Product Name:
Subaru Impreza Service & Repair Manual 2001-2002 2004-2007
Product Description:
Complete digital service and repair manual written for the Subaru Impreza; Production model years: 2001, 2002, 2004, 2005, 2006, 2007 (18,000+ pages PDF, 695mb, non-scanned)
Platform Codes:
GC8 (pre-facelift 2001-2002), GD/GG (facelift 2004-2007)
Segment:
Compact/Subcompact performance sedan and hatchback, known for its AWD system and rally heritage.
Competitors:
Honda Civic, Toyota Corolla, Mitsubishi Lancer, Mazda3, Volkswagen Golf.
All Wheel Drive:
Standard symmetrical All-Wheel Drive (AWD) system across most trims and engines, a key differentiator.
Engine Options:
Range of Boxer engines, including naturally aspirated and turbocharged variants (WRX/STI).
Performance Variants:
High-performance WRX and WRX STI models offering significant power and sport-tuned chassis.
Demographic:
Enthusiasts, drivers seeking all-weather capability, performance-oriented buyers.
Powertrain:
Engine mechanical, engine control systems (ECU/ECM), fuel injection, ignition, exhaust, turbocharged systems (WRX/STI), transmission (manual & automatic), drivetrain, clutch, differentials (front, center, rear), AWD system.
Chassis:
Suspension (front MacPherson strut, rear multi-link), steering, braking system (ABS, hydraulic components), wheels, tires, chassis lubrication, body structural analysis.
Electrical:
Wiring diagrams, lighting system, charging system, starting system, ignition system, instrument panel, power windows, power locks, HVAC controls, audio systems, cruise control, safety systems (airbags, seatbelts).
Body:
Exterior body panels, interior trim, seats, doors, windows, sunroof, bumpers, hoods, trunks, HVAC system components, body hardware, corrosion protection.
Maintenance:
Scheduled maintenance (oil changes, filter replacements, fluid checks), lubrication, component inspection, belt replacement, spark plug replacement, air filter replacement, brake pad/rotor replacement.
Troubleshooting:
Diagnostic procedures for engine, transmission, electrical systems, HVAC, brakes, suspension. Troubleshooting charts, fault codes interpretation, common problem diagnosis.
Repair:
Step-by-step repair instructions for all major components and systems, including engine rebuilds, transmission overhauls, brake caliper replacement, suspension arm replacement, electrical component repair.
Diagnostics:
OBD-II diagnostics, sensor testing, actuator testing, component resistance and voltage checks, scan tool usage, specific diagnostic routines for Subaru ECUs.
Depth:
Comprehensive (from basic maintenance to full engine and transmission rebuilds, advanced electrical diagnostics and chassis component replacement).
2001-2002 Naturally Aspirated:
2.5L EJ25 SOHC/DOHC Flat-4 (165-175 hp, 166-177 lb-ft torque)
2004-2007 Naturally Aspirated:
2.5L EJ25 SOHC/DOHC Flat-4 (168-175 hp, 166-177 lb-ft torque)
2001-2007 Turbocharged Wrx:
2.0L EJ20 Turbocharged Flat-4 (227-230 hp, 236-241 lb-ft torque)
2004-2007 Turbocharged Wrx:
2.5L EJ25 Turbocharged Flat-4 (230-265 hp, 235-290 lb-ft torque)
2004-2007 Turbocharged Sti:
2.5L EJ25 DOHC Turbocharged Flat-4 (300 hp, 300 lb-ft torque)
Redline Typical:
6500 RPM (NA), 7000 RPM (Turbo)
Injection Type:
Sequential Multi-port Fuel Injection (MPI)
Fuel Type:
Unleaded gasoline (Premium required for WRX/STI)
ECU Type:
Denso or Hitachi ECUs, depending on model year and variant.
Manual Transmissions:
5-speed manual (early models), 6-speed manual (STI models and later WRX).
Automatic Transmissions:
4-speed automatic transmission (available on non-turbo models).
AWD Coupling:
Viscous coupling center differential (manual), electronically controlled multi-plate transfer clutch (automatic), DCCD (Driver Controlled Center Differential) on STI models.
Manual Transmission Fluid Spec:
Subaru Extra-S Gear Oil (75W-90 GL-5) or equivalent.
Automatic Transmission Fluid Spec:
Subaru ATF HP or equivalent.
Length Inches:
173.4 - 176.2 (sedan), 169.7 - 170.9 (wagon)
Width Inches:
66.7 - 68.1
Height Inches:
55.5 - 56.1
Curb Weight Lbs:
2900 - 3300 (approximate, varies by trim and drivetrain)
Common Tire Sizes:
205/50R16, 215/45R17, 225/45R17 (WRX), 235/40R18 (STI)
Bolt Pattern:
5x100mm (most models), 5x114.3mm (STI models)
NHTSA Front Impact:
Good (for applicable models and years)
IIHS Side Impact:
Acceptable or Good (varies by year and specific test)
ABS:
Standard Anti-lock Braking System (ABS) across most trims.
Airbags:
Front dual-stage airbags, optional side-impact airbags, optional curtain airbags (later models).
Seatbelts:
Three-point seatbelts with pretensioners and load limiters.
Oil Change Interval Miles:
3,750 - 7,500 miles (depending on driving conditions and oil type)
Spark Plug Replacement Miles:
60,000 - 105,000 miles (depending on spark plug type: copper, platinum, iridium)
Timing Belt Replacement Miles:
105,000 miles (for EJ20/EJ25 engines with timing belts)
Engine Oil Capacity Quarts:
4.5 - 5.0 (depending on engine)
Engine Oil Type:
5W-30 or 10W-30 (API certified, check manual for specific viscosity and API service category)
Coolant Type:
Subaru Super Coolant (Blue) or equivalent OAT/HOAT antifreeze (50/50 mix with distilled water).
Brake Fluid Type:
DOT 3 or DOT 4
Head Gaskets:
While less prevalent than on earlier EJ engines, head gasket leaks can occur, particularly on high-mileage or poorly maintained EJ25 SOHC engines.
Turbocharger Failure:
Can occur on WRX/STI models due to oil starvation, overheating, or aggressive driving without proper cool-down periods.
Clutch Wear:
Accelerated wear on manual transmission clutches can occur with aggressive driving or frequent towing.
Suspension Components:
Wear on bushings, ball joints, and struts is common with age and mileage, especially on performance models.
Subaru Motorsports:
Strong association with rallying (WRC championships with Colin McRae and Petter Solberg), contributing to Impreza's performance image.
First Generation Gc Gf:
Launched in 1992, known for its compact size, AWD, and sporty variants (GT Turbo, WRX).
Second Generation Gd Gg:
Introduced in 2000 (globally) / 2002 (USDM), featured a distinctive 'bug-eye' design initially, which was updated to 'hawk-eye' and 'dog-eye' in subsequent facelifts.
Manufacturing Locations:
Japan (Ota, Gunma Prefecture)
Key Facelifts:
2002 (USDM introduction, 'bug-eye' to 'hawk-eye'), 2005 ('hawk-eye' to 'dog-eye'/'griffin' style).
