Segment:
Performance Compact Sedan/Coupe (rally-bred homologation special)
Key Rivals:
Mitsubishi Lancer Evolution (early generations), Ford Escort RS Cosworth, Toyota Celica GT-Four, Nissan Pulsar GTI-R
Performance Focus:
Iconic turbocharged boxer engine, symmetrical all-wheel drive, precise handling characteristics, rally heritage.
Target Audience:
Enthusiasts, tuners, rally fans, drivers seeking a high-performance AWD experience.
Owner Benefit:
Empowers owners and independent mechanics with factory-level diagnostic and repair knowledge for maintaining and optimizing the WRX.
Continent Focus:
Global (primarily JDM, European, Australian)
Estimated Pages:
Hundreds (official factory documentation varies, often 1000+ pages when compiled)
Type:
Workshop Service Repair Manual (FSM - Factory Service Manual equivalent)
Language:
English (likely translated from Japanese, common for JDM imports)
Format:
Digital Download (PDF)
Powertrain:
Engine (EJ20G, EJ205), Transmission (manual & automatic variants), Drivetrain (AWD system, differentials)
Chassis:
Suspension (front struts, rear multi-link), Steering (power assist), Brakes (front ventilated discs, rear discs), Wheels & Tires
Electrical:
Wiring diagrams, lighting, ignition system, charging system, starting system, ECUs, sensors, audio system
Body And Interior:
Body panels, doors, windows, interior trim, seats, airbags, climate control, HVAC
Routine Maintenance:
Oil changes, filter replacements, spark plug service, fluid checks and top-offs, belt inspections
Component Diagnosis And Repair:
Engine diagnostics (misfires, overheating), transmission troubleshooting, brake system repair, electrical fault finding, suspension component replacement
Rebuild Procedures:
Engine rebuild specifications, transmission overhaul, differential rebuilding
Troubleshooting Guides:
System-specific troubleshooting flowcharts, diagnostic trouble codes (DTCs) and their meanings
Level Of Detail:
Comprehensive: From basic fluid changes and component replacement to in-depth engine tuning, electrical system diagnostics, and full vehicle disassembly/reassembly.
Diagnostic Information:
Detailed diagnostic procedures, wiring diagrams for troubleshooting, sensor data interpretation.
Special Tools:
Identification and usage of specialized tools required for specific repair procedures.
Engine Type 1:
2.0L Flat-4 (Boxer), DOHC, 16-valve, Turbocharged
Engine Type 2:
2.0L Flat-4 (Boxer), DOHC, 16-valve, Twin-Scroll Turbocharged (later models/specific markets)
Horsepower Ej20G:
Approx. 215-237 hp (depending on market/spec)
Torque Ej20G:
Approx. 200-211 lb-ft (depending on market/spec)
Horsepower Ej205:
Approx. 220-230 hp
Torque Ej205:
Approx. 217-236 lb-ft
Fuel Delivery:
Multi-point Fuel Injection (MPI)
Fuel Type:
Unleaded Gasoline (Premium Recommended/Required)
Turbocharger Type:
Intercooled Turbocharger (TD04-13G or similar for EJ20G, Twin-Scroll for EJ205)
Transmission Type Primary:
5-speed Manual
Transmission Type Optional:
4-speed Automatic (less common on WRX models)
AWD System:
Subaru Symmetrical All-Wheel Drive with Active Torque Split (driver-controlled center differential in manual variants)
Clutch Type:
Single Dry Plate, Hydraulic Operation
Length:
Approx. 4350 mm (171.3 in)
Width:
Approx. 1700 mm (66.9 in)
Height:
Approx. 1425 mm (56.1 in)
Wheelbase:
Approx. 2520 mm (99.2 in)
Curb Weight:
Approx. 1300-1400 kg (2866-3086 lbs), depending on trim and options
Gross Vehicle Weight Rating:
Not typically specified in consumer materials, but critical for service.
Crash Test Data:
Limited specific official NHTSA/Euro NCAP ratings for 1999-2000 WRX models due to JDM focus and era; later generations have more data.
ABS:
Standard (Anti-lock Braking System)
Airbags:
Driver and Passenger Airbags
Seat Belts:
3-point front and rear seat belts, pretensioners for front seats.
Oil Change Interval:
Typically 3,000-5,000 miles (5,000-8,000 km) or 6 months, depending on driving conditions and oil type used.
Timing Belt Replacement:
Refer to manual, but generally around 60,000-100,000 miles (96,000-160,000 km). Critical for EJ series engines.
Engine Oil Type Viscosity:
Refer to manual for specific viscosity (e.g., 10W-30, 5W-30, 5W-40 common for turbocharged applications), API Service SG or higher.
Coolant Type:
Ethylene glycol-based coolant, typically green Subaru Super Coolant or equivalent.
Transmission Fluid Manual:
Refer to manual for GL-4 or GL-5 specification gear oil.
Differential Fluid:
Refer to manual for GL-5 specification gear oil, check center differential type.
Engine Knock Detonation:
Susceptible to detonation if not properly fueled or if ignition timing is off, especially with modifications. Manual addresses causes and diagnostics.
Head Gasket Failure:
Less common than later EJ engines but still a potential issue, especially with high mileage or modifications. Manual details inspection and replacement.
Turbocharger Wear:
Oil starvation or contamination can lead to premature turbo wear. Manual provides lubrication specs and turbo diagnosis.
Suspension Wear:
Bushings and struts can wear out, affecting handling. Manual details inspection and replacement procedures.
Rally Legacy:
Subaru's deep roots and success in the World Rally Championship (WRC) are intrinsically linked to the Impreza WRX's development and reputation.
Generation Gc8:
This period represents the latter half of the first generation (GC/GF/GM) Impreza, with the WRX variant being the performance flagship.
Facelifts And Updates:
The 1999-2000 models often reflect updates from previous years, including chassis stiffening and potential minor engine/turbo upgrades.
Manufacturing Location:
Japan
Production Years:
GC8 chassis: 1992-2000 (with WRX variants throughout)
Performance Accolades:
Consistently praised by automotive journalists for its performance-to-price ratio and rally-inspired driving dynamics.
Enthusiast Cult Following:
The GC8 WRX has a dedicated cult following, making it a sought-after performance icon.
Homologation Status:
Built as a homologation special for Group A/WRC racing, influencing its design and capabilities.
