Segment:
Compact / Sport Compact
Reputation:
Known for its Symmetrical All-Wheel Drive (AWD) system and rally-inspired performance
Competitors:
Honda Civic, Mazda3, Mitsubishi Lancer, Toyota Corolla
AWD:
Standard Symmetrical All-Wheel Drive on most models
Engine Options:
Naturally aspirated and turbocharged boxer engines
Body Styles:
Available as Sedan and Hatchback (Sportwagon)
Engine:
Complete overhaul, diagnosis, tuning, performance modifications
Transmission:
Manual and Automatic transmissions, clutch systems, drivetrain
Braking System:
ABS, EBD, brake calipers, rotors, pads, hydraulic systems, parking brake
Suspension:
Struts, shocks, springs, control arms, bushings, alignment procedures
Steering:
Power steering system, steering rack, tie rods, wheel alignment
Electrical:
Wiring diagrams, ECU, sensors, lighting, starter, alternator, battery
Fuel System:
Fuel pump, injectors, fuel lines, emissions control
Cooling System:
Radiator, water pump, thermostat, coolant specifications
Exhaust System:
Catalytic converter, mufflers, exhaust manifold
Body And Trim:
Body panels, doors, interior trim, glass replacement
HVAC:
Air conditioning, heating, climate control system diagnosis and repair
Maintenance:
Oil change, filter replacement, spark plug replacement, fluid checks
Diagnostics:
OBD-II troubleshooting, fault code interpretation, sensor testing
Repair:
Component replacement, system overhauls, body repair procedures
Troubleshooting:
Step-by-step guides for common and uncommon issues
Rebuilds:
Engine and transmission rebuild procedures with torque specifications
Installation:
Aftermarket part installation guidelines, accessory fitting
Depth:
Comprehensive: from basic maintenance to advanced diagnostics and complete rebuilds
Engine Code:
EJ253 (Naturally Aspirated)
Displacement:
2.5 Liters (2457 cc)
Configuration:
Horizontally Opposed (Boxer) 4-cylinder
Valvetrain:
DOHC, 16 Valves
Horsepower Approx:
173 hp @ 5600 rpm (EJ253)
Torque Approx:
166 lb-ft @ 4000 rpm (EJ253)
Turbocharged Engine Code:
EJ255 (WRX models)
Turbocharged Displacement:
2.5 Liters (2457 cc)
Turbocharged Horsepower Approx:
224 hp @ 5600 rpm (WRX)
Turbocharged Torque Approx:
226 lb-ft @ 3600 rpm (WRX)
Injection Type:
Multi-point Fuel Injection (MPI)
Fuel Type:
Unleaded Gasoline (87 Octane Minimum)
Timing Belt Replacement Interval:
Refer to manual for specific interval, typically 105,000 miles or 7 years
Spark Plug Type:
Iridium Long Life (e.g., NGK Iridium)
Type:
5-Speed Manual Transmission
Type:
4-Speed Automatic Transmission
AWD System:
Symmetrical All-Wheel Drive with viscous coupling center differential
Manual Transmission Fluid Spec:
Subaru Extra S.G. Gear Oil (75W-90) or equivalent GL-5
Automatic Transmission Fluid Spec:
Subaru ATF HP (Automatic Transmission Fluid)
NHTSA Frontal Driver:
Good
NHTSA Frontal Passenger:
Good
IIHS Frontal Offset:
Good
ABS:
Standard Anti-lock Braking System
Ebd:
Standard Electronic Brake-force Distribution
Traction Control:
Available Traction Control System (TCS)
Airbags Front:
Dual Frontal Airbags
Airbags Side:
Available Front Side-Impact Airbags and Curtain Airbags
Seatbelts:
3-point front and rear seatbelts with pretensioners
Oil Change Interval:
Every 3,750 miles or 6 months (severe conditions) / 7,500 miles or 12 months (normal conditions)
Engine Air Filter Replacement:
Every 15,000 miles or 12 months
Cabin Air Filter Replacement:
Every 15,000 miles or 12 months
Brake Fluid Replacement:
Every 30,000 miles or 24 months
Transmission Fluid Replacement:
Manual: Every 30,000 miles. Automatic: Every 30,000 miles (severe) / 60,000 miles (normal)
Engine Oil Type:
SAE 0W-20 or 5W-30 (API SG or higher)
Engine Oil Capacity:
Approx. 4.8 US quarts (with filter change)
Coolant Type:
Subaru Super Coolant (Blue) or equivalent HOAT coolant
Head Gaskets:
While less prevalent than earlier generations, head gasket leaks can still occur. The manual will detail inspection and replacement.
Clutch Wear:
Manual transmission clutches may wear faster with aggressive driving. Procedures for clutch inspection and replacement are detailed.
Suspension Bushings:
Wear on suspension bushings can lead to clunking noises and handling issues. Manual covers diagnosis and replacement.
Marque Focus:
Subaru, known for its distinctive boxer engines and Symmetrical All-Wheel Drive systems since the 1970s.
Generation Start:
The 2006 Impreza is part of the third generation (G11), introduced for the 2002 model year and received a significant facelift for 2004.
Performance Variants:
The WRX model continued to be a high-performance variant with a turbocharged engine and sport-tuned suspension.
Manufacturing Location:
Japan (Gunma Prefecture)
