🏷️ Basic Information

Make:

Subaru

Model:

WRX

Year Range Covered:

2002-2006

Chassis Codes:

GD, GG

👋 Introduction

Vehicle Segment:

Compact Performance Sedan/Wagon

Target Audience:

Enthusiast drivers, rally sport aficionados, and owners seeking to maintain or modify their vehicle with factory accuracy.

Key Competitors Era:

Mitsubishi Lancer Evolution, Honda Civic Type R, Volkswagen Golf GTI, Ford Focus RS.

Performance Focus:

Renowned for its turbocharged Boxer engine, Symmetrical All-Wheel Drive system, and rally-bred chassis dynamics.

Manual Value Proposition:

Provides the definitive guide to understanding, maintaining, and repairing the WRX, crucial for preserving its performance and longevity.

📋 Manual Details

Coverage Scope:

Comprehensive repair and maintenance for all factory-specified systems and components.

Estimated Page Count:

Approx. 2000+ pages (distributed across multiple volumes/sections).

Manual Type:

Factory Service Manual / Repair Manual

Language:

English

Digital Format:

PDF

📖 Manual Coverage

Engine Mechanical:

Detailed procedures for engine assembly, disassembly, inspection, and repair, including torque specifications, clearances, and wear limits for EJ205 and EJ255 engines.

Engine Performance:

Information on turbocharger systems, intercooling, fuel injection, ignition timing, emissions control, and engine management diagnostics.

Transmission Drivetrain:

Covers manual transmissions (5-speed and 6-speed STI) and all-wheel-drive system (DCCD where applicable) maintenance, repair, and overhaul procedures, including fluid types and capacities.

Suspension Steering:

Detailed instructions for front and rear suspension component replacement, alignment specifications, power steering system service, and wheel bearing replacement.

Brakes:

Comprehensive brake system diagnostics, repair, and maintenance, including ABS systems, brake fluid specifications, caliper, rotor, and pad replacement procedures.

Electrical Electronics:

Extensive wiring diagrams, component locations, diagnostic procedures for lighting, starting/charging, HVAC, body electronics, instrument cluster, and ECU troubleshooting.

Body Chassis:

Body panel removal/installation, interior trim, glass replacement, structural repair guidelines, and chassis component servicing.

Routine Maintenance:

Oil changes, filter replacements, spark plug service, fluid level checks and top-offs, belt inspections, and tire rotations.

Troubleshooting Diagnostics:

Systematic diagnostic charts and procedures for identifying and resolving common and complex issues, including DTC (Diagnostic Trouble Code) interpretation.

Component Replacement:

Step-by-step guides for replacing virtually all major and minor components, from engine parts to interior switches.

Rebuild Procedures:

Detailed instructions for rebuilding engines, transmissions, and other major mechanical assemblies.

Specifications Data:

Provides essential torque values, fluid capacities, part numbers, tolerances, and electrical resistance readings for accurate repairs.

Depth Of Information:

Highly detailed, suitable for professional mechanics and advanced DIY enthusiasts, covering everything from basic adjustments to full engine rebuilds.

📊 Manual Specifications

File Type:

PDF (Portable Document Format)

Printability:

High-resolution images and diagrams allow for clear printing of individual pages or sections without loss of detail.

Digital Binding:

N/A (Digital PDF)

Digital Paper Simulation:

Simulates factory-issue paper quality with sharp text and clear photographic illustrations.

⚙️ Engine Specifications

Engine Code Usdmspec:

EJ255 (2.5L Turbocharged Flat-Four)

Engine Code Jdm Spec:

EJ205 (2.0L Turbocharged Flat-Four) for earlier models or specific markets.

Horsepower Ej255:

230-237 hp @ 5400-5600 rpm (depending on year and specific trim)

Torque Ej255:

235-250 lb-ft @ 3600-4000 rpm (depending on year and specific trim)

Horsepower Ej205:

227 hp @ 5600 rpm

Torque Ej205:

217 lb-ft @ 4000 rpm

Fuel Delivery:

Multi-point Fuel Injection (MPI) with Electronic Throttle Control (ETC).

Fuel Type Recommendation:

Premium Unleaded Gasoline (91 AKI or higher recommended for optimal performance and to prevent detonation).

Turbocharger System:

IHI VF39 or similar twin-scroll turbocharger (depending on year/trim), Air-to-Air Intercooler.

🔧 Transmission

Transmission Type Standard:

5-Speed Manual Transmission (TY754)

Transmission Type Sti:

6-Speed Manual Transmission (TY856) - Standard on STI models.

Drivetrain Layout:

Symmetrical All-Wheel Drive (SAWD) with Viscous Center Differential (VCD) and Driver Controlled Center Differential (DCCD) on STI models.

Clutch Type:

Hydraulically Actuated Single Dry Plate Clutch.

📐 Dimensions

Wheelbase:

104.3 inches (2649 mm)

Overall Length:

173.4 inches (4404 mm)

Overall Width:

69.7 inches (1770 mm)

Overall Height:

58.1 inches (1476 mm)

Curb Weight Sedan:

Approx. 3100-3200 lbs (1406-1451 kg)

Curb Weight Wagon:

Approx. 3100-3300 lbs (1406-1497 kg)

Wheel Bolt Pattern:

5x100mm

Wheel Size:

17x7.0 or 17x8.0 inches (depending on trim)

Tire Size:

215/45R17 or 225/45R17 (depending on trim)

🛡️ Safety Features

NHTSA Front Crash Rating:

4/5 Stars (for 2002-2003 models, variations may exist).

IIHS Ratings:

Good in frontal offset tests for many model years, side impact ratings varied. Refer to IIHS archives for specifics.

Traction Control:

Traction Control System (TCS) available on certain trims/years, Subaru Vehicle Dynamics Control (SVDC) on later models/STI.

ABS:

Anti-lock Braking System (ABS) with Electronic Brake-force Distribution (EBD) standard on most models.

Airbags:

Front dual-stage airbags, front side airbags, and available curtain airbags (depending on year and trim).

Seatbelts:

Three-point height-adjustable front seatbelts with pretensioners and load limiters, three-point rear seatbelts.

💡 Technology Features

Audio System:

Factory-installed CD player with AM/FM stereo, available premium sound systems (e.g., Clarion) on higher trims. Aux input availability varies by year/trim. Manual covers basic radio and speaker diagnostics.

Cruise Control:

Standard electronic cruise control system with steering wheel controls.

Instrument Cluster:

Analog tachometer and speedometer, fuel gauge, coolant temperature gauge, warning lights. Manual provides diagnostic information for the cluster and its sensors.

🔧 Maintenance

Oil Change Interval:

Every 3,750 miles (6,000 km) or 3 months, whichever comes first (severe duty). 7,500 miles (12,000 km) or 6 months (normal duty) recommended by some sources, but consult manual for specific conditions.

Air Filter Replacement:

Every 15,000 miles (24,000 km) or annually.

Spark Plug Replacement:

Every 30,000 miles (48,000 km) for standard plugs, consult manual for specific platinum/iridium recommendations if applicable.

Timing Belt Replacement:

105,000 miles (168,000 km) or 105 months, whichever comes first (for EJ205). For EJ255, check manual, often similar or slightly longer intervals but critical to verify.

Engine Oil Capacity:

Approx. 4.5 US quarts (4.3 liters) with filter change (EJ255). EJ205 slightly less. Verify with manual.

Engine Oil Viscosity:

5W-30 or 10W-30 (synthetic blend or full synthetic recommended, especially for performance driving). Consult manual for exact temperature range recommendations.

Coolant Type:

Subaru Super Coolant (Blue) or equivalent silicate-free, long-life coolant. Capacity approx. 7.1 US quarts (6.7 liters).

Transmission Fluid Type:

75W-90 GL-5 Gear Oil for manual transmission. Capacity approx. 2.0-2.2 US quarts (1.9-2.1 liters). Check manual for specific STI 6-speed requirements.

Differential Fluid Type:

75W-90 GL-5 Gear Oil for front and rear differentials. Capacity approx. 1.0-1.2 US quarts (0.9-1.1 liters) each.

Brake Fluid Type:

DOT 3 or DOT 4 Brake Fluid.

Head Gaskets:

While less prevalent than on naturally aspirated EJ engines, internal oil/coolant leaks related to head gaskets can occur, especially with high mileage or abuse. The manual details inspection and replacement procedures.

Piston Ringlands:

Premature ringland failure can occur on some EJ255 engines, particularly when subjected to aggressive tuning or detonation. Proper fuel and ignition management, as detailed in the manual, is crucial.

Clutch Wear:

Clutch wear is dependent on driving style, but replacement procedures are thoroughly covered. The manual also includes clutch system diagnostics.

Turbocharger Failures:

Turbocharger issues, such as bearing wear or seal leaks, can arise. The manual provides diagnostic steps and rebuilding/replacement guides.

📚 Vehicle History

Subaru Rally Heritage:

Subaru's deep roots in rallying, particularly with the Impreza platform, directly influenced the WRX's development and market appeal.

Gd Gg Generation:

Represents the second generation of the Impreza WRX (GD chassis for sedan, GG for wagon), known for its distinctive 'bug-eye' (early models) to 'hawk-eye' (later models) front fascia redesigns.

Sti Variant:

Introduction of the WRX STI (Subaru Tecnica International) model with a more powerful EJ257 engine (in most markets), 6-speed transmission, DCCD, and upgraded suspension/brakes, solidifying its track and rally heritage.

Production Period:

2000-2007 (for the GD/GG generation, with this manual covering the specific 2002-2006 facelifted models).

Manufacturing Location:

Japan (primarily).

🏆 Awards & Recognition

Car And Driver 10Best:

The Subaru WRX, particularly the STI variant, was frequently recognized on Car and Driver's 10Best lists during this era for its performance and handling.

Rally Championships:

The Impreza WRX platform was the basis for numerous World Rally Championship (WRC) victories for Subaru Rally Team, enhancing the model's credibility and desirability.