Subaru Impreza WRX STI 2006 Factory Service Repair Manual

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🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2006 Generation Generation Code: GDB/GGB (Third Generation) Codes Chassis Codes: GDB-E (Sedan), GGB-E (Wagon) 👋 Introduction Market Position Segment:...

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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:

Generation

Generation Code:

GDB/GGB (Third Generation)

Codes

Chassis Codes:

GDB-E (Sedan), GGB-E (Wagon)

👋 Introduction

Market Position

Segment:

Performance Compact Sedan/Wagon ( Rally-bred homologation special)

Competitive Analysis

Key Competitors:

Mitsubishi Lancer Evolution, Subaru WRX (non-STI variants), Volkswagen Golf GTI (in spirit), Ford Focus RS

Key Features

Performance Focus:

Engineered for rally racing homologation, emphasizing power, handling, and all-wheel-drive capability.

AWD System:

Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) for advanced traction management.

Braking System:

Iconic Brembo braking system for superior stopping power and heat management.

📋 Manual Details

Coverage Areas

Primary Regions Covered:

North America, Europe, Japan (specifications may vary by market)

Page Count

Estimated Pages:

1000+

Manual Type

Type:

Factory Service Manual / Repair Manual

Language

Language:

English

Format

Format:

Downloadable PDF

📖 Manual Coverage

Systems Covered

Engine:

EJ257 (2.5L Turbocharged Boxer, DCCD variations)

Powertrain:

Manual Transmission (6-speed), Clutch, Drivetrain (Symmetrical AWD, DCCD, Helical LSD, Driver Controlled Center Differential)

Suspension:

Front MacPherson struts, Rear Multi-link independent, STI-specific tuning, Dampers, Springs, Bushings

Brakes:

Front Brembo 4-piston calipers, Rear Brembo 2-piston calipers, ABS, Brake Booster, Master Cylinder

Electrical:

Wiring Diagrams, ECU, Sensors, Ignition System, Charging System, Lighting, Audio, Power Accessories

Body:

Body Panels, Doors, Hood, Trunk, Bumpers, Chassis, Interior Trim, Glass

HVAC:

Air Conditioning System, Heater Core, Blower Motor, Controls

Steering:

Power Steering System, Steering Column, Steering Rack

Procedures Included

Routine Maintenance:

Oil changes, Filter replacements, Fluid checks, Spark plug replacement, Belt inspections

Troubleshooting:

Diagnostic procedures, DTC code explanations, Symptom-based troubleshooting

Engine Repair:

Engine assembly/disassembly, Piston/ring installation, Valve jobs, Turbocharger overhaul, Fuel injector service

Transmission Repair:

Transmission disassembly/reassembly, Gear replacement, Clutch replacement, DCCD unit service

Electrical Diagnostics:

Component testing, Sensor calibration, Wiring harness repair

Suspension And Steering Repair:

Component replacement (shocks, struts, bushings, tie rods), Wheel alignment procedures

Brake System Repair:

Pad and rotor replacement, Caliper service, Bleeding procedures

Technical Depth

Depth:

Comprehensive: From basic fluid services to complete engine and transmission rebuilds, including advanced diagnostics and wiring schematics.

📊 Manual Specifications

File Format

File Type:

Searchable Text:

Yes (typically, dependent on original scan quality)

Print Quality

Resolution:

High-resolution scans, suitable for printing

Readability:

Clear text, legible diagrams, and illustrations

Binding Type

Binding Type:

N/A (Digital Download - PDF)

Paper Type

Paper Type:

N/A (Digital Download - PDF)

⚙️ Engine Specifications

Primary Engine

Engine Code:

EJ257

Engine Type:

2.5L DOHC turbocharged flat-four (boxer)

Performance

Horsepower:

300 hp @ 6000 rpm (JDM/Euro spec), 280 hp @ 5600 rpm (USDM spec)

Torque:

350 lb-ft @ 4000 rpm (JDM/Euro spec), 310 lb-ft @ 3600 rpm (USDM spec)

Bore X Stroke:

99.5 mm x 79.0 mm

Compression Ratio:

8.0:1

Fuel System

Fuel Injection:

Sequential multi-port fuel injection (MPI)

Fuel Type:

Unleaded gasoline (91 octane or higher recommended/required for optimal performance)

Engine Management

ECU Type:

Engine Control Unit (ECU) with specific STI tuning

🔧 Transmission

Standard

Transmission Type:

6-speed manual transmission

Optional

Optional Transmission:

None available for STI models

Features

Dccd System:

Driver Controlled Center Differential (DCCD) with manual and auto modes.

