Model Segment:
Compact/Small Family Car (C-segment)
Subaru Brand Image:
Known for Symmetrical All-Wheel Drive (AWD) and boxer engines, rally heritage
Key Competitors:
Honda Civic, Toyota Corolla, Mazda3, Mitsubishi Lancer
Standard AWD:
Exceptional traction and handling advantage in adverse weather
Driver Engagement:
Sporty handling characteristics and responsive steering
Practicality:
Available in sedan and hatchback body styles, offering versatility
Wrx Variants:
Performance-oriented WRX and WRX STI models offer significant enthusiast appeal
Electrical System:
Comprehensive coverage of all major electrical systems
Engine Control Wiring:
Engine Control Module (ECM) and related sensors/actuators
Powertrain Control:
Transmission control, AWD system wiring
Chassis Electrical:
Brakes, power steering, ABS, SRS (Airbag)
Body Electrical:
Lighting (headlights, taillights, interior), power windows, locks, mirrors, wipers, horn
Comfort Convenience:
HVAC controls, audio system, remote keyless entry, alarm system
Instrumentation:
Instrument cluster, warning lights, gauges
Lighting System:
Detailed diagrams for all exterior and interior lights
Safety Systems:
SRS airbag system wiring, seatbelt pre-tensioners
Troubleshooting:
Diagnostic procedures based on wiring circuits
Component Location:
Identification of electrical component locations and connector pinouts
Circuit Analysis:
Understanding the flow of electricity through various circuits
Repair Guidance:
Guidance on repairing damaged wiring harnesses and connectors
Connector Identification:
Detailed diagrams of connectors, terminals, and wire colors
Depth:
Highly detailed, suitable for professional technicians and advanced DIYers
Diagnostic Focus:
Focuses on electrical diagnostics, fault finding, and circuit repair
Engine Code:
EJ253 (Naturally Aspirated), EJ205/EJ207 (Turbocharged for WRX/STI)
Engine Type:
Horizontally-Opposed (Boxer) 4-Cylinder
Displacement Na:
2.5 Liters (2457 cc)
Displacement Turbo:
2.0 Liters (1994 cc) for WRX/STI
Horsepower Na:
Approx. 165-173 hp (depending on sub-model)
Torque Na:
Approx. 166-173 lb-ft
Horsepower Wrx:
Approx. 227 hp
Torque Wrx:
Approx. 217 lb-ft
Horsepower Sti:
Approx. 300 hp
Torque Sti:
Approx. 300 lb-ft
Fuel Delivery:
Multi-Point Fuel Injection (MPFI)
Fuel Type:
Unleaded Gasoline
Recommended Octane:
87 Octane (NA), 91+ Octane (WRX/STI)
Transmission Type:
5-Speed Manual (Standard on most models)
Transmission Type Optional:
4-Speed Automatic (Optional on some NA models)
AWD System:
Symmetrical All-Wheel Drive with Driver-Controlled Center Differential (DCCD) on STI
Gear Ratios:
Specific ratios vary by model and transmission type (detailed in manual)
Transmission Fluid Type:
Subaru Extra-S ATF (Automatic), Subaru Manual Transmission Oil (Manual) - refer to specific viscosities in manual
NHTSA Front Crash Rating:
4 Stars (Driver), 5 Stars (Passenger) for Sedan models
IIHS Side Impact Rating:
Good (Sedan models)
ABS:
Standard on most models
AWD:
Symmetrical All-Wheel Drive enhances stability
Traction Control:
Available on some models
Airbags:
Front airbags, optional side curtain airbags
Seatbelts:
3-point seatbelts with pretensioners
Oil Change Interval:
Every 3,750 miles or 3 months (severe conditions), 7,500 miles or 6 months (normal conditions)
Engine Air Filter:
Inspect every 7,500 miles, replace as needed or every 15,000 miles
Cabin Air Filter:
Replace every 7,500 - 15,000 miles
Spark Plugs:
Replace every 60,000 miles (standard NGK Platinum/Iridium)
Timing Belt Or Chain:
EJ engines typically use timing belts; replace every 105,000 miles or 7 years
Engine Oil Type:
SAE 5W-30 (Synthetic recommended for Boxer engine) - API SN or higher
Engine Oil Capacity:
Approx. 4.8 US quarts (with filter) for 2.5L NA
Coolant Type:
Subaru Super Coolant (Blue) or equivalent OAT/HOAT antifreeze (50/50 mix with distilled water)
Brake Fluid Type:
SAE J1703 or FMVSS No. 116 DOT 3
Head Gaskets:
While less prevalent than earlier Subaru models, some EJ253 engines can experience head gasket leaks. The manual will help diagnose related electrical issues.
Oil Leaks:
Common areas include valve cover gaskets and oil pan gaskets, which can sometimes be related to electrical sensor inputs.
Electrical Gremlins:
Wiring harness issues, faulty grounds, or corroded connectors can lead to intermittent problems, making this wiring diagram manual invaluable.
Turbo Issues Wrx:
EJ205 turbocharger reliability can be affected by maintenance and driving style; the manual provides crucial wiring for turbo sensors and controls.
Subaru Founding:
Founded in 1953, part of Fuji Heavy Industries
Subaru Engineering:
Pioneered boxer engine and AWD integration
Impreza Introduction:
First generation introduced in 1992
Second Gen Launch:
Second generation (GG/GD) launched in 2000 globally, 2002 in North America
Styling Update:
Facelift for the GG/GD generation occurred in 2004, introducing the 'bug eye' to 'hawk eye' redesign
Manufacturing Location:
Japan (Gunma Plant)
