🏷️ Basic Information

Make:

Subaru

Model:

Impreza

Year:

2001

Chassis Codes:

GD, GG, GGD, GGB

Generation:

Second Generation (GD/GG)

👋 Introduction

Market Position:

The Subaru Impreza 2001 was positioned as a sporty, reliable, and practical compact car, known for its standard Symmetrical All-Wheel Drive (AWD) system. It competed with vehicles like the Honda Civic, Toyota Corolla, Mitsubishi Lancer, and Ford Focus. The Impreza offered performance variants (e.g., WRX in certain markets) that broadened its appeal.

Competitive Analysis:

In its segment, the Impreza stood out due to its standard AWD, which provided superior traction in various weather conditions. This manual provides the necessary technical information to maintain and repair this advanced feature, setting it apart from competitors that often offered AWD as an option or not at all. The manual's depth ensures owners can maintain the vehicle's unique performance characteristics.

Key Features:

Standard Symmetrical All-Wheel Drive (AWD) on most models, Boxer engine configuration for a lower center of gravity, sporty handling, and a reputation for durability and rally-bred heritage, especially with WRX variants.

📋 Manual Details

Coverage Areas:

All mechanical and electrical systems, body, chassis, and diagnostics for Subaru Impreza 2001 models.

Page Count:

Hundreds of pages (specific count not provided, but typical for comprehensive factory manuals)

Manual Type:

Factory Service Repair Manual

Language:

English

Format:

Download PDF

📖 Manual Coverage

Systems Covered:

Engine mechanical, engine control systems (ECM/ECU), fuel system, ignition system, exhaust system, cooling system, lubrication system, starting system, charging system, manual transmission, automatic transmission, drivetrain, all-wheel drive system, suspension (front and rear), steering system, brake system (including ABS), power steering, wheels and tires, body electrical systems (lighting, wipers, windows, locks, horn), HVAC system, SRS airbag system, body and frame, interior trim, exterior trim, diagnostic trouble codes (DTCs), wiring diagrams.

Procedures Included:

Routine maintenance, scheduled maintenance, component removal and installation, disassembly and assembly, troubleshooting and diagnostics, repair procedures, specifications, torque values, diagnostic trouble code (DTC) interpretation and repair, electrical system testing, fuel system testing, emissions system testing, clutch inspection and replacement, brake pad and rotor replacement, suspension component replacement, steering system alignment, engine tune-up procedures, timing belt replacement (if applicable), diagnostic flowcharts, wiring harness repair, body panel repair, interior component repair.

Technical Depth:

Comprehensive. Covers everything from basic fluid changes and filter replacements to complex engine rebuilds, transmission overhauls, advanced electrical diagnostics, and structural repairs. Designed for professional technicians and advanced DIY enthusiasts.

📊 Manual Specifications

File Format:

Portable Document Format (PDF)

Print Quality:

High resolution, suitable for printing individual pages or the entire document. Clear diagrams and illustrations.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Primary Engine Options:

EJ201 (2.0L SOHC), EJ202 (2.0L DOHC), EJ253 (2.5L SOHC), EJ205 (2.0L DOHC Turbocharged - WRX)

2.0L Sohc (Ej201) Horsepower:

Approx. 125 hp @ 5600 rpm

2.0L Sohc (Ej201) Torque:

Approx. 130 lb-ft @ 4000 rpm

2.5L Sohc (Ej253) Horsepower:

Approx. 165 hp @ 5600 rpm

2.5L Sohc (Ej253) Torque:

Approx. 166 lb-ft @ 4000 rpm

2.0L DOHc Turbocharged (Ej205 - Wrx) Horsepower:

Approx. 227 hp @ 5600 rpm (JDM/European spec)

2.0L DOHc Turbocharged (Ej205 - Wrx) Torque:

Approx. 217 lb-ft @ 4000 rpm (JDM/European spec)

Fuel System Type:

Electronic Fuel Injection (EFI)

Fuel Type:

Unleaded Gasoline (Octane rating varies by engine, typically 87 or higher for naturally aspirated, 91+ for turbocharged)

Engine Layout:

Horizontally Opposed (Boxer)

Engine Construction:

Aluminum alloy block and cylinder heads

Ignition System Type:

Distributorless ignition system (DIT) with coil-on-plug (COP) or coil-near-plug.

🔧 Transmission

Standard Transmission Type:

5-speed Manual Transmission

Optional Transmission Type:

4-speed Automatic Transmission with Electronically Controlled (ECT)

Drivetrain:

Symmetrical All-Wheel Drive (AWD) standard on most models. Front-wheel drive (FWD) was available on base models in some markets.

AWD System Type:

Viscous coupling limited-slip center differential (manual transmission) or electronically controlled multi-plate clutch (automatic transmission).

Manual Transmission Fluid:

API GL-5, SAE 75W-90 (Subaru Extra-S or equivalent)

Automatic Transmission Fluid:

Subaru ATF-HP (Highly Recommended) or Dexron III/Mercon compatible fluid.

📐 Dimensions

Wheelbase:

Approx. 2525 mm (99.4 in)

Overall Length:

Approx. 4410 mm (173.6 in)

Overall Width:

Approx. 1740 mm (68.5 in)

Overall Height:

Approx. 1430 mm (56.3 in)

Ground Clearance:

Approx. 150 mm (5.9 in) (non-WRX), 135 mm (5.3 in) (WRX)

Curb Weight:

Approx. 1300 - 1450 kg (2866 - 3197 lbs) depending on configuration

Gross Vehicle Weight Rating:

Varies by model and configuration, consult vehicle VIN plate.

Cargo Volume Sedan:

Approx. 0.38 m³ (13.4 cu ft)

Cargo Volume Wagon:

Approx. 0.86 m³ (30.4 cu ft) behind rear seats, expandable

🛡️ Safety Features

NHTSA Front Impact Rating:

4 stars (driver), 4 stars (passenger) for 2001 model year (specific vehicle tested may vary)

IIHS Offset Crash Test:

Good (for models tested, varies by year)

Active Safety Features:

Standard Symmetrical All-Wheel Drive (AWD), optional Anti-lock Braking System (ABS), power-assisted brakes.

Passive Safety Features:

Frontal airbags (driver and passenger), optional front-seat side airbags, 3-point seatbelts with pretensioners, crumple zones, energy-absorbing steering column, reinforced passenger compartment.

💡 Technology Features

Infotainment Features:

Base models typically came with a standard AM/FM/CD player. Higher trims may have offered an upgraded stereo system with cassette player and more speakers. Limited digital integration by modern standards.

Driver Assistance Features:

Limited by contemporary standards. ABS was an option. No electronic stability control (ESC) or advanced driver-assistance systems (ADAS) were available for this model year.

Connectivity Features:

No integrated Bluetooth or smartphone connectivity. Analog systems with provisions for optional CD changers or aftermarket audio upgrades.

Diagnostic Interface:

OBD-II (On-Board Diagnostics II) compliant. The manual provides detailed information on accessing and interpreting diagnostic trouble codes (DTCs) using an OBD-II scanner.

🔧 Maintenance

Oil Change Interval:

Every 3,000-7,500 miles (5,000-12,000 km) or 6-12 months, depending on driving conditions and oil type used. Consult owner's manual for specific recommendations based on severe vs. normal driving. Typically 3,750 miles (6,000 km) for severe duty.

Engine Oil Type:

SAE 5W-30 or 5W-40, API SJ or higher, ILSAC GF-2 or higher. Subaru recommends their own synthetic oils for optimal performance. Consult manual for specific viscosity based on temperature.

Engine Oil Capacity:

Approx. 4.5 US quarts (4.3 liters) with filter for 2.5L, Approx. 4.0 US quarts (3.8 liters) with filter for 2.0L.

Air Filter Replacement:

Every 15,000-30,000 miles (24,000-48,000 km) or as needed based on driving environment.

Spark Plug Replacement:

Approx. 30,000-60,000 miles (48,000-96,000 km), depending on plug type (e.g., platinum or iridium). Naturally aspirated models typically use Iridium plugs with a longer interval.

Timing Belt Replacement:

Critical! For EJ20 and EJ25 engines, typically every 60,000-105,000 miles (96,000-160,000 km) or 7-10 years. Subaru recommends checking and replacing around 105,000 miles. Failure can cause catastrophic engine damage.

Coolant Replacement:

Initial replacement at 30,000 miles or 3 years, then every 30,000 miles or 3 years thereafter. Use Subaru Super Coolant (blue) or equivalent.

Brake Fluid Type:

DOT 3 or DOT 4

Power Steering Fluid:

Subaru Genuine Power Steering Fluid or Dexron III/Mercon compatible automatic transmission fluid.

Known Issues Head Gaskets:

While the second generation Impreza saw improvements, head gasket leaks (especially external leaks) can still be an issue, particularly on higher mileage EJ25 SOHC engines. This manual details inspection and replacement procedures.

Known Issues Oil Consumption:

Some EJ25 engines can exhibit increased oil consumption over time, potentially due to piston ring wear or PCV system issues. The manual provides diagnostic steps for oil consumption.

Known Issues Clutch Wear:

Clutch wear can be accelerated with aggressive driving, especially on WRX models. The manual covers clutch inspection, replacement, and flywheel resurfacing.

Known Issues Suspension Bushings:

Rubber suspension bushings can degrade over time, leading to noise or imprecise handling. The manual details the replacement of these components.

Known Issues Turbo Maintenance Wrx:

For WRX models, proper turbocharger maintenance (e.g., oil changes, cool-down periods) is crucial. The manual covers turbocharger diagnosis and replacement procedures.

📚 Vehicle History

Brand Heritage:

Subaru, a division of Subaru Corporation (formerly Fuji Heavy Industries), has a long history of producing vehicles known for their durability, reliability, and unique engineering, particularly its horizontally opposed ('Boxer') engines and Symmetrical All-Wheel Drive systems. The brand has a strong association with aviation engineering and motorsports.

Model Evolution To 2001:

The Impreza was first introduced in 1992 as a replacement for the Subaru Leone. The 2001 model year marks the introduction of the second generation (GD/GG) Impreza, which featured a significant redesign with a more modern and rounded styling compared to the first generation. This generation also saw the continued development and refinement of the WRX performance model in many markets.

Production Plants:

Primary production for the 2001 Impreza typically occurred at Subaru's main manufacturing facilities in Japan, such as the Gunma Manufacturing Division (Ota, Gunma Prefecture).

Model Year Introduction:

The second generation Impreza (GD/GG) was introduced for the 2001 model year in Japan, with wider global releases in late 2000 and early 2001.

🏆 Awards & Recognition

Recognized For:

The Impreza WRX variant, in particular, garnered numerous awards and positive reviews for its performance, rally-inspired handling, and value proposition in the performance sedan market during its production run.

Competitor Comparisons:

Often praised for its standard AWD system and driving dynamics, frequently outperforming competitors in inclement weather and in spirited driving scenarios. The manual helps owners maintain these specific advantages.