Subaru Impreza WRX-STI Service Repair Manual

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🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Product Type: Service Repair Manual Codes Subaru Model Codes: GDA, GDB, GRB, GVB, VAB 👋 Introduction Market Position Positioning: Performance-oriented...

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Sku: 303089

Tags: Car Cars Impreza WRX-STI Misc Subaru

Product variants

Description

🏷️ Basic Information

Identification

Make:

Subaru

Model:

Impreza WRX STI

Product Type:

Service Repair Manual

Codes

Subaru Model Codes:

GDA, GDB, GRB, GVB, VAB

👋 Introduction

Market Position

Positioning:

Performance-oriented compact sedan/hatchback, rallying heritage, enthusiast-driven vehicle

Competitive Analysis

Competitors:

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

Key Features

Performance Focus:

Symmetrical All-Wheel Drive, turbocharged boxer engines, performance-tuned suspension

Driving Dynamics:

Legendary handling, driver feedback, rally-bred DNA

📋 Manual Details

Coverage Areas

Engine Coverage:

EJ207, EJ255, EJ257, EJ204 (NA variants for context, though STI focus is forced induction)

Transmission Coverage:

5-speed Manual (GD chassis), 6-speed Manual (GR/GV/VA chassis), DCCD (Driver Controlled Center Differential) system

Chassis Coverage:

All chassis variants associated with WRX STI (e.g., GD, GG, GR, GV, GE, GH, VAB)

Electrical Systems:

Engine management, lighting, instrumentation, infotainment, power accessories, ABS, SRS (Airbag)

Body And Interior:

Body panels, doors, windows, seats, trim, climate control, safety restraints

Page Count

Estimated Pages:

1500+

Manual Type

Type:

Comprehensive Factory Service Manual / Repair Manual

Language

Language:

English

Format

Format:

Digital (PDF)

📖 Manual Coverage

Systems Covered

Powertrain:

Engine, Turbocharger, Intercooler, Fuel System, Ignition System, Exhaust System, Cooling System, Lubrication System

Drivetrain:

Manual Transmission, Clutch, Differential (Front, Center, Rear), Driveshafts, Axles, AWD System

Suspension And Steering:

Front & Rear Suspension, Shock Absorbers, Springs, Control Arms, Sway Bars, Power Steering System, Steering Column

Brakes:

Hydraulic System, ABS, Brake Lines, Calipers, Rotors, Pads, Parking Brake

Wheel And Tires:

Wheel specifications, Tire pressure, Mounting procedures, Alignment specifications

Procedures Included

Maintenance:

Scheduled maintenance, Oil changes, Filter replacements, Spark plug replacement, Belt inspection/replacement

Diagnostics:

Troubleshooting guides, Symptom-based diagnostics, DTC (Diagnostic Trouble Code) interpretation, Wiring diagrams

Repair:

Component removal/installation, Major overhauls, Component-specific repair procedures

Rebuilding:

Engine rebuild procedures, Transmission rebuild, Differential rebuild

Calibration:

Steering angle sensor, ABS module, Clutch system bleeding

Technical Depth

Depth:

Factory-level diagnostic and repair information, suitable for professional technicians and advanced DIY enthusiasts

Detail Level:

Detailed torque specifications, clearance measurements, diagnostic flowcharts, wiring schematics

📊 Manual Specifications

File Format

PDF Quality:

High-resolution, searchable text, bookmark navigation

Printability:

Printable pages for workshop use

Binding Type

Binding:

N/A (Digital PDF)

Paper Type

Paper:

N/A (Digital PDF)

⚙️ Engine Specifications

Primary Engine

Engine Code Common:

EJ257 (2.5L Turbocharged Boxer)

Engine Layout:

Horizontally-opposed (Boxer)

Displacement Common:

2.5 Liters (2457cc)

Induction:

Turbocharged with Top-Mount Intercooler

Valve Train:

DOHC (Double Overhead Camshafts), 16 Valves

Performance

Horsepower Range:

Approx. 300-320 HP (depending on generation and specific market)

Torque Range:

Approx. 300-330 lb-ft (depending on generation and specific market)

Fuel System

Fuel Delivery:

Sequential Multi-Point Fuel Injection (MPI)

Fuel Type Recommended:

Premium Unleaded Gasoline (91+ Octane)

Engine Management

ECU Type:

Engine Control Unit (ECU) with integrated Immobilizer and potentially other vehicle control modules

🔧 Transmission

Standard

Type Common:

6-speed Manual Transmission (TY856WR).

