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 Primary: EJ257 👋 Introduction Market Position Positioning: Iconic rally-bred performance sedan, renowned...

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Type: Car

Vendor:

Sku: 364554

Tags: 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 Primary:

EJ257

👋 Introduction

Market Position

Positioning:

Iconic rally-bred performance sedan, renowned for its AWD system and turbocharged engine

Competitive Analysis

Competitors:

Mitsubishi Lancer Evolution, Subaru WRX (standard model)

Key Features Vehicle

Differentiating Features:

Symmetrical All-Wheel Drive, Driver Controlled Center Differential (DCCD), Active Torque Split, turbocharged Boxer engine, strong aftermarket support

Manual Purpose

Purpose:

To provide comprehensive diagnostic, repair, and maintenance information for the 2006 Subaru Impreza WRX STI

Target Audience

Audience:

Subaru WRX STI owners, independent repair shops, automotive technicians

📋 Manual Details

Coverage Areas

Manual Type:

Workshop Service Repair Manual

Language:

English

Format:

Downloadable PDF

Completeness:

Complete Factory Official Service Information

Page Count

Estimated Pages:

Hundreds

📖 Manual Coverage

Systems Covered

Engine:

Engine mechanical, lubrication, cooling, fuel, ignition, emissions control, turbocharging system

Transmission:

Manual transmission (TY856WR) diagnosis, overhaul, and adjustment

Drivetrain:

All-Wheel Drive (AWD) system, center differential, front and rear differentials, drive shafts, CV joints

Suspension:

Front and rear suspension components, geometry, alignment, shock absorbers, springs, bushings

Brakes:

Brake system hydraulics, ABS (Anti-lock Braking System), rotors, calipers, pads, parking brake

Steering:

Power steering system, steering rack, tie rods, steering column

Electrical:

Battery, charging system, starter, lighting, wipers, horn, power windows, central locking, ECUs

Body:

Body construction, panels, doors, windows, bumpers, interior trim, exterior trim, chassis repair

HVAC:

Heating, Ventilation, and Air Conditioning (HVAC) system diagnosis and repair

Comfort Convenience:

Seats, airbags, seatbelts, audio system, climate control controls

Procedures Included

Maintenance:

Scheduled maintenance tasks, fluid changes, filter replacements, belt inspections

Diagnostics:

Troubleshooting guides, diagnostic trouble codes (DTCs), symptom-based diagnostics

Repair:

Component removal, installation, and repair procedures for all major systems

Overhaul:

Detailed step-by-step instructions for engine and transmission overhauls

Adjustment:

Torque specifications, clearances, alignment settings, clutch adjustments

Wiring Diagrams:

Comprehensive electrical wiring diagrams for all vehicle systems

Technical Depth

Depth:

Full factory level detail, suitable for professional technicians and advanced DIY enthusiasts

Special Tools:

Identification and usage of specialized tools required for specific procedures

📊 Manual Specifications

File Format

File Type:

PDF (Portable Document Format)

Searchability:

Searchable text content for quick information retrieval

Print Quality

Printability:

Designed for printing, allowing users to print specific sections or the entire manual

Binding Type

Binding Type Physical:

N/A (Digital Download)

Paper Type

Paper Type Physical:

N/A (Digital Download)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Horizontally Opposed (Boxer), 4-cylinder, turbocharged, intercooled

Displacement:

2.5 Liters (2457 cc)

Bore X Stroke:

99.5 mm x 80.0 mm

Compression Ratio:

8.0:1

Performance

Horsepower SAE Net:

300 hp @ 6000 rpm

Torque SAE Net:

290 lb-ft @ 4000 rpm

Fuel System

Fuel Delivery:

Multi-point fuel injection (MPI) with electronic throttle control

Fuel Type:

Premium Unleaded Gasoline (91 octane or higher recommended)

Turbocharging

Turbocharger Model:

IHI VF39

Intercooler Type:

Top-mounted air-to-air intercooler

Engine Management

ECU Type:

