Fluid Specifications

Transmission Fluid Type:

GL-5 Gear Oil (e.g., Subaru Extra-S Gear Oil)

Transmission Fluid Capacity:

Approx. 2.5 Liters

📐 Dimensions

Exterior

Length:

4405 mm (173.4 in)

Width:

1770 mm (69.7 in)

Height:

1440 mm (56.7 in)

Wheelbase:

2625 mm (103.3 in)

Ground Clearance:

135 mm (5.3 in)

Weights

Curb Weight:

Approx. 1515 kg (3340 lbs)

Gross Weight Rating:

Approx. 1950 kg (4299 lbs)

🛡️ Safety Features

Ratings

NHTSA Front Crash Rating:

4 Stars (Driver), 5 Stars (Passenger)

IIHS Crash Test Ratings:

Good (Frontal Offset), Acceptable (Side Impact)

Active Features

Standard Anti-lock Braking System

Electronic Brake-force Distribution (EBD)

Traction Control:

Traction Control System (TCS)

Passive Features

Airbags:

Driver and front passenger airbags, front side airbags

Seatbelts:

3-point front and rear seatbelts with pre-tensioners

Rollover Protection:

Reinforced body structure

💡 Technology Features

Infotainment

Head Unit:

Factory AM/FM/CD audio system with optional subwoofer

Display:

Basic LCD display for audio and climate

Driver Assistance

Cruise Control:

Standard Cruise Control

All Wheel Drive:

Advanced Symmetrical AWD with DCCD for dynamic torque distribution

Connectivity

Aux Input:

Optional auxiliary audio input

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,750 miles or 3 months (severe duty/enthusiast driving) or 7,500 miles or 6 months (normal duty)

Air Filter Replacement:

Every 15,000 miles or 12 months

Spark Plug Replacement:

Every 60,000 miles (iridium type)

Timing Belt Replacement:

Every 105,000 miles or 7 years (refer to manual for exact interval)

Fluid Specifications

Engine Oil Type:

0W-30 Synthetic (API SN or higher recommended, SAE 5W-30 acceptable)

Engine Oil Capacity:

Approx. 4.8 US quarts (4.6 L) with filter change

Coolant Type:

Subaru Super Coolant (Blue) or equivalent (50/50 mix with distilled water)

Brake Fluid Type:

DOT 3 or DOT 4

Known Issues

Head Gaskets:

While less common on EJ257 than earlier EJ25s, coolant leaks can still occur. Manual details inspection and replacement.

Ringland Failure:

Potential for piston ringland failure under high boost/improper tuning. Manual provides diagnostic steps.

Clutch Wear:

Can be subject to accelerated wear due to performance driving. Manual covers clutch inspection and replacement.

Turbocharger Wear:

VF39 turbo can develop shaft play over time. Manual offers troubleshooting and rebuild guidance.

📚 Vehicle History

Brand Heritage

Motorsport Roots:

Subaru's extensive rally history, particularly in the World Rally Championship (WRC)

Model Evolution

Generation:

Second Generation (GD/GG Impreza, 2000-2007)

Year Specific Changes:

Updated styling, suspension tuning, and power increase for 2006 model year

Production

Manufacturing Plant:

Ōta, Gunma, Japan

Production Years:

2000-2007 (GD/GG platform)

🏆 Awards & Recognition

Recognitions

Car And Driver:

Car and Driver 10Best list (multiple years for WRX/STI variants)

Motor Trend:

MotorTrend Car of the Year contender (previous generations)

Certifications

Rally Heritage Certification:

Homologated for WRC (World Rally Championship) competition, influencing its design and capabilities