🏷️ Basic Information

Make:

Subaru

Model:

Impreza

Generation:

Second Generation (GD/GG)

Model Years Covered:

2001, 2002, 2003, 2004, 2005, 2006, 2007

Chassis Codes:

GD (Sedan), GG (Wagon)

👋 Introduction

Market Segment:

Compact car, known for its AWD system and rally heritage

Competitors:

Honda Civic, Toyota Corolla, Mazda3, Mitsubishi Lancer, Ford Focus

All Wheel Drive:

Standard Symmetrical All-Wheel Drive (AWD) on most trims, a significant differentiator

Performance Variants:

Includes WRX and STI performance models, distinct from standard Impreza models

Styling:

Distinctive styling, particularly the 'bug-eye' (2000-2002) and 'blob-eye'/'dog-eye' (2003-2005) front fascia designs.

📋 Manual Details

Covered Regions:

Global (North America, Europe, Asia, etc. - general workshop procedures apply)

Estimated Page Count:

~3000+ pages (comprehensive digital format)

Manual Type:

Workshop Service Manual / Repair Manual

Language:

English

Format:

PDF (Digital Download)

📖 Manual Coverage

Engine:

Engine mechanical, engine management, lubrication, cooling, fuel, exhaust, emissions

Transmission:

Manual transmission, automatic transmission, clutch, drivetrain, differentials

Suspension Steering:

Front and rear suspension, steering system, power steering, wheel alignment

Brakes:

Brake system, ABS (Anti-lock Braking System), brake components, parking brake

Electrical:

Battery, charging system, starting system, ignition system, lighting, instrumentation, body electrical, power distribution

Body Chassis:

Body structure, interior trim, exterior trim, doors, windows, glass, seats, heating, ventilation, and air conditioning (HVAC)

Safety Features:

Airbags, seat belts, child safety seat anchors (ISOFIX/LATCH)

Diagnostics:

On-Board Diagnostics (OBD-II) systems, diagnostic trouble codes (DTCs), diagnostic procedures, troubleshooting flowcharts

Maintenance:

Scheduled maintenance, fluid changes, filter replacements, tune-ups, inspections

Repair:

Component removal, installation, adjustment, overhaul, and replacement procedures

Troubleshooting:

Symptom-based troubleshooting guides, electrical circuit diagnostics

Specifications:

Torque specifications, clearances, fluid capacities, electrical values, timing specifications

Depth Of Coverage:

Comprehensive: Covers basic maintenance to complete engine and transmission rebuilds, including complex electrical diagnostics and body repairs.

📊 Manual Specifications

PDF Quality:

High resolution, searchable text, printable pages

Printability:

Designed for clear printing of individual pages or sections

Binding Type:

N/A (Digital PDF Download)

Paper Type:

N/A (Digital PDF Download)

Manual Completeness:

Complete workshop manual covering all aspects of vehicle repair and maintenance for the specified years and models.

⚙️ Engine Specifications

Engine Displacement Standard:

2.5 Liters (2457cc)

Engine Configuration Standard:

Horizontally-opposed 4-cylinder (Boxer engine)

Engine Code Standard:

EJ253 (Naturally Aspirated), EJ255 (Turbocharged WRX), EJ257 (Turbocharged STI)

Horsepower Standard Aspirated:

~165-173 hp @ 5600 rpm (varies slightly by year and sub-model)

Torque Standard Aspirated:

~166-170 lb-ft @ 3600 rpm (varies slightly by year and sub-model)

Horsepower Wrx:

~227-230 hp @ 5600 rpm (2001-2005), ~230-237 hp @ 5600 rpm (2006-2007)

Torque Wrx:

~236-240 lb-ft @ 3600 rpm (2001-2005), ~235-238 lb-ft @ 4000 rpm (2006-2007)

Horsepower Sti:

~300 hp @ 6000 rpm (USDM STI)

Torque Sti:

~300 lb-ft @ 4000 rpm (USDM STI)

Fuel Delivery:

Multi-point fuel injection (MPI)

Recommended Fuel:

87 Octane (Naturally Aspirated), 91+ Octane Recommended (WRX/STI)

🔧 Transmission

Standard Transmission:

5-speed Manual Transmission

Optional Transmission:

4-speed Automatic Transmission

AWD System:

Symmetrical All-Wheel Drive (Active AWD for automatics, viscous center differential for manuals)

Sti Transmission:

6-speed manual transmission with DCCD (Driver Controlled Center Differential) on STI models