Engine Control Unit (ECU) with specific STI tuning

🔧 Transmission

Standard

Transmission Type:

6-speed manual transaxle (TY856WR)

Features

Dccd:

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

Clutch Type:

Hydraulically actuated, multi-plate clutch

Fluid Specs

Transmission Fluid Type:

Subaru Extra-S Gear Oil (or equivalent API GL-5, SAE 75W-90)

Fluid Capacity

Transmission Fluid Capacity:

2.4 Liters (approx.)

📐 Dimensions

Exterior

Length:

4415 mm (173.8 in)

Width:

1750 mm (68.9 in)

Height:

1420 mm (55.9 in)

Wheelbase:

2625 mm (103.3 in)

Weights

Curb Weight:

1505 kg (3318 lbs)

Gross Weight Rating:

1950 kg (4299 lbs)

🛡️ Safety Features

Ratings

NHTSA Front Impact:

5-star

NHTSA Side Impact:

4-star

Active Features

Standard Anti-lock Braking System (ABS) with EBD (Electronic Brakeforce Distribution)

Symmetrical All-Wheel Drive (AWD) with DCCD

Passive Features

Airbags:

Driver and front passenger airbags, front side-impact airbags

Seatbelts:

3-point seatbelts with pretensioners and load limiters, LATCH child seat anchors

Body Structure:

Reinforced chassis and safety cage construction

💡 Technology Features

Infotainment

Infotainment System:

Base audio system with CD player, AM/FM radio. Options may include upgraded speakers or amplifier.

Driver Assistance

Driver Assistance Features:

ABS, EBD, AWD, DCCD. No modern electronic driver aids like stability control or traction control beyond mechanical systems.

Connectivity

Connectivity Features:

Basic audio connectivity (e.g., auxiliary input might be present depending on trim).

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,750 miles or 6 months (severe driving conditions) or 7,500 miles or 12 months (normal driving conditions)

Air Filter Replacement:

Every 15,000 miles or 12 months

Cabin Air Filter Replacement:

Every 15,000 miles or 12 months

Spark Plug Replacement:

Every 30,000 miles (platinum-tipped)

Timing Belt Replacement:

Every 105,000 miles or 105 months (timing belt driven engine)

Fluid Specifications

Engine Oil Type:

SAE 0W-30 or 5W-30 Synthetic (API SN or higher, ILSAC GF-5 or higher)

Engine Oil Capacity:

4.8 Liters (5.1 US quarts) with filter change

Coolant Type:

Subaru Super Coolant (Blue) or equivalent ethylene glycol based coolant

Brake Fluid Type:

DOT 3 or DOT 4

Known Issues

Common Issues Engine:

Piston ring land failure (ringland failure) leading to compression loss, head gasket leaks, turbocharger failure (especially if oil maintenance is neglected), fuel injector clogging.

Common Issues Suspension:

Worn suspension bushings (especially control arm bushings), strut wear.

Common Issues Clutch:

Clutch wear and potential failure, especially with aggressive driving.

📚 Vehicle History

Brand Heritage

Brand Heritage Summary:

Subaru, known for its Boxer engines and Symmetrical All-Wheel Drive, has a strong heritage in motorsports, particularly rallying.

Model Evolution

Generation Code:

GDB (Third Generation Impreza)

Performance Heritage:

The WRX STI nameplate is directly derived from Subaru's World Rally Championship (WRC) success.

Production

Production Years Model:

2006-2007 (for this specific generation update)

Manufacturing Location:

Gunma Plant, Japan

🏆 Awards & Recognition

Recognitions

Award Type:

Car and Driver's 10Best (The Impreza line, including WRX variants, has been a frequent recipient of this award in various iterations).

Award Context:

Recognized for performance, handling, and value in its class.

Ratings

Rating Source:

Various automotive publications and enthusiast communities

Performance Rating:

Highly acclaimed for its rally-inspired performance and all-weather capability.