🏷️ Basic Information

Make:

Subaru

Model:

Impreza

Model Years Covered:

2001, 2002

Generation:

Second Generation (GD/GG)

Chassis Codes:

GD (Sedan), GG (Wagon)

👋 Introduction

Vehicle Class:

Compact Car

Target Audience:

Enthusiasts, DIY mechanics, Subaru owners seeking self-sufficiency in maintenance and repair.

Competitors:

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

All Wheel Drive:

Standard Symmetrical All-Wheel Drive (AWD) on most models, a key differentiator.

Performance Variants:

Availability of high-performance WRX and STI variants.

Utility:

Practicality and versatility, especially in the wagon (GG) body style.

Cost Savings:

Significant potential savings on labor costs for routine maintenance and repairs.

Empowerment:

Empowers owners to understand and maintain their vehicles, fostering confidence and independence.

📋 Manual Details

Primary Focus:

Repair and Service

Secondary Focus:

Maintenance, Diagnostics, Troubleshooting

Estimated Page Count:

Extensive (often 1000+ pages for full factory service manuals)

Type:

Factory Service Manual / Repair Manual

Language:

English

Format:

PDF (Instant Download)

📖 Manual Coverage

Engine Mechanical:

Engine removal/installation, cylinder head, valve train, engine block, lubrication, timing belt/chain, piston, crankshaft, connecting rods, oil pump, oil seals

Engine Management:

Fuel system, emissions control, ignition system, fuel injectors, fuel pump, ECU diagnostics, sensors (MAP, TPS, O2, Knock), emissions related components (EVAP, EGR)

Transmission Manual:

Clutch operation, manual transmission removal/installation, internal components, gear shifting mechanism, clutch master/slave cylinders, flywheel

Transmission Automatic:

Automatic transmission removal/installation, torque converter, valve body, internal gears, planetary sets, transmission fluid cooler, electronic controls

Drivetrain:

Front differential, rear differential (if applicable, e.g., AWD models), driveshaft, CV joints, wheel bearings, AWD system operation (Viscous Coupling Unit or similar)

Suspension:

Front and rear suspension components, struts, shock absorbers, control arms, bushings, sway bars, alignment specifications

Steering:

Power steering system, steering rack, tie rods, steering column, steering wheel, alignment

Brakes:

Front and rear brake systems, disc brakes, brake pads, rotors, calipers, brake lines, master cylinder, brake booster, ABS system (including sensors, control module)

Electrical Body:

Interior and exterior lighting, power windows, power locks, mirrors, wipers, horn, infotainment system, dashboard instruments

Electrical Engine:

Starter motor, alternator, battery, engine sensors, ECU wiring, ignition coil wiring

HVAC:

Heating, ventilation, and air conditioning (HVAC) system, refrigerant, compressor, condenser, evaporator, blower motor, climate control system

Safety Systems:

Supplemental Restraint System (SRS) - Airbags (driver, passenger, side), SRS warning light diagnosis, seat belt pre-tensioners

Bodywork:

Body panel removal/installation, doors, hood, trunk, bumpers, glass, interior trim, rust prevention

Routine Maintenance:

Oil and filter change, air filter replacement, cabin air filter replacement, spark plug replacement, fluid checks and top-offs

Tune Up:

Spark plug gap and type, ignition timing (if adjustable), idle speed adjustments, fuel system cleaning

Engine Repair:

Complete engine rebuild procedures, piston ring replacement, bearing replacement, cylinder honing, valve seat grinding, head gasket replacement

Transmission Repair:

Detailed procedures for manual and automatic transmission overhaul and repair

Brake Service:

Brake pad and rotor replacement, caliper servicing, brake bleeding, ABS component replacement and bleeding procedures

Suspension And Steering Repair:

Replacement of struts, shocks, ball joints, tie rod ends, control arm bushings, steering rack repair

Electrical Diagnostics:

Troubleshooting electrical issues, wiring harness diagrams, component testing, diagnostic trouble codes (DTCs)

Air Conditioning Service:

Refrigerant handling, system evacuation and charging, component replacement (compressor, receiver-drier)

Heating And Cooling System:

Radiator removal/installation, thermostat replacement, water pump replacement, heater core service

Emissions Control Service:

Diagnosis and repair of emission control systems, catalytic converter replacement, EVAP system testing

Troubleshooting:

Diagnostic flowcharts and procedures for common and uncommon problems across all vehicle systems

Technical Specifications:

Torque specifications, fluid capacities, recommended fluid types, electrical component resistance values, alignment angles

Wiring Diagrams:

Comprehensive wiring schematics for all vehicle electrical systems

Depth:

Comprehensive: Covers basic maintenance through complete engine and transmission rebuilds, including advanced diagnostics and electrical troubleshooting.

Illustrations:

Detailed illustrations and diagrams for component identification and repair procedures.

Diagnostic Codes:

Coverage of Diagnostic Trouble Codes (DTCs) and diagnostic procedures for OBD-II systems.

Special Tools:

Identification and usage of specialized tools required for specific repairs.

📊 Manual Specifications

Format:

Portable Document Format (PDF)

Searchability:

Likely searchable text for quick information retrieval.

Printability:

Printable, allowing users to print specific pages or sections as needed.

