Comprehensive wiring schematics for all vehicle electrical systems
Technical Depth
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
File Format
Format:
Portable Document Format (PDF)
Searchability:
Likely searchable text for quick information retrieval.
Print Quality
Printability:
Printable, allowing users to print specific pages or sections as needed.
Binding Type
Digital Binding:
N/A (Digital Download)
Paper Type
Digital Paper Type:
N/A (Digital Format)
⚙️ Engine Specifications
Primary Engine
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
Performance Engine
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 System
Fuel Delivery:
Multi-point Fuel Injection (MPI)
Fuel Type Recommendation:
Unleaded Gasoline (Octane rating varies by model, premium required for WRX/STI)
🔧 Transmission
Standard
Transmission Type Base:
5-Speed Manual Transmission
Optional
Transmission Type Optional:
4-Speed Automatic Transmission
Features
Drivetrain:
Symmetrical All-Wheel Drive (AWD) standard on most trims.
AWD System:
Center Viscous Coupling (VC) on manual transmissions, electronically controlled AWD on automatics.
Varies by trim and body style, typically 2900-3300 lbs
Towing Capacity:
Generally not recommended for towing.
🛡️ Safety Features
Ratings
NHTSA Front Impact:
Good (for 2001-2002 models, specific ratings may vary)
NHTSA Side Impact:
Good (for 2001-2002 models, specific ratings may vary)
Active Features
ABS:
Anti-lock Braking System (ABS) available or standard on most trims.
Traction Control:
Traction Control System (TCS) available on some models.
Passive Features
Airbags:
Front airbags standard, side airbags available on some trims.
Seatbelts:
Three-point seatbelts with pretensioners.
💡 Technology Features
Infotainment
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.
Driver Assistance
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.
Connectivity
Auxiliary Input:
No standard auxiliary audio input; aftermarket solutions often required for modern device connectivity.
Bluetooth:
Not available from the factory.
🔧 Maintenance
Service Intervals
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.
Fluid Specifications
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.
Known Issues
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
Brand Heritage
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.
Model Evolution
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.
Production
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
Recognitions
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.
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