Segment:
Compact/Small Family Car, Rally-inspired performance variant
Competitors:
Mitsubishi Lancer, Honda Civic, Toyota Corolla, Ford Focus
Drivetrain Offering:
Standard Symmetrical All-Wheel Drive (AWD) across most trims, a key differentiator
Performance Variants:
Presence of WRX and STI (though WRX is more prevalent in 2001 Impreza market context) variants, known for turbocharged performance and rallying heritage
Reliability:
Generally considered reliable, especially the naturally aspirated models, with a strong enthusiast following
Engine:
Comprehensive coverage of EJ20 and EJ25 series engines (naturally aspirated and turbocharged variants)
Transmission:
Manual (5-speed) and Automatic (4-speed) transmissions
Drivetrain:
All-Wheel Drive (AWD) system, differentials, driveshafts, axles
Suspension:
Front and rear suspension components, alignment, shock absorbers, springs, bushings
Brakes:
Front and rear brake systems (disc brakes), ABS, parking brake
Steering:
Power steering system, steering rack, column
Electrical:
Complete electrical diagrams, battery, charging system, ignition system, lighting, accessories, body electronics
HVAC:
Heating, Ventilation, and Air Conditioning (HVAC) system components and operation
Fuel System:
Fuel tank, fuel pump, injectors, fuel pressure regulator
Exhaust System:
Exhaust manifold, catalytic converter, mufflers, pipes
Cooling System:
Radiator, thermostat, water pump, coolant passages
Bodywork:
Body panel removal and installation, interior trim, glass, seals
Maintenance:
Scheduled maintenance, oil changes, filter replacements, tune-ups, fluid checks
Repair:
Detailed step-by-step repair procedures for all major systems and components
Diagnostics:
Troubleshooting guides, fault code interpretation, diagnostic procedures for common issues
Specifications:
Torque specifications, clearances, tolerances, fluid capacities, electrical specifications
Rebuild:
Engine and transmission rebuild procedures
Wiring Diagrams:
Comprehensive electrical wiring diagrams
Depth:
Professional-level, covering everything from basic maintenance to complex engine and transmission overhauls and electrical diagnostics.
Engine Code Na:
EJ22E (2.2L), EJ251 (2.5L SOHC)
Engine Code Turbo:
EJ205 (2.0L Turbocharged DOHC - WRX)
2.2L (Ej22E) Horsepower:
142 hp @ 5600 rpm
2.2L (Ej22E) Torque:
145 lb-ft @ 4000 rpm
2.5L Sohc (Ej251) Horsepower:
165 hp @ 5600 rpm
2.5L Sohc (Ej251) Torque:
166 lb-ft @ 4000 rpm
2.0L Turbo (Ej205 - Wrx) Horsepower:
227 hp @ 5600 rpm (US Spec WRX)
2.0L Turbo (Ej205 - Wrx) Torque:
217 lb-ft @ 4000 rpm (US Spec WRX)
Fuel Injection:
Electronic Fuel Injection (EFI)
Fuel Type:
Unleaded gasoline (87 octane for NA, 91+ octane recommended for WRX)
Configuration:
Horizontally-opposed (Boxer) 4-cylinder
ECU Type:
Engine Control Unit (ECU) with diagnostic capabilities
Transmission Type Na:
5-Speed Manual Transmission (TY7517V)
Transmission Type Auto:
4-Speed Automatic Transmission (4EAT)
Transmission Type Turbo:
5-Speed Manual Transmission (for WRX)
AWD System:
Symmetrical All-Wheel Drive with viscous coupling center differential (manual) or electronically controlled clutch pack (automatic)
Manual Transmission Fluid:
Subaru Extra MT Gear Oil (or equivalent API GL-5, SAE 75W-90)
Automatic Transmission Fluid:
Subaru ATF-HP (or equivalent Dexron III)
Length:
Approx. 4410 mm (Sedan)
Height:
Approx. 1440 mm (Sedan), 1445 mm (Wagon)
Curb Weight:
Approx. 1250-1350 kg (depending on trim and drivetrain)
Wheelbase:
Approx. 2510 mm
Wheel Size:
15-inch, 16-inch, or 17-inch (WRX)
Tire Size:
Commonly 195/60R15, 205/50R16, 215/45R17 (WRX)
NHTSA Front Impact:
4/5 stars (Driver/Passenger)
IIHS Side Impact:
Acceptable (for models tested)
Airbags:
Front airbags (driver and passenger), optional side airbags
Seatbelts:
3-point front and rear seatbelts with pretensioners
ABS:
Anti-lock Braking System (ABS) available on many trims
AWD Benefit:
All-Wheel Drive system provides enhanced traction and stability, particularly in adverse weather conditions.
Oil Change Interval:
Every 3,750 miles (6,000 km) or 3.75 months, whichever comes first (severe conditions); 7,500 miles (12,000 km) or 7.5 months (normal conditions).
Air Filter Replacement:
Every 15,000 miles (24,000 km) or 15 months.
Spark Plug Replacement:
Every 60,000 miles (96,000 km) for platinum-tipped plugs.
Timing Belt Replacement:
Every 90,000 miles (144,000 km) or 7.5 years (for EJ25 SOHC). EJ205 (WRX) also requires timing belt service.
Engine Oil Type:
API SJ or SL, SAE 5W-30 (synthetic recommended for turbo models)
Coolant Type:
Subaru Super Coolant (or equivalent ethylene glycol based with corrosion inhibitors, blue color)
Brake Fluid Type:
DOT 3 or DOT 4
Head Gaskets:
While less prevalent than in some later EJ engines, Subaru's EJ series engines (especially SOHC) can be prone to head gasket leaks over time, particularly if overheated or poorly maintained. The manual will detail inspection and replacement procedures.
Turbo Issues Wrx:
For WRX models, turbocharger longevity can be affected by oil quality, maintenance intervals, and proper warm-up/cool-down procedures. The manual covers turbo inspection and servicing.
Clutch Wear:
Wear on the clutch components is typical for manual transmissions, especially in spirited driving conditions. Manual details clutch inspection, replacement, and flywheel servicing.
Company Origin:
Founded in Japan, with a strong reputation for engineering and rally racing.
Generation:
Second generation (GD chassis) began production in 2000, with 2001 being an early model year.
Design Changes:
Significant redesign from the first generation, featuring a more rounded and aerodynamic profile.
Manufacturing Location:
Japan
Rally Icon:
The Impreza, particularly the WRX variant, cemented Subaru's legacy in global rally championships.