Differential Types:

Front Helical Limited-Slip Differential (LSD), Rear Helical Limited-Slip Differential (LSD)

📐 Dimensions

Exterior

Length:

4,405 mm (173.4 in)

Width:

1,795 mm (70.7 in)

Height:

1,440 mm (56.7 in) (Sedan)

Wheelbase:

2,620 mm (103.1 in)

Front Track:

1,530 mm (60.2 in)

Rear Track:

1,530 mm (60.2 in)

Weights

Curb Weight:

Approx. 1,450 kg (3,197 lbs)

Gross Vehicle Weight Rating:

Approx. 1,830 kg (4,034 lbs)

🛡️ Safety Features

Ratings

NHTSA Front Crash Rating:

4 Stars (Driver and Passenger)

NHTSA Side Impact Rating:

5 Stars (Front and Rear Passengers)

Active Features

Standard Anti-lock Braking System

Traction Control:

Yes (integrated with AWD and DCCD)

Electronic Brake Force Distribution:

Passive Features

Airbags:

Front dual-stage airbags, Front side airbags

Seatbelts:

Pretensioner seatbelts with force limiters

Body Structure:

Reinforced chassis with impact-absorbing crumple zones

💡 Technology Features

Infotainment

Audio System:

Factory CD player with AM/FM radio, often with premium speaker options.

Display:

Basic digital display for climate control and clock.

Driver Assistance

Cruise Control:

Standard electronic cruise control.

Connectivity

Auxiliary Input:

May be present as an aftermarket addition or specific market feature, not a standard factory feature on all units.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,000-5,000 miles or 3-6 months (severe use recommended).

Spark Plug Replacement:

Approx. 30,000 miles (Iridium type)

Timing Belt Replacement:

Not applicable (uses a timing chain)

Coolant Flush Interval:

Every 2 years or 30,000 miles

Fluid Specifications

Engine Oil Type:

SAE 5W-30 Synthetic (API SJ or higher, ILSAC GF-3 or higher)

Engine Oil Capacity:

4.5 US quarts (4.3 Liters) with filter change

Transmission Fluid Type:

Subaru Extra-S (or equivalent GL-5, SAE 75W-90 manual transmission fluid)

Front Differential Fluid Type:

Subaru Extra-S (or equivalent GL-5, SAE 75W-90 gear oil)

Rear Differential Fluid Type:

Subaru Extra-S (or equivalent GL-5, SAE 75W-90 gear oil)

Coolant Type:

Subaru Super Coolant (Blue) or equivalent silicate-free, long-life coolant

Known Issues

Piston Ringland Failure:

Potential for ringland failure on piston #4 under extreme detonation or sustained high-RPM abuse. Regular maintenance and proper fuel are critical.

Clutch Wear:

Clutch wear can be accelerated with aggressive driving. Replacement is a common repair.

Head Gasket Leaks:

While less common than on naturally aspirated EJ engines, head gasket leaks can still occur. Regular cooling system maintenance is advised.

Turbocharger Failure:

Oil starvation or excessive heat can lead to turbocharger failure. Ensure correct oil levels and use of synthetic oil with proper cool-down periods.

Dccd Actuator Failure:

The DCCD actuator can fail over time, leading to a default FWD or AWD mode and illumination of the DCCD warning light.

📚 Vehicle History

Brand Heritage

Motorsport Legacy:

Deep roots in rallying, with the Impreza WRX STI being a direct homologation model for WRC competition.

Model Evolution

Third Gen Introduction:

The 2006 model year represents a significant update within the second generation (GDB/GGB) platform, often referred to as the 'Blobeye' to 'Hawkeye' transition or a mid-cycle refresh for some markets.

Performance Enhancements:

Increased engine power, updated DCCD system, and revised suspension tuning compared to earlier models.

Production

Production Years:

Second Generation (GDB/GGB): 2000-2007. Specifically the 2006 model year.

Manufacturing Locations:

Gunma Plant, Japan

🏆 Awards & Recognition

Recognitions

Rally Prowess:

Consistently recognized as a benchmark for performance and handling in its class, with a strong association with motorsport success.

Ratings

Enthusiast Recognition:

Highly regarded by automotive enthusiasts for its raw performance, AWD grip, and iconic rally heritage.

Certifications

Homologation Status:

Built to homologate the vehicle for World Rally Championship (WRC) competition, ensuring a high level of performance engineering.