2006 SUBARU IMPREZA WRX STI Service & Repair Manual-PDF

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🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2006 Chassis Code: GDB Generation Generation Name: Third Generation (GD/GG chassis, final iteration) Generation Code: GD (Sedan) Codes Engine...

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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:

Chassis Code:

Generation

Generation Name:

Third Generation (GD/GG chassis, final iteration)

Generation Code:

GD (Sedan)

Codes

Engine Code Primary:

EJ257

👋 Introduction

Market Position

Model Segment:

Performance Compact Sedan / Rally Homologation Special

Target Audience:

Enthusiasts, performance drivers, rally fans, mechanics specializing in Subaru vehicles

Competitive Analysis

Key Competitors:

Mitsubishi Lancer Evolution, Ford Focus RS, Volkswagen Golf GTI/R32

Key Features

Distinctive Technologies:

Symmetrical All-Wheel Drive (AWD), Subaru Boxer Engine, Driver Controlled Center Differential (DCCD), performance tuning

Performance Orientation:

Focus on handling, acceleration, and track/rally capability

📋 Manual Details

Coverage Areas

Coverage Type:

Complete Official Service and Repair Manual

Included Engines:

All Engine Variants (explicitly mentions EJ257)

Included Transmissions:

Manual Transmissions (all WRX STI variants)

Trim Levels Covered:

All WRX STI Trim Levels

Page Count

Estimated Page Count:

~2000+

Manual Type

Manual Type:

Factory Service Manual (FSM)

Language

Language:

English

Format

Digital Format:

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Complete overhaul, component testing, timing belt/chain, pistons, rings, bearings, cylinder heads, valve train, lubrication system, cooling system

Engine Performance:

Fuel injection, ignition system, turbocharger, intercooler, exhaust system, emissions control

Transmission:

Manual gearbox overhaul, clutch system, driveshafts, differentials (center, front, rear)

Brakes:

Hydraulic system, ABS, rotor and pad replacement, caliper overhaul, brake lines

Suspension:

Front and rear suspension components, struts, springs, bushings, alignment specifications

Steering:

Power steering system, steering rack, tie rods, wheel alignment

Electrical System:

Battery, charging system, starter, lighting, fuses, relays, wiring diagrams, diagnostic trouble codes (DTCs)

Climate Control:

HVAC system, A/C service, heater core, blower motor

Body And Interior:

Body panel removal and installation, door mechanisms, interior trim, seat removal

Safety Systems:

Airbag system, seatbelt mechanisms

Procedures Included

Routine Maintenance:

Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection/replacement

Troubleshooting:

Diagnostic procedures, symptom-based troubleshooting, fault code diagnosis

Repair And Rebuild:

Complete engine rebuild, transmission overhaul, suspension component replacement, brake system repair

Diagnostics:

OBD-II diagnostics, sensor testing, actuator testing, ECU functionality

Wiring Diagrams:

Comprehensive electrical schematics for all systems

Specifications And Tolerances:

Torque values, clearances, fluid capacities, performance specs

Technical Depth

Depth Of Coverage:

Factory-level repair and diagnostic procedures, suitable for professional technicians and advanced DIYers

Diagnostic Tools Required:

Mention of Subaru Select Monitor (SSM) or equivalent diagnostic tools for advanced diagnostics

📊 Manual Specifications

File Format

File Type:

Searchability:

Likely text-searchable (standard for official PDFs)

Print Quality

Image Resolution:

High resolution, suitable for printing diagrams and illustrations

Binding Type

Binding:

N/A (Digital PDF)

Paper Type

Paper Quality:

N/A (Digital PDF)

⚙️ Engine Specifications

Primary Engine

Engine Family:

EJ Series Boxer

Engine Code:

EJ257

Engine Type:

2.5L Flat-4 Turbocharged DOHC 16-Valve

Bore X Stroke:

99.5 mm x 79.0 mm

Compression Ratio:

8.2:1

Displacement Cc:

Performance

Horsepower Ps:

280 PS @ 5600 rpm (approx. European Spec)

Horsepower Hp:

276 hp @ 5600 rpm (approx. US Spec)

Torque Nm:

392 Nm @ 3600 rpm (approx. European Spec)

Torque Lb-Ft:

290 lb-ft @ 3600 rpm (approx. US Spec)

Fuel System

Fuel Delivery:

Multi-point Fuel Injection (MPI)

Turbocharger:

IHI VF37 (or similar twin-scroll)

Intercooler Type:

Air-to-Air Top-Mount Intercooler

Fuel Type:

Unleaded Gasoline (95 RON / 91 Octane minimum recommended)

🔧 Transmission

Standard

Transmission Type:

6-Speed Manual (TY856WR1AA)

Optional

Optional Transmission:

None for WRX STI trim

Features

Dccd:

Driver Controlled Center Differential (Manual adjustment)

Differentials:

Front Helical LSD, Rear Viscous LSD

📐 Dimensions

Exterior

Wheelbase Mm:

Length Mm:

Width Mm:

Height Mm:

Ground Clearance Mm:

Wheel Bolt Pattern:

5x114.3

Standard Wheel Size:

18x8.5

Standard Tire Size:

225/40R18

Weights

Curb Weight Kg:

Gross Vehicle Weight Rating Kg:

Towing Capacity Kg:

Not Recommended

🛡️ Safety Features

Ratings

NHTSA Frontal Impact Driver:

5-Star (2006 Model Year Rating)

NHTSA Frontal Impact Passenger:

5-Star (2006 Model Year Rating)

NHTSA Side Impact Front Driver:

5-Star (2006 Model Year Rating)

NHTSA Side Impact Front Passenger:

5-Star (2006 Model Year Rating)

NHTSA Side Impact Rear Driver:

4-Star (2006 Model Year Rating)

NHTSA Side Impact Rear Passenger:

4-Star (2006 Model Year Rating)

NHTSA Rollover:

4-Star (2006 Model Year Rating)

Active Features

Standard (4-wheel disc brakes with ABS)

Traction Control:

Standard (SI-DRIVE and AWD system contribute)

Electronic Stability Control:

Standard (Vehicle Dynamics Control - VDC)

Passive Features

Airbags:

Front airbags, Side curtain airbags, Front side airbags

Seatbelts:

Front and rear three-point seatbelts, Pre-tensioners, Force limiters

💡 Technology Features

Infotainment

Head Unit Features:

Factory single-DIN or double-DIN CD/Radio with optional premium sound system. Limited advanced features by modern standards.

Driver Assistance

Active Safety Systems:

ABS, VDC (Vehicle Dynamics Control), DCCD (Driver Controlled Center Differential)

Performance Modes:

SI-DRIVE (Subaru Intelligent Drive) potentially included on some models, offering distinct engine/transmission mapping modes.

Connectivity

Connectivity Features:

Basic (CD player, potentially auxiliary input on some later units). No Bluetooth or USB as standard.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,000-5,000 miles or 3-6 months (severe use recommended for performance driving)

Air Filter Replacement:

Every 15,000-30,000 miles or annually

Spark Plug Replacement:

Every 30,000-60,000 miles (dependent on plug type, iridium recommended)

Timing Belt Replacement:

Not applicable for EJ257 (uses timing chain)

Coolant Flush:

Every 30,000 miles or 2 years

Brake Fluid Flush:

Every 2 years or 30,000 miles

Fluid Specifications

Engine Oil Type:

SAE 5W-30 Synthetic (API SN or higher)

Engine Oil Capacity Liters:

4.5 L (with filter)

Coolant Type:

Subaru Super Coolant (Blue) or equivalent

Transmission Fluid Type:

API GL-5, SAE 75W-90 (Manual Transmission)

Differential Fluid Type:

API GL-5, SAE 75W-90 (Front and Rear)

Brake Fluid Type:

DOT 3 or DOT 4

Known Issues

Engine Ringland Failure:

Common failure mode in EJ257 engines due to detonation; regular quality fuel and proper tuning are crucial. Manual covers diagnosis and repair.

Clutch Wear:

Can wear prematurely with aggressive driving. Manual details clutch inspection and replacement.

Turbo Failure:

Can occur due to lack of lubrication or oil breakdown. Manual covers turbo diagnosis and replacement.

Suspension Component Wear:

Bushings and struts can wear over time. Manual provides replacement procedures and alignment specs.

Oil Consumption:

Can be an issue with higher mileage engines. Manual details checks and potential causes.

📚 Vehicle History

Brand Heritage

Subaru Rally History:

Rich heritage in WRC (World Rally Championship), heavily influencing Impreza WRX STI development

Model Evolution

Impreza Wrx Sti Lineage:

Evolution from Group A rally homologation specials to iconic performance sedans

Third Generation Introduction:

Introduced for the 2002 model year in Japan, WRX STI variant followed, significant redesign for 2006 model year (chassis code GD/GG)

Production

Production Location:

Japan (Gunma Plant)

Production Period:

2000-2007 (GD/GG chassis), 2006 model year is part of the facelifted version of this generation.

🏆 Awards & Recognition

Recognitions

Sport Compact Of The Year:

Frequently recognized by automotive publications for its performance and handling capabilities.

Rally Pedigree:

Directly benefits from Subaru's extensive rally heritage and success.