Market Position:
The 1998 Subaru Liberty (5th Generation Legacy) represented Subaru's commitment to AWD, safety, and comfort in the mid-size sedan and wagon segment. It competed against established players like the Toyota Camry, Holden Commodore, and Ford Falcon.
Competitive Analysis:
Key differentiators for the Liberty included its standard Symmetrical All-Wheel Drive system, horizontally opposed boxer engines offering a low center of gravity, and a reputation for durability. This manual provides the essential data for maintaining and repairing these unique Subaru characteristics.
Key Features:
Standard AWD, boxer engine, comfortable ride, available wagon and sedan body styles, robust build quality.
Engine:
Engine mechanical, lubrication, cooling, fuel, ignition, exhaust, engine management systems (ECU, sensors, actuators)
Transmission:
Automatic and Manual Transmission repair, operation, diagnosis, fluid service
Drivetrain:
All-Wheel Drive (AWD) system, differential service, driveshafts, CV joints
Suspension:
Front and rear suspension components, alignments, shock absorbers, springs, bushings
Steering:
Power steering system, steering rack, tie rods, steering column
Brakes:
Brake system diagnosis, repair, hydraulic components, ABS system
Electrical:
Wiring diagrams, charging system, starting system, lighting, power windows, central locking, interior electronics
HVAC:
Heating, Ventilation, and Air Conditioning (HVAC) system diagnosis and repair
Body:
Body panel removal and installation, interior trim, glass, bumpers
Safety Systems:
Airbag system (SRS) precautions and components
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, tune-ups
Repair:
Component diagnosis, removal, installation, and adjustment for all major systems
Troubleshooting:
Diagnostic procedures, fault code interpretation, symptom-based troubleshooting guides
Diagnostics:
OBD-II diagnostics, sensor testing, circuit testing
Specifications:
Torque specifications, clearances, fluid capacities, electrical values
Technical Depth:
Comprehensive, suitable for professional technicians and experienced DIY enthusiasts. Covers everything from basic maintenance to complete engine and transmission overhauls.
Engine Codes:
EJ251 (2.5L SOHC NA), EJ202 (2.0L SOHC NA - less common in Australia for this generation), EJ25D (2.5L DOHC NA - rare), EJ25TT (2.5L DOHC Twin-Turbo - GT models)
Displacement:
2.5 Liters (for most common variants)
Configuration:
Naturally Aspirated Boxer-4 Cylinder (most common), Turbocharged Boxer-4 Cylinder (GT models)
Horsepower:
Approx. 165-170 hp (for 2.5L NA), 240-270 hp (for EJ25TT Twin-Turbo GT models)
Torque:
Approx. 155-160 lb-ft (for 2.5L NA), 240-280 lb-ft (for EJ25TT Twin-Turbo GT models)
Fuel Injection:
Multi-point Fuel Injection (MPI)
Fuel Type:
Unleaded Gasoline (91 RON minimum recommended)
ECU Type:
Subaru proprietary ECU
Timing Belt Interval:
Refer to manual for specific interval, typically 60,000 to 90,000 miles or 5-7 years
Transmission Type:
4-speed Automatic (4EAT), 5-speed Manual
Optional Transmission:
5-speed Automatic (5EAT - less common in this generation), 6-speed Manual (for GT-B/STI variants)
Drivetrain Type:
Symmetrical All-Wheel Drive (AWD) standard on most models
AWD System Type:
Viscous coupling center differential with open front and rear differentials (manual) or electronically controlled AWD with viscous coupling center differential (automatic)
Automatic Transmission Fluid:
Subaru ATF-HP or equivalent (check manual for exact specification, e.g., Dexron II/III may be acceptable for older fills)
Manual Transmission Fluid:
API GL-5, SAE 75W-90 (check manual for exact specification)
Differential Fluid:
API GL-5, SAE 75W-90 (check manual for exact specification)
Length:
Approx. 4715-4755 mm (Sedan/Wagon)
Height:
Approx. 1430-1490 mm (Sedan/Wagon)
Wheelbase:
Approx. 2630 mm
Curb Weight:
Approx. 1400-1550 kg (depending on body style and drivetrain)
Gross Vehicle Weight Rating:
Refer to vehicle placard
Cargo Volume:
Sedan: Approx. 420-450 Liters; Wagon: Approx. 470-500 Liters (seats up)
Safety Ratings:
Information from 1998 may not be directly comparable to modern standards. Generally considered a safe vehicle for its era with a robust chassis.
Active Safety:
All-Wheel Drive (AWD), optional ABS (Anti-lock Braking System)
Passive Safety:
Front airbags (driver and passenger), side-impact door beams, crumple zones, seatbelt pre-tensioners
Infotainment System:
Basic AM/FM stereo with CD player or cassette tape, power antenna, optional premium audio system.
Driver Assistance Features:
ABS (Anti-lock Braking System) was optional on some models.
Connectivity:
Limited by modern standards. Primarily focused on basic vehicle functions.
Comfort Features:
Power windows, power door locks, remote keyless entry (optional), climate control (manual or automatic), cruise control.
Oil Change Interval:
Typically 5,000-7,500 miles or 6 months (refer to manual for exact recommendation)
Air Filter Replacement:
Refer to manual, typically 15,000-30,000 miles
Spark Plug Replacement:
Refer to manual, typically 30,000-60,000 miles depending on plug type
Engine Oil Capacity:
Approx. 4.5 Liters (4.8 US Quarts) for 2.5L engine (with filter)
Engine Oil Viscosity:
10W-30 or 5W-30 (refer to manual for seasonal recommendations, e.g., SAE 5W-30 is often recommended for colder climates)
Coolant Type:
Subaru Super Coolant (blue) or equivalent silicate-free, OAT-based antifreeze (typically 50/50 mix with distilled water)
Brake Fluid Type:
DOT 3 or DOT 4 (refer to manual)
Known Issues:
Head gasket leaks (especially on early EJ25 DOHC), oil leaks from valve covers and oil pan, potential for rear main seal leaks, catalytic converter issues, automatic transmission wear (especially if fluid not changed regularly), suspension component wear (bushings, ball joints).
Common Repairs:
Head gasket replacement, timing belt and water pump replacement, front strut replacement, front sway bar link replacement.
Brand Heritage:
Subaru, a division of Fuji Heavy Industries, has a long history of producing reliable vehicles, often with a focus on AWD and boxer engines. This heritage is