🏷️ Basic Information

Make:

Subaru

Model:

Impreza

Model Year:

2002

Generation Code:

GD/GG

Platform Code:

Subaru Global Platform

👋 Introduction

Segment:

Compact car, known for its rally heritage and standard All-Wheel Drive (AWD) system.

Key Competitors 2002:

Honda Civic Si, Acura RSX, Mitsubishi Lancer ES/GTS, Ford Focus SVT, Volkswagen Golf GTI, Mazda Protegé MP3/Mazdaspeed Protegé.

Standard AWD:

Subaru's signature Symmetrical All-Wheel Drive system provided superior traction and handling, a key differentiator.

Performance Variants:

Offered in various trims including the WRX model, known for its turbocharged engine and performance focus.

Body Styles:

Available as a 4-door sedan and a 5-door wagon/hatchback.

📋 Manual Details

Primary Coverage:

North America

Secondary Coverage:

Global (technical specifications may vary slightly by region)

Estimated Page Count:

Approximately 1500-2000 pages (typical for FSM of this era)

Type:

Factory Service Manual (FSM) / Workshop Manual / Repair Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Powertrain:

Engine mechanical, fuel system, ignition system, exhaust system, cooling system, lubrication system, engine electrical systems, transmission (manual and automatic), drivetrain (AWD system, differentials).

Chassis:

Suspension (front and rear), steering system, brake system (including ABS), wheels and tires.

Body And Interior:

Body construction, exterior trim, interior trim, seating systems, HVAC (Heating, Ventilation, and Air Conditioning).

Electrical And Electronics:

Wiring diagrams, lighting systems, power accessories, instrument panel, audio system, immobilizer system, airbags (SRS).

Maintenance:

Scheduled maintenance intervals, fluid changes (oil, coolant, brake fluid, transmission fluid), filter replacements, spark plug service.

Diagnostics:

Troubleshooting charts, symptom-based diagnostics, diagnostic trouble codes (DTCs), procedures for using Subaru Select Monitor (SSM).

Repair And Rebuild:

Component removal and installation, overhaul procedures for engine, transmission, differentials, suspension components, brake calipers.

Technical Specifications:

Torque specifications for all fasteners, clearances, tolerances, diagnostic values, wiring schematics.

Depth:

Comprehensive from basic fluid changes and component replacement to complete engine and transmission rebuilds, including in-depth electrical system diagnostics and troubleshooting.

📊 Manual Specifications

Format:

PDF

Searchability:

Text-searchable PDF (allows quick keyword searches)

Quality:

High-resolution scans of original factory documentation, suitable for printing individual sections or the entire manual.

Binding:

Digital download (PDF). For printed copies, binding would typically be spiral or perfect bound for workshop use.

Paper:

Digital PDF. Original factory manuals were printed on durable paper stock for workshop environments.

⚙️ Engine Specifications

Engine Code:

EJ251 (Naturally Aspirated), EJ255 (Turbocharged - WRX)

Configuration:

Horizontally-opposed (Boxer) 4-cylinder

Displacement Na:

2.5 Liters (2457 cc)

Displacement Turbo:

2.0 Liters (1994 cc) - EJ205 (early WRX), 2.5 Liters (2457 cc) - EJ255 (later WRX)

Horsepower Na:

165 hp @ 5,600 rpm (EJ251)

Torque Na:

166 lb-ft @ 4,000 rpm (EJ251)

Horsepower Turbo:

227 hp @ 5,600 rpm (EJ205 - WRX), 230 hp @ 5,600 rpm (EJ255 - WRX)

Torque Turbo:

217 lb-ft @ 4,000 rpm (EJ205 - WRX), 235 lb-ft @ 3,500 rpm (EJ255 - WRX)

Induction:

Multi-point fuel injection (MPI) / Sequential Electronic Fuel Injection (SEFI)

Fuel Type:

Unleaded gasoline, 87 octane (91 or higher recommended for WRX models)

Compression Ratio Na:

9.7:1

Compression Ratio Turbo:

8.5:1 (EJ205), 8.4:1 (EJ255)

🔧 Transmission

Type:

5-speed manual transmission

Type:

4-speed automatic transmission

AWD System Manual:

Viscous center coupling (VCS) with mechanical front and rear differentials.

AWD System Automatic:

Active All-Wheel Drive (Variable Torque Distribution) with electronically controlled clutch pack.