Digital Binding:

N/A (Digital Download)

Digital Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Type Base:

Naturally Aspirated Boxer (EJ series)

Displacement Base:

2.5 Liters (EJ253)

Horsepower Base:

Approx. 165 hp @ 5600 rpm

Torque Base:

Approx. 166 lb-ft @ 4000 rpm

Engine Type Wrx:

Turbocharged Boxer (EJ205)

Displacement Wrx:

2.0 Liters

Horsepower Wrx:

Approx. 227 hp @ 5600 rpm

Torque Wrx:

Approx. 217 lb-ft @ 4000 rpm

Engine Type Sti:

Turbocharged Boxer (EJ257)

Displacement Sti:

2.5 Liters

Horsepower Sti:

Approx. 300 hp @ 6000 rpm

Torque Sti:

Approx. 300 lb-ft @ 4000 rpm

Fuel Delivery:

Multi-point Fuel Injection (MPI)

Fuel Type Recommendation:

Unleaded Gasoline (Octane rating varies by model, premium required for WRX/STI)

🔧 Transmission

Transmission Type Base:

5-Speed Manual Transmission

Transmission Type Optional:

4-Speed Automatic Transmission

Drivetrain:

Symmetrical All-Wheel Drive (AWD) standard on most trims.

AWD System:

Center Viscous Coupling (VC) on manual transmissions, electronically controlled AWD on automatics.

📐 Dimensions

Wheelbase:

Approx. 104.0 inches

Length:

Sedan: Approx. 179.9 inches; Wagon: Approx. 175.0 inches

Width:

Approx. 68.1 inches

Height:

Sedan: Approx. 55.9 inches; Wagon: Approx. 56.1 inches

Curb Weight:

Varies by trim and body style, typically 2900-3300 lbs

Towing Capacity:

Generally not recommended for towing.

🛡️ Safety Features

NHTSA Front Impact:

Good (for 2001-2002 models, specific ratings may vary)

NHTSA Side Impact:

Good (for 2001-2002 models, specific ratings may vary)

ABS:

Anti-lock Braking System (ABS) available or standard on most trims.

Traction Control:

Traction Control System (TCS) available on some models.

Airbags:

Front airbags standard, side airbags available on some trims.

Seatbelts:

Three-point seatbelts with pretensioners.

💡 Technology Features

Audio System:

Factory-installed AM/FM stereo with CD player. Optional premium audio systems may be available on higher trims.

Navigation:

No integrated navigation system offered for these model years.

Cruise Control:

Standard on most trims.

Stability Control:

Vehicle Stability Control (VSC) and Traction Control were not widely available or standard on these model years; check specific trim for availability.

Auxiliary Input:

No standard auxiliary audio input; aftermarket solutions often required for modern device connectivity.

Bluetooth:

Not available from the factory.

🔧 Maintenance

Oil Change Interval:

Typically every 3,750 to 7,500 miles or 6 months, depending on driving conditions and oil type used (consult manual for exact recommendations).

Air Filter Replacement:

Every 15,000 to 30,000 miles or as needed based on driving environment.

Cabin Air Filter:

Typically every 15,000 to 30,000 miles.

Spark Plug Replacement:

Around 60,000 to 100,000 miles, depending on the type of spark plug installed.

Timing Belt Replacement:

Crucial for naturally aspirated EJ25 engines; typically 105,000 miles or 7 years. Failure can cause catastrophic engine damage. WRX models with EJ205/EJ257 use timing chains (which typically do not require replacement unless issues arise, though tensioners and guides are monitored).

Transmission Fluid Change:

Manual: Check condition, typically change every 30,000-60,000 miles. Automatic: Every 30,000-60,000 miles.

Engine Oil:

API SN/SP certified; Viscosity typically 5W-30 or 10W-30 (check manual for specific engine variant and temperature ranges).

Coolant:

Subaru Super Coolant (blue) or equivalent silicate-free, long-life coolant. Typically a 50/50 mix with distilled water.

Transmission Fluid Manual:

GL-5 gear oil, typically 75W-90 viscosity.

Transmission Fluid Automatic:

Subaru Genuine ATF-HP or equivalentDexron III/Mercon.

Differential Fluid:

GL-5 gear oil, typically 75W-90 viscosity for front and rear differentials.

Brake Fluid:

DOT 3 or DOT 4 brake fluid.

Head Gaskets:

While not as prevalent as on earlier generations, early second-gen models can experience head gasket leaks. The manual will detail inspection and repair procedures.

Ej Engine Crank Seals:

Front and rear main crankshaft seals can develop leaks over time, requiring engine removal for replacement.

Clutch Wear:

Clutches can wear out, especially in WRX models used for spirited driving.

Catalytic Converter:

Can become clogged or fail over time, impacting performance and emissions.

Turbocharger Issues:

In WRX/STI models, improper maintenance, oil starvation, or excessive heat can lead to turbocharger failure.

📚 Vehicle History

Subaru Heritage:

Subaru, a division of Subaru Corporation (formerly Fuji Heavy Industries), has a long history of producing reliable vehicles, often with a focus on AWD technology and horizontally opposed (boxer) engines.

Impreza Introduction:

The Impreza was first introduced globally in 1992. The 2001-2002 models represent the second generation (GD/GG), which debuted in 2000.

Second Generation Design:

This generation marked a significant styling change, moving towards a more rounded and aerodynamic design compared to its predecessor. It also introduced the iconic WRX model to more markets.

Manufacturing Locations:

Primarily manufactured in Japan, with some assembly occurring in other regions depending on market.

Wrx Rally Heritage:

The Impreza WRX and STI have a legendary motorsport pedigree, particularly in the World Rally Championship (WRC), which significantly boosted their global appeal and performance image.

🏆 Awards & Recognition

Car And Driver 10Best:

The Impreza WRX was frequently recognized on Car and Driver's 10Best lists during this era for its performance and value.

IIHS Crash Test:

The Impreza generally performed well in IIHS crash tests for its time, receiving 'Good' ratings in frontal and side impact tests.