📐 Dimensions

Wheelbase:

Approx. 104.0 inches (2640 mm)

Length:

Approx. 174.5-175.0 inches (4430-4445 mm) for Sedans, Approx. 177.5-178.5 inches (4505-4535 mm) for Wagons

Width:

Approx. 68.1 inches (1730 mm)

Height:

Approx. 56.1-56.7 inches (1425-1440 mm) for Sedans, Approx. 55.1-55.7 inches (1400-1415 mm) for Wagons

Curb Weight:

Approx. 2800-3100 lbs (1270-1406 kg), varies by trim and drivetrain

Gross Vehicle Weight Rating:

Typically around 4000-4200 lbs

🛡️ Safety Features

NHTSA Front Impact Driver:

Good (2001-2003 models tested, may vary)

NHTSA Front Impact Passenger:

Good (2001-2003 models tested, may vary)

IIHS Front Offset:

Acceptable to Good (varies by year and testing methodology)

ABS:

Standard on most trims, optional on base models early in the generation

Traction Control:

Optional on some trims, typically paired with automatic transmission

Electronic Stability Control:

Introduced later in the generation, often optional or standard on higher trims (VDC - Vehicle Dynamics Control)

Airbags:

Front airbags standard, side airbags optional or standard on higher trims

Seat Belts:

3-point front and rear seat belts, pre-tensioners on front belts

💡 Technology Features

Audio System:

Factory AM/FM/CD player, some models offered premium audio systems or optional CD changers.

Navigation:

Optional in-dash GPS navigation systems were available on higher trim levels.

Cruise Control:

Standard on most trims.

Auxiliary Input:

Some later models may have an auxiliary audio input jack.

🔧 Maintenance

Oil Change Interval:

Every 3,750 miles or 6 months for severe driving, 7,500 miles or 12 months for normal driving (check manual for specifics based on oil type).

Air Filter Replacement:

Typically every 15,000-30,000 miles or as needed based on driving conditions.

Spark Plug Replacement:

NGK Iridium spark plugs often have intervals of 60,000-100,000 miles.

Timing Belt Replacement:

105,000 miles or 105 months (non-interference engine on most models, but critical for engine longevity).

Engine Oil Type:

SAE 5W-30 Synthetic (check owner's manual for exact specification and temperature ranges)

Engine Oil Capacity:

Approx. 4.5 US quarts (4.3 L) with filter for 2.5L engines.

Coolant Type:

Subaru Super Coolant (Blue) or equivalent silicate-free OAT/HOAT coolant

Transmission Fluid Manual:

API GL-5, SAE 75W-90 Gear Oil (Subaru Extra-S recommended)

Transmission Fluid Automatic:

Subaru ATF HP or equivalent Dexron III compatible fluid (check specific fill)

Differential Fluid:

API GL-5, SAE 75W-90 Gear Oil (front and rear, check specific models for rear LSD fluid type)

Head Gaskets:

While less common than on earlier EJ25 engines, internal coolant leaks due to head gasket failure can occur on naturally aspirated models. Turbocharged models are generally more robust in this regard but require proper maintenance.

Oil Consumption:

Some EJ25 engines can consume oil, especially at higher mileage. Regular checking and topping up is advised.

Clutch Wear:

Clutch wear can be accelerated by aggressive driving, especially in performance variants.

Catalytic Converter:

Can become fouled or inefficient over time, leading to performance issues and check engine lights.

Front Suspension Components:

Sway bar links, ball joints, and control arm bushings can wear out due to road conditions.

📚 Vehicle History

Subaru AWD Heritage:

Subaru has built its reputation on Symmetrical All-Wheel Drive and horizontally-opposed engines since the 1970s, a core philosophy carried into the Impreza.

Generation Introduction:

The second generation Impreza (GD/GG) debuted for the 2001 model year, featuring a significant redesign from the first generation.

Facelifts:

Underwent facelifts: 'bug-eye' (2001-2002), 'blob-eye' (2003-2005), and 'dog-eye'/'hawk-eye' (2006-2007) front fascia designs.

Manufacturing Location:

Japan (Subaru's main production facilities)

🏆 Awards & Recognition

Car And Driver 10Best:

WRX models were frequently recognized on Car and Driver's 10Best lists during this generation for their performance and value.

World Rally Championship Heritage:

The Impreza WRX and STI lineage is deeply tied to Subaru's success in the World Rally Championship (WRC), contributing to its sporty image.