Transmission Fluid Manual:

GL-5 Gear Oil, SAE 75W-90

Transmission Fluid Automatic:

Subaru ATF-HP (or equivalent DEXRON III/MERCON)

📐 Dimensions

Length:

Sedan: 173.4 in (4404 mm); Wagon: 174.2 in (4425 mm)

Width:

66.9 in (1700 mm)

Height:

Sedan: 55.1 in (1400 mm); Wagon: 56.3 in (1430 mm)

Wheelbase:

100.0 in (2540 mm)

Front Track:

58.1 in (1475 mm)

Rear Track:

57.7 in (1465 mm)

Ground Clearance:

5.8 in (147 mm) (standard models), 7.1 in (180 mm) (WRX models)

Curb Weight:

Approx. 2,900 - 3,200 lbs (1315 - 1451 kg) depending on trim and drivetrain

🛡️ Safety Features

NHTSA Front Impact:

Driver: 4/5 stars, Passenger: 4/5 stars

NHTSA Side Impact:

Front: 4/5 stars, Rear: 4/5 stars

Braking System:

Front ventilated discs, rear solid discs. Optional Anti-lock Braking System (ABS).

Traction Control:

Available on some higher trims, standard AWD system contributes to traction.

Airbags:

Driver and front passenger airbags. Optional side airbags on some trims.

Seatbelts:

Three-point seatbelts for all seating positions, pretensioners for front seats.

Child Seat Anchors:

LATCH (Lower Anchors and Tethers for Children) system.

💡 Technology Features

Audio System:

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

Display:

Basic digital clock and radio display. No integrated navigation or large color screens.

ABS:

Optional Anti-lock Braking System (ABS) available on some models.

Cruise Control:

Standard on most trims.

Connectivity Features:

Limited connectivity by modern standards. Features include power windows, power locks, and remote keyless entry on higher trims.

🔧 Maintenance

Oil Change:

Every 3,750 miles or 6 months (severe duty) / 7,500 miles or 6 months (normal duty)

Air Filter Replacement:

Every 15,000 miles or 12 months

Spark Plug Replacement:

Every 60,000 miles (standard models) / 30,000 miles (WRX models with platinum plugs)

Timing Belt Replacement:

Every 105,000 miles or 105 months (for EJ251/EJ255 engines, consult manual for exact recommendation)

Engine Oil:

5W-30 API SG or SH, synthetic blend recommended. Capacity: 4.5 US quarts (4.2 L) with filter.

Coolant:

Subaru Super Coolant (blue) or equivalent; 50/50 mixture with distilled water. Capacity: ~7.1 US quarts (6.7 L)

Brake Fluid:

DOT 3 or DOT 4.

Power Steering Fluid:

Subaru Power Steering Fluid or DEXRON III/MERCON compatible ATF. Capacity: ~1.0 US quart (0.9 L)

Head Gaskets:

While less prevalent than earlier EJ engines, potential for coolant leaks from head gaskets exists. Manual covers inspection and replacement procedures.

Oil Consumption:

Some EJ engines can exhibit higher oil consumption. Manual provides diagnosis for oil consumption issues.

Wrx Turbo Issues:

EJ205/EJ255 turbochargers can be prone to failure if not properly maintained or if oil starvation occurs. Manual details turbocharger inspection and maintenance.

Clutch Wear:

Wear on the clutch assembly in manual transmission models is a common maintenance item. Manual covers clutch inspection and replacement.

📚 Vehicle History

Heritage:

Subaru Corporation, a division of Fuji Heavy Industries, known for its automotive and aerospace engineering, particularly for its pioneering use of AWD in passenger cars.

Generation Launch:

The GD/GG generation of the Impreza debuted for the 2002 model year, marking a significant redesign from the previous GC/GF generation.

Updates:

Facelifted in 2004 (Bugeye to Blobeye) with revised styling and the introduction of the STI model in North America.

Manufacturing Location:

Mainly manufactured in Japan (Gunma Prefecture).

Production Years:

2002-2007 (GD/GG generation)

🏆 Awards & Recognition

Car And Driver Alist:

Impreza WRX frequently featured on Car and Driver's 10Best list for its performance and value.

Motor Trend Car Of The Year:

While not winning, the Impreza platform has been a strong contender and highly regarded by automotive journalists.