Model Variant:
Second generation (GD/GG chassis), including 2.5 RS, TS, Outback Sport, and WRX
Production Years Covered:
2001-2002
Manual Type:
Factory service manual supplement
Target Audience:
Compact car buyers seeking all-wheel-drive capability in an affordable package; enthusiasts drawn by the WRX rally heritage
Competitive Advantage:
Standard symmetrical full-time all-wheel drive and turbocharged performance in the WRX, rare among compact competitors of the era
Key Features:
Boxer engine architecture, low center of gravity, all-wheel-drive drivetrain, rally-bred WRX variant introduced for 2002 in the US market
Engine:
EJ series boxer engines including the 2.5L naturally aspirated EJ253 and turbocharged EJ205 (WRX)
Fuel and Emissions:
Multi-point fuel injection, sequential fuel injection, emissions control systems
Transmission:
5-speed manual and 4-speed automatic transmissions, AWD transfer mechanisms
Drivetrain:
Full-time all-wheel drive, center differential, viscous coupling, front and rear differentials
Suspension:
Front MacPherson strut, rear MacPherson strut, wheel alignment procedures
Brakes:
Front and rear disc brakes, ABS, parking brake
Steering:
Hydraulic power-assisted rack and pinion steering
HVAC:
Heating, ventilation, and manual or automatic air conditioning systems
Electrical:
Wiring diagrams, starting and charging systems, lighting, gauges, and accessories
Diagnostics:
Symptom-based troubleshooting, DTC reading and clearing, on-board diagnostic procedures
Removal and Installation:
Step-by-step removal, inspection, and installation procedures for major components
Disassembly and Reassembly:
Detailed engine, transmission, and component teardown and rebuild sequences
Adjustments:
Valve clearance, belt tension, alignment, and idle speed adjustment procedures
Tightening Torques:
Fastener torque specifications throughout all procedures
Technical Depth and Parts
Technical Depth:
Written to factory level for professional technicians; assumes use of special service tools where required
Wiring Diagrams:
Complete wiring schematics and connector pin-out charts for 2001-2002 model changes
Parts Information:
Specifications, wear limits, and service data tables for component inspection
Special Tools:
Special service tool numbers listed where applicable
Supplement Format:
Covers 2001-2002 changes; use in conjunction with the applicable base Impreza service manual
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Primary Engine:
2.5L H4 (EJ253) naturally aspirated boxer engine
Engine Options Range:
2.5L NA (2.5 RS, TS, Outback Sport) through 2.0L turbocharged (WRX, EJ205)
Configuration:
Horizontally opposed 4-cylinder, aluminum block and heads
Valvetrain:
SOHC with 4 valves per cylinder (NA models)
WRX Power:
Approximately 227 hp at 6,000 rpm (US-market 2002 WRX)
WRX Torque:
Approximately 221 lb-ft at 3,600 rpm
2.5 RS Power:
Approximately 165 hp (2001-2002 2.5 RS)
Fuel Delivery:
Multi-point sequential fuel injection
Fuel Type:
Premium unleaded recommended for WRX turbo; regular unleaded for NA models
Fuel Tank Capacity:
Approximately 13.2 gallons
Standard Transmission:
5-speed manual transmission with full-time all-wheel drive
Optional Transmission:
4-speed electronic automatic transmission with AWD
AWD System:
Continuous all-wheel drive; viscous-coupling center differential on manual models, adaptive transfer clutch on automatic models
Differential:
Rear limited-slip differential available on performance models
Crash Test Information:
N/A - specific ratings not listed in this supplement
Active Features:
4-wheel disc brakes with ABS, all-wheel drive traction
Passive Features:
Dual front airbags, front seatbelt pretensioners, side-impact door beams
Child Safety:
Rear outboard child seat tether anchors (LATCH-era hardware)
Audio System:
AM/FM cassette head unit with optional CD player and multi-speaker audio
Optional Audio:
Upgraded premium audio available on higher trims
Driver Assistance:
N/A - modern driver assistance systems not offered on this model era
Instrumentation:
Analog gauge cluster with tachometer on all models
Oil Change:
Every 3,750 miles or 3.75 months (severe) / 7,500 miles or 7.5 months (normal)
Spark Plugs:
Inspect at 30,000-mile intervals; replace per schedule
Timing Belt:
Replace at 105,000-mile interval on 2.5L engines
Air Filter:
Inspect periodically; replace at approximately 30,000 miles
Engine Oil:
Approximately 4.5 quarts with filter; SAE 5W-30 typical
Coolant:
Subaru long-life coolant; verify concentration before service
Transmission Fluid:
Manual: GL-5 gear oil per specification; Automatic: Dexron III-era ATF
Common Wear Items:
Front brake pads, wheel bearings, and head gaskets are known service considerations on EJ-series engines of this era
