🏷️ Basic Information

Make:

Subaru

Model:

Impreza WRX

Year:

2005

Chassis Code:

GDB

👋 Introduction

Segment:

Compact performance sedan/hatchback.

Usp:

All-wheel-drive performance, turbocharged boxer engine, rally-inspired heritage.

Key Competitors 2005:

Mitsubishi Lancer Evolution, Honda Civic Si, Volkswagen GTI, Ford Focus SVT.

Driving Dynamics:

Symmetrical All-Wheel Drive system provides exceptional traction and handling. Low center of gravity from boxer engine contributes to stability.

Performance Focus:

Designed for enthusiasts with a potent turbocharged engine and sport-tuned suspension.

📋 Manual Details

Comprehensive Coverage:

Yes, covers all aspects of the vehicle.

Estimated Pages:

Hundreds (specific count not provided, but implies comprehensive detail).

Type:

Factory Service Repair Manual

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine Mechanical:

Engine assembly, disassembly, diagnosis, repair, torque specifications, timing belt replacement, piston and rod assembly, cylinder head repair, crankshaft and bearing installation, oil pump and system, cooling system, lubrication system, fuel injection system.

Engine Performance:

Turbocharger operation and diagnosis, intercooler system, emissions control systems, ECU diagnostics and related sensors.

Transmission Drivetrain:

Manual transmission (5-speed TY754VB1CA/AB/AC), clutch system diagnosis and repair, driveshaft, differential (front and rear), axle shafts, wheel bearings.

Suspension Steering:

Front and rear suspension systems (independent MacPherson strut front, independent multi-link rear), steering system components, power steering system, alignment specifications, shock absorber and spring replacement.

Brakes:

Front and rear brake systems (ventilated front discs, solid rear discs), ABS system diagnosis and repair, brake fluid specifications, brake pad and rotor replacement, hydraulic system bleeding.

Electrical Electronics:

Wiring diagrams, fuse box locations and identification, charging system (alternator, battery), starting system (starter motor), ignition system, lighting system, instrument panel and gauges, power windows, power locks, audio system, ECU pinouts, sensor diagnostics.

Body Chassis:

Body panel removal and installation, interior trim, door hardware, bumpers, glass replacement, chassis specifications, jacking points, frame alignment.

HVAC:

Heating, ventilation, and air conditioning system diagnosis and repair, refrigerant handling, compressor, condenser, evaporator, blower motor.

Routine Maintenance:

Oil and filter change, air filter replacement, spark plug replacement, fuel filter replacement, coolant flush and refill, brake fluid flush, transmission fluid change.

Diagnostic Troubleshooting:

System-specific diagnostic charts, symptom-based troubleshooting, fault code interpretation (OBD-II).

Repair Rebuild:

Detailed step-by-step instructions for major component disassembly, repair, and reassembly of engine, transmission, suspension, brakes, and electrical systems.

Installation Replacement:

Procedures for replacing common wear items and optional equipment.

Depth:

Comprehensive, suitable for professional technicians and experienced DIY enthusiasts. Includes detailed torque specs, clearances, and diagnostic procedures.

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely searchable text within the PDF, enabling quick access to specific topics.

Printability:

Designed to be printable, allowing users to create physical copies of relevant sections or the entire manual.

Binding Preference For Print:

If printed, a comb binding or three-ring binder would be ideal for ease of use and page turning.

Paper Recommendation For Print:

Standard printer paper (20-24 lb) is suitable.

⚙️ Engine Specifications

Engine Code:

EJ255

Engine Type:

2.5L Turbocharged Boxer 4-Cylinder

Bore X Stroke:

99.5 mm x 79.0 mm

Compression Ratio:

8.4:1

Horsepower:

227 hp @ 5600 rpm

Torque:

236 lb-ft @ 3200 rpm

Fuel Delivery:

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

Recommended Fuel:

Premium Unleaded (91 Octane or higher)

Turbocharger Model:

IHI VF39

Intercooler Type:

Top-mount Air-to-Air Intercooler

🔧 Transmission

Type:

5-Speed Manual Transmission (TY754VB1CA/AB/AC)

Type:

N/A (WRX exclusively manual for this generation/model year)

Drivetrain:

Symmetrical All-Wheel Drive (AWD) with viscous coupling center differential.

Clutch Type:

Hydraulically actuated, single dry plate clutch.

📐 Dimensions

Length:

173.4 inches (4404 mm)

Width:

68.1 inches (1730 mm)

Height:

56.1 inches (1425 mm)

Wheelbase:

100.0 inches (2540 mm)

Front Track:

58.7 inches (1490 mm)

Rear Track:

58.3 inches (1480 mm)

Curb Weight:

Approx. 3100-3150 lbs (1406-1429 kg) depending on trim/options.

🛡️ Safety Features

NHTSA Front Impact Driver:

5-Star

NHTSA Front Impact Passenger:

5-Star

IIHS Front Crashworthiness:

Good

ABS:

Standard Anti-lock Braking System (ABS)

Traction Control:

Standard Traction Control System (TCS)

Airbags Front:

Standard Driver and Front Passenger Airbags

Airbags Side:

Optional Front Side-Impact Airbags (may vary by trim)

Seatbelts:

Three-point front and rear seatbelts with pre-tensioners.

💡 Technology Features

Audio System:

Factory standard audio system with CD player. Limited integration by modern standards. Manual covers removal and installation of head unit and speakers.

ABS Traction Control:

Standard ABS and TCS are the primary electronic driver aids.

Bluetooth Usb:

No factory Bluetooth or USB connectivity. Aftermarket solutions are common.

🔧 Maintenance

Oil Change Interval:

Every 3,750 miles or 3 months (whichever comes first), or 7,500 miles/6 months under severe driving conditions (refer to manual for specifics).

Timing Belt Replacement:

Every 105,000 miles or 105 months (critical interval for EJ255 engine).

Spark Plug Replacement:

Every 30,000 miles (NGK PFR7B or equivalent recommended).

Engine Oil Type:

SAE 5W-30 Synthetic (API SG, SH, SJ, SL or ILSAC GF-2, GF-3) - Refer to manual for precise specification.

Engine Oil Capacity:

4.8 US quarts (4.5 liters) with filter change.

Coolant Type:

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

Transmission Fluid Type:

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

Differential Fluid Type Front:

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

Differential Fluid Type Rear:

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

Brake Fluid Type:

DOT 3 or DOT 4.

Head Gaskets:

While less prevalent than in earlier EJ20/EJ25 naturally aspirated engines, EJ255 head gasket failures can still occur, particularly if overheated or improperly maintained. Manual covers diagnosis and repair.

Oil Consumption:

Some EJ255 engines can exhibit higher oil consumption; the manual details checks and potential causes.

Clutch Wear:

Due to the performance-oriented nature, clutches can wear faster with aggressive driving. Manual provides clutch replacement procedures.

Turbocharger Failure:

The VF39 turbocharger, while robust, can fail if oil starvation or contamination occurs. Manual covers turbo diagnosis and replacement.

Suspension Bushings:

Wear on suspension bushings can lead to noise and imprecise handling. Manual details replacement.

📚 Vehicle History

Subaru Rally Heritage:

Subaru's long and successful history in the World Rally Championship (WRC) directly influenced the development and tuning of the WRX model.

Gc8 To Gd:

The 2005 model year marks the transition from the second-generation GC8 chassis to the third-generation GD chassis (often referred to as 'hawkeye' for later models, but the 2005 is a transitional GD model).

Wrx Positioning:

Positioned as a more accessible, street-oriented performance car compared to the ultra-high-performance STI variant.

Manufacturing Plant:

Ota City, Gunma Prefecture, Japan

🏆 Awards & Recognition

Sport Compact Car Awards:

Often lauded by automotive publications for its performance and value proposition in the sport compact segment during its era.