Optional

Type Older:

5-speed Manual Transmission (TY754)

Features

Dccd:

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

Fluid Specs

Gear Oil Spec:

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

Gear Ratios

Ratio Example:

Specific ratios vary by generation; consult manual for exact ratios (e.g., 1st Gear: 3.636)

📐 Dimensions

Exterior

Length Example:

Approx. 4415 mm (GD Hatchback) to 4600 mm (GV Sedan) - Varies by generation and body style

Width Example:

Approx. 1770 mm (GD) to 1795 mm (GR/GV/VA) - Varies by generation

Height Example:

Approx. 1440 mm (GD) to 1475 mm (GR/GV/VA) - Varies by generation

Wheelbase Example:

Approx. 2525 mm (GD) to 2625 mm (GR/GV/VA) - Varies by generation

Weights

Curb Weight Example:

Approx. 1470 kg (GD) to 1500+ kg (GR/GV/VA) - Varies by generation and trim

Gross Vehicle Weight Rating Example:

Consult vehicle placard; typically around 1950 kg

🛡️ Safety Features

Ratings

NHTSA Ratings Example:

Typically 5-Star NHTSA ratings for frontal and side impacts for relevant model years (check specific year)

IIHS Ratings Example:

Good ratings in various IIHS tests for relevant model years (check specific year)

Active Features

AWD System:

Subaru Symmetrical All-Wheel Drive (AWD) with Driver Controlled Center Differential (DCCD)

Anti-lock Braking System (ABS)

Traction Control:

Vehicle Dynamics Control (VDC) / Traction Control System (TCS)

Passive Features

Airbags:

Driver and Passenger Frontal Airbags, Side Curtain Airbags, Front Side Airbags (depending on generation)

Seatbelts:

3-point ELR Seatbelts with pretensioners and force limiters

Body Structure:

High-tensile steel body structure, front and rear crumple zones

💡 Technology Features

Infotainment

Head Unit Features:

CD player, AM/FM radio, Bluetooth connectivity (later models), USB input, touch screen display (later models)

Audio System Options:

Harman Kardon audio system (optional on some trims)

Driver Assistance

Cruise Control:

Standard cruise control

Eyesight System:

Subaru EyeSight driver assist technology available on later generations (pre-collision braking, adaptive cruise control, lane departure warning - typically not on STI models from factory)

Connectivity

Bluetooth:

Available for hands-free calling and audio streaming on later models

Performance Tech

Si Drive:

Subaru Intelligent Drive (SI-DRIVE) with Intelligent, Sport, and Sport Sharp modes to adjust throttle response and engine mapping

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,000-7,500 miles or 6-12 months (severe use recommended every 3,000 miles)

Spark Plug Interval:

Approx. 60,000 miles (iridium plugs)

Timing Belt Interval:

Not applicable for EJ series (uses timing chain or timing belt depending on specific EJ variant; EJ257 uses a belt, typically 105,000 miles or 7 years)

Coolant Flush Interval:

Every 2-4 years or 30,000-60,000 miles

Fluid Specifications

Engine Oil Spec:

0W-30 or 5W-30 Synthetic (API SN or higher, ILSAC GF-5 or higher). Consult manual for specific grade.

Coolant Spec:

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

Brake Fluid Spec:

DOT 3 or DOT 4 Brake Fluid

Known Issues

Engine Potential Issues:

Ringland failure, piston land failure (particularly on modified engines or with poor tuning), turbocharger wear, oil consumption

Clutch Wear:

Can be accelerated with aggressive driving; dual-mass flywheel can wear

Suspension Components:

Sway bar links and bushings can wear over time, leading to clunks

Electrical Gremlins:

Occasional issues with sensors, wiring harness integrity (especially around turbocharger)

Part Numbers Example

Oil Filter Part No:

15208AA100 (or equivalent with correct thread pitch and bypass valve)

📚 Vehicle History

Brand Heritage

Motorsport Roots:

Deep roots in World Rally Championship (WRC) success, influencing the STI's development

Model Evolution

Generations:

GDA/GDB (2000-2007), GR/GV/GE/GH (2007-2014), VAB (2014-2021)

Key Updates:

Introduction of 6-speed gearbox, new chassis (GR/GV), EJ257 engine adoption, DCCD enhancements, electronic throttle control

Production

Manufacturing Location:

Gunma Manufacturing Plant, Japan

🏆 Awards & Recognition

Recognitions

Car And Driver ப்படுவத:

Frequently appeared on Car and Driver's 10Best list in its respective years

Motor Trend Awards:

Often recognized by MotorTrend for its performance and handling capabilities

Ratings

Enthusiast Reviews:

Consistently highly rated by automotive journalists and enthusiasts for its driving dynamics and performance-to-price ratio