🏷️ Basic Information

Make:

Subaru

Model:

Impreza

Year:

2001

Generation Designation:

Second Generation (GD/GG)

Generation Introduction Year:

2000 (Japan), 2001 (North America)

Chassis Code:

GD (Sedan), GG (Wagon)

👋 Introduction

Market Position:

Subaru's compact car offering, known for its standard All-Wheel Drive system, rally heritage, and practical design. The 2001 model represents the first year of the second generation, featuring a significant redesign.

Key Competitors:

Honda Civic, Toyota Corolla, Mazda Protegé, Mitsubishi Lancer, Nissan Sentra

Distinguishing Features:

Standard Symmetrical All-Wheel Drive (AWD), boxer engine configuration, excellent handling characteristics, practical interior space (especially the wagon variant)

📋 Manual Details

Systems Covered:

Engine, Transmission (Manual & Automatic), Drivetrain (AWD), Suspension, Steering, Brakes, Electrical System, HVAC, Fuel System, Cooling System, Exhaust System, Body & Chassis, Interior Trim, Safety Restraints, Diagnostic Procedures, Troubleshooting

Estimated Page Count:

1500+

Manual Type:

Factory Service Manual / Repair Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Engine Mechanical:

Detailed disassembly, assembly, inspection, and repair of EJ20, EJ202, EJ204, EJ251, EJ253 engines (including piston, connecting rod, crankshaft, cylinder head, valves, timing belt/chain systems)

Engine Management:

ECU operation, sensor diagnostics (MAP, MAF, TPS, O2, CKP, CMP), fuel injection, ignition system, emissions control systems (catalytic converter, EGR, PCV), EVAP

Transmission Manual:

Disassembly, inspection, repair, and overhaul of 5-speed and 6-speed (WRX) manual transmissions, clutch system, shift linkages

Transmission Automatic:

Operation, diagnosis, and repair of 4-speed automatic transmissions (e.g., 4EAT/TZ1A), hydraulic control systems, torque converter

Drivetrain:

Subaru Symmetrical All-Wheel Drive (AWD) system operation, center differential, rear differential, driveshafts, CV joints, wheel bearings

Suspension:

Front MacPherson strut and rear multi-link suspension, springs, dampers, control arms, bushings, alignment specifications

Steering:

Rack and pinion steering system, power steering pump, fluid, steering column, intermediate shaft

Brakes:

Front ventilated discs, rear discs, ABS system (operation and diagnosis), brake lines, master cylinder, calipers, pads, rotors, parking brake

Electrical System:

Wiring diagrams, fuse box locations, relay functions, battery, charging system (alternator, starter), lighting system (headlights, taillights, interior), power windows, mirrors, locks, wipers, horn

HVAC:

Air conditioning system (refrigerant, compressor, condenser, evaporator), heater core, blower motor, climate controls, cabin air filter replacement

Body Chassis:

Body panel removal and installation, door mechanisms, glass replacement, bumper systems, frame structure, corrosion protection

Interior Trim:

Dashboard removal, seat removal and installation, headliner, door panels, center console

Safety Restraints:

Airbag system components and diagnosis, seatbelt operation and replacement

Maintenance Procedures:

Oil and filter changes, fluid level checks and top-offs, spark plug replacement, air filter replacement, fuel filter replacement, coolant flush and replacement, brake fluid flush, timing belt replacement, cabin air filter replacement

Repair Procedures:

Engine rebuilds, head gasket replacement, clutch replacement, transmission overhaul, brake caliper/rotor replacement, suspension component replacement, electrical component diagnosis and replacement, A/C system servicing

Diagnostic Procedures:

Troubleshooting charts, OBD-II diagnostic trouble codes (DTCs), sensor testing, circuit testing, common fault diagnosis

Technical Depth:

Comprehensive, covering basic maintenance to complete engine and transmission overhauls, detailed electrical system diagnostics, and body repair

📊 Manual Specifications

File Format:

Searchable PDF

Print Quality:

High-resolution, clear text and diagrams suitable for printing

Binding Type:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Options:

2.5L EJ251 SOHC Naturally Aspirated (most North American models), 2.0L EJ202/EJ204 SOHC/DOHC Naturally Aspirated (some markets), 2.0L EJ205 DOHC Turbocharged (WRX models)

Ej251 Horsepower:

165 hp @ 5600 rpm (estimated)

Ej251 Torque:

166 lb-ft @ 4000 rpm (estimated)

Ej205 Turbo Horsepower:

227 hp @ 5600 rpm (WRX model)

Ej205 Turbo Torque:

217 lb-ft @ 3000 rpm (WRX model)

Fuel Delivery:

Multi-point fuel injection (MPI)

Recommended Fuel:

87 Octane (Naturally Aspirated), 91 Octane (Turbocharged WRX)

Engine Layout:

Horizontally-opposed (Boxer)

🔧 Transmission

Transmission Standard:

5-Speed Manual Transmission

Transmission Optional:

4-Speed Automatic Transmission (4EAT/TZ1A)

AWD System:

Subaru Symmetrical All-Wheel Drive (AWD) with viscous center differential (manual) or electronically controlled hydraulic multi-plate clutch center differential (automatic)

📐 Dimensions

Wheelbase:

2515 mm (99.0 in)

Length Sedan:

4410 mm (173.6 in)

Length Wagon:

4405 mm (173.4 in)

Width:

1700 mm (66.9 in)

Height:

1420 mm (55.9 in) (Sedan) / 1475 mm (58.1 in) (Wagon)

Curb Weight Est:

1300-1400 kg (2866-3086 lbs)

Gross Vehicle Weight Rating Est:

1800-1900 kg (3968-4189 lbs)

🛡️ Safety Features

NHTSA Front Impact Driver:

Not rated (for 2001 model year specifically, later models improved)

NHTSA Front Impact Passenger:

Not rated (for 2001 model year specifically)

Active Safety Features:

Anti-lock Braking System (ABS) - standard on most trims, Traction Control System (TCS) - available on higher trims

Passive Safety Features:

Dual front airbags, front seatbelt pretensioners, side-impact door beams, crumple zones

💡 Technology Features

Infotainment System:

Basic AM/FM stereo with CD player, optional cassette player; manual climate control

Driver Assistance Features:

Limited to ABS and optional Traction Control

Connectivity Features:

No Bluetooth or USB connectivity; basic power accessories (windows, locks) available on higher trims

🔧 Maintenance

Oil Change Interval:

Every 3,750 miles or 3 months (severe duty), or 7,500 miles or 6 months (normal duty) - consult manual for specifics

Timing Belt Replacement Interval:

Every 60,000 miles or 4 years (for EJ251 engine) - CRITICAL maintenance item

Spark Plug Replacement Interval:

Every 30,000-60,000 miles, depending on spark plug type (refer to manual)

Engine Oil Specification:

SAE 5W-30 API SG/SH/SJ certified

Engine Oil Capacity:

4.5 US quarts (4.3 liters) with filter change (EJ251)

Coolant Specification:

Subaru Genuine Coolant or equivalent (Ethylene Glycol based, 50/50 mix with distilled water)

Transmission Fluid Manual:

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

Transmission Fluid Automatic:

Subaru Genuine ATF HP or equivalent

Brake Fluid Specification:

DOT 3 or DOT 4

Common Issues Ej251:

Head gasket leaks (often oil or coolant), piston ring land failure (cracking on piston tops, especially in high-performance applications or if poorly maintained), radiator leaks, AC compressor failures

Common Issues AWD:

Clunking or binding in drivetrain (differential issues, driveshaft U-joints), wheel bearing wear

Common Issues General:

Rust on fenders and rocker panels, interior rattles, ABS sensor failures

📚 Vehicle History

Brand Heritage Notes:

Subaru, a division of Subaru Corporation (formerly Fuji Heavy Industries), has a strong history in aircraft manufacturing and a reputation for producing reliable vehicles with innovative technologies, particularly its All-Wheel Drive system and boxer engines.

Model Evolution Notes:

The 2001 Impreza marks the debut of the second generation (GD/GG), a significant departure from the first generation with a completely new chassis and styling. This generation introduced the iconic WRX performance variant to North America.

Production Location:

Gunma Plant, Japan

Production Years For Generation:

2000-2007

🏆 Awards & Recognition

Awards Notes:

While the 2001 model year predates many specific awards for the second generation in North America, Subaru's reputation for AWD and safety was already established. The WRX variant, introduced to the US market with this generation in 2002, went on to receive numerous accolades for its performance and rally-inspired capabilities.