Segment:
Performance Compact Sedan/Hatchback
Usp:
All-wheel drive, turbocharged performance, rally heritage.
Competitors 2006 2007:
Mitsubishi Lancer Evolution, Subaru WRX (non-STi), Volkswagen GTI, Mazdaspeed3, Honda Civic Si.
Performance Focus:
Designed for enthusiasts seeking high-performance driving and track capability.
Technical Documentation:
Provides factory-level diagnostic and repair procedures.
Powertrain:
Engine (EJ257/EJ207), Fuel System, Ignition System, Exhaust System, Cooling System, Lubrication System
Drivetrain:
Transmission (6-speed manual), Drivetrain Components (DCCD, differentials), Axles, Driveshafts
Chassis Suspension:
Front & Rear Suspension (MacPherson strut front, multi-link rear), Steering System, Wheel Bearings
Brakes:
Brake System (ABS, hydraulic components), Brake Pad/Rotor Replacement, Caliper Overhaul
Electrical:
Wiring Diagrams, Fuses & Relays, Lighting System, Power Windows, Locks, Audio System, ECU Diagnosis
Body And Interior:
Body Panels, Doors, Windows, Seats, Upholstery, HVAC System
Routine Maintenance:
Oil Changes, Filter Replacements, Spark Plug Service, Fluid Checks & Replacements
Diagnostic Troubleshooting:
Error Code Interpretation, Component Testing, System Malfunction Analysis
Major Repairs:
Engine Rebuilds, Transmission Overhaul, Turbocharger Service, Suspension Component Replacement
Electrical Diagnostics:
Wiring Harness Repair, Sensor Diagnosis, ECU/TCU Reprogramming (if applicable)
Depth:
Comprehensive: Covers everything from basic fluid changes to full engine and transmission rebuilds.
Detail Level:
Includes detailed pictures and diagrams for step-by-step guidance.
Engine Type Usdm:
2.5L Flat-4 Turbocharged DOHC (EJ257)
Engine Type Jdm:
2.0L Flat-4 Turbocharged DOHC (EJ207 - varies)
Horsepower Usdm Ej257:
300 hp @ 6200 RPM (approx.)
Torque Usdm Ej257:
300 lb-ft @ 4000 RPM (approx.)
Horsepower Jdm Ej207:
280 PS (276 hp) @ 6400 RPM (often quoted, actual higher in some tunes)
Torque Jdm Ej207:
333 Nm (246 lb-ft) @ 4400 RPM (often quoted)
Fuel Delivery:
Sequential Multiport Fuel Injection (PGM-FI)
Fuel Type:
Premium Unleaded Gasoline (91 Octane or higher recommended)
Turbocharger:
IHI VF39 (USDM), IHI VF36/VF37 (JDM variations)
Transmission Type:
6-Speed Manual Transmission
AWD System:
Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD)
Dccd Operation:
Automatic and Manual modes for differential lock-up control.
Manual Transmission Fluid:
Subaru Extra-S (or equivalent GL-5 75W-90 synthetic)
Length:
Approx. 4,415 mm (173.8 in)
Width:
Approx. 1,770 mm (69.7 in)
Height:
Approx. 1,425 mm (56.1 in)
Curb Weight:
Approx. 1,470 kg (3,240 lbs)
Wheelbase:
Approx. 2,625 mm (103.3 in)
NHTSA Front Impact:
5-Star (for relevant models/testing)
IIHS Side Impact:
Good (for relevant models/testing)
ABS:
Standard Anti-lock Braking System
Traction Control:
Standard
Stability Control:
Subaru Vehicle Dynamics Control (VDC) - Standard
Airbags:
Driver and Passenger Front Airbags, Side Airbags, Curtain Airbags
Seatbelts:
3-point ELR seatbelts with pretensioners and force limiters
Oil Change Interval:
Every 3,750 miles or 6 months (severe duty), 7,500 miles or 12 months (normal duty). Consult manual for specifics.
Timing Belt Replacement:
105,000 miles or 105 months (or as per manual, crucial for EJ engines).
Spark Plug Replacement:
Every 30,000 - 60,000 miles depending on plug type (iridium recommended).
Engine Oil Type:
5W-30 Synthetic (API SN or higher recommended)
Engine Oil Capacity:
Approx. 4.8 US quarts (4.5 liters) with filter change.
Coolant Type:
Subaru Super Coolant (Blue) or equivalent HOAT coolant.
Head Gaskets:
While less common on EJ257 than earlier EJ25 models, always a point of inspection. Manual covers diagnostic procedures.
Piston Slap:
Can occur on some EJ engines, particularly when cold. Manual provides diagnostic steps.
Clutch Wear:
Performance driving can accelerate clutch wear. Manual details clutch replacement.
Rally Connection:
Direct lineage from Subaru's World Rally Championship success.
Generation Gdb:
Third generation Impreza (2002-2007), with the WRX STi being the pinnacle performance variant.
Updates 2006 2007:
Mid-cycle refresh (GH/GE model generation), significant chassis and styling updates compared to earlier GDB models.
Manufacturing Location:
Gunma Plant, Japan
