2005 SUBARU IMPREZA WRX STI Service Repair Manual

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🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2005 Generation Generation Code: GD/GG Generation Designation: Second Generation (GDB/GGB for STI) 👋 Introduction Market Position Segment: Performance Compact...

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标签: 2005 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:

GD/GG

Generation Designation:

Second Generation (GDB/GGB for STI)

👋 Introduction

Market Position

Segment:

Performance Compact Sedan/Wagon

Target Audience:

Enthusiasts, performance car owners, DIY mechanics, professional technicians

Competitive Analysis

Competitors:

Mitsubishi Lancer Evolution, Subaru WRX (base model), Mitsubishi Eclipse GT, Ford Focus SVT

Key Features

Differentiating Features:

Symmetrical All-Wheel Drive, turbocharged Boxer engine, rally heritage, Driver Controlled Centre Differential (DCCD) on STI models

Value Proposition

Manual Value:

Provides authoritative, factory-level repair and maintenance information for accurate and efficient servicing of the 2005 Impreza WRX STI.

📋 Manual Details

Coverage Areas

Model Variants Covered:

RS, WRX STi, WRX Sport, Hatchback

Engine Variants Covered:

2.5L H4 (EJ257 for STI), 2.0L H4 (EJ205 for WRX)

Page Count

Estimated Page Count:

Approximately 3000+ pages (typical for comprehensive factory service manuals)

Manual Type

Type:

Factory Service Repair Manual (Digital)

Language

Language:

English

Format

Format:

Digital (likely PDF)

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Engine assembly, disassembly, overhaul, cylinder head, piston, crankshaft, camshafts, timing belt/chain, lubrication system, cooling system

Engine Performance:

Fuel injection, ignition system, turbocharging, intercooler system, emission control systems

Transmission Drivetrain:

Manual transmission (TY757 for STI, TY756 for WRX), clutch system, all-wheel drive system (DCCD for STI), driveshafts, differentials

Suspension:

Front suspension (MacPherson strut), rear suspension (Multi-link), steering system, shock absorbers, springs

Brakes:

Brake system components (calipers, rotors, master cylinder, ABS), hydraulic system, parking brake

Electrical:

Wiring diagrams, battery, alternator, starter, lighting system, audio system, power windows, security system

Body Exterior:

Body panel removal/installation, doors, hood, trunk, bumpers, glass, trim

Body Interior:

Dashboard, seats, interior trim, HVAC system, airbags

Dccd System:

Specific procedures for diagnosing and servicing the Driver Controlled Centre Differential (DCCD) system on STI models.

Turbocharger System:

Detailed inspection, repair, and replacement procedures for the turbocharger and associated plumbing.

HVAC System:

Diagnosis and repair of the heating, ventilation, and air conditioning system, including refrigerant handling and component replacement.

Fuel System Diagnostics:

Procedures for testing fuel pump pressure, injector flow rates, and diagnosing fuel delivery issues.

Procedures Included

Maintenance:

Scheduled maintenance, oil changes, filter replacements, fluid checks and top-offs, tune-ups

Troubleshooting:

Diagnostic procedures, symptom charts, fault code interpretation, common problems and solutions

Repair:

Detailed step-by-step repair instructions for all major systems and components

Diagnostics:

OBD-II system diagnostics, sensor testing, actuator testing

Specifications:

Torque specifications, clearances, fluid capacities, electrical resistance values

Wiring Diagrams:

Detailed electrical wiring schematics for all vehicle systems, aiding in diagnostic and repair of electrical faults.

Torque Specifications:

Precise torque values for all critical fasteners, ensuring proper assembly and preventing component damage.

Wheel Alignment:

Specifications and procedures for performing wheel alignment adjustments.

Body And Frame:

Information on body repairs, frame alignment, and corrosion prevention.

Technical Depth

Depth:

Comprehensive, from basic maintenance to complete engine and transmission rebuilds, advanced diagnostics

Diagnostic Tools:

Information on using Subaru's diagnostic tools (e.g., Subaru Select Monitor) and common scan tools.

Rebuild Procedures:

Step-by-step instructions for complete engine and transmission rebuilds, including part specifications and assembly sequences.

📊 Manual Specifications

File Format

File Type:

PDF (Portable Document Format)

Searchability:

Searchable text for quick information retrieval

Print Quality

Print Readability:

High-resolution, clear diagrams and text suitable for printing

Binding Type

Binding:

Not Applicable (Digital Format)

Paper Type

Paper Quality:

Not Applicable (Digital Format)

⚙️ Engine Specifications

Primary Engine

Engine Code Sti:

EJ257

Engine Type Sti:

2.5L turbocharged horizontally-opposed (Boxer) 4-cylinder

Engine Code Wrx:

EJ205

Engine Type Wrx:

2.0L turbocharged horizontally-opposed (Boxer) 4-cylinder

Performance Sti

Horsepower Sti:

300 hp @ 6000 rpm (SAE Net)

Torque Sti:

300 lb-ft @ 4000 rpm (SAE Net)

Performance Wrx

Horsepower Wrx:

227 hp @ 5600 rpm (SAE Net)

Torque Wrx:

251 lb-ft @ 3200 rpm (SAE Net)

Fuel System

Fuel Delivery:

Sequential Multi-Port Fuel Injection (MPI)

Fuel Type:

Unleaded gasoline, premium (91 octane or higher recommended)

🔧 Transmission

Standard

Transmission Type:

6-speed manual transmission

Transmission Code Sti:

TY757

Transmission Code Wrx:

TY756

Optional

Transmission Type Optional:

None (STI and WRX were manual only for this generation)

Features

All Wheel Drive System:

Symmetrical All-Wheel Drive with Driver Controlled Centre Differential (DCCD) on STI models

Clutch Type:

Hydraulically operated, single dry plate clutch

📐 Dimensions

Exterior

Length:

Approximately 173.8 inches (4415 mm)

Width:

Approximately 69.7 inches (1770 mm)

Height:

Approximately 56.1 inches (1425 mm)

Weights

Curb Weight Sti:

Approximately 3240 lbs (1470 kg)

Curb Weight Wrx:

Approximately 3150 lbs (1430 kg)

Wheelbase:

Approximately 104.9 inches (2665 mm)

🛡️ Safety Features

Ratings

NHTSA Front Impact Driver:

Not Available (specific rating for 2005 model year might vary)

NHTSA Front Impact Passenger:

Not Available (specific rating for 2005 model year might vary)

IIHS Front Offset Small Overlap:

Not Available (IIHS testing protocols evolved)

Active Features

Standard Anti-lock Braking System

Traction Control:

Standard Traction Control System (TCS)

Electronic Stability Control:

Optional (VDC - Vehicle Dynamics Control on some trims/models)

Passive Features

Airbags Front:

Driver and front passenger airbags

Airbags Side:

Optional front side-impact airbags

Airbags Curtain:

Optional side-curtain airbags

💡 Technology Features

Infotainment

Audio System:

Factory AM/FM/CD player, optional premium audio system with amplifier and subwoofer.

Display:

Basic LCD display for clock, radio, and climate control settings.

Driver Assistance

Cruise Control:

Standard cruise control

Connectivity

Auxiliary Input:

Optional auxiliary input jack for external audio sources (may require specific adapter).

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,750 miles (6,000 km) or 3 months, whichever comes first (under severe driving conditions); 7,500 miles (12,000 km) or 6 months in normal conditions. Consult manual for specifics.

Engine Oil Filter Replacement:

At every oil change

Timing Belt Replacement:

Refer to manual (typically around 90,000-105,000 miles or 7 years for EJ engines with timing belts). Check if your specific model has a belt or chain.

Fluid Specifications

Engine Oil Type:

SAE 5W-30 Synthetic (API SG or higher). Consult manual for specific approvals.

Engine Oil Capacity:

Approximately 4.8 US quarts (4.5 liters) with filter.

Coolant Type:

Subaru Super Coolant (Blue) or equivalent ethylene glycol-based coolant with Subaru anti-corrosion additive.

Transmission Fluid Type:

GL-4 (75W-90) for manual transmission. Check manual for specific Subaru fluid part numbers (e.g., Subaru Extra-S or equivalent).

Differentials Fluid Type:

GL-5 (75W-90) for front and rear differentials. Check manual for specific Subaru fluid part numbers.

Known Issues

Piston Ring Land Cracking:

A known potential issue with EJ257 engines, especially when modified or subjected to harsh driving, leading to oil consumption or engine failure.

Clutch Wear:

Can be accelerated by aggressive driving styles.

Throttle Body Issues:

Idle control issues or stumbling can occur due to carbon buildup or sensor faults.

Head Gasket Leaks:

While less common on EJ257 compared to earlier EJ25s, it's still a potential area for concern.

📚 Vehicle History

Brand Heritage

Subaru Rally Heritage:

Subaru's rich history in the World Rally Championship (WRC) heavily influenced the development and performance of the Impreza WRX STI.

Model Evolution

Impreza Debut:

The Impreza line debuted in 1992, with performance WRX and STI variants introduced shortly after.

Gd Gg Generation:

The GD/GG generation (2002-2007) saw significant design changes and performance enhancements, with the 2005 model receiving a facelift and powertrain updates.

Production

Production Location:

Ota City, Gunma Prefecture, Japan

🏆 Awards & Recognition

Recognitions

Performance Acclaim:

Consistently praised by automotive press for its rally-bred performance, handling, and all-wheel-drive capabilities.

Ratings

Car And Driver Best 10:

The Impreza WRX and STI models have frequently appeared on Car and Driver's '10Best' lists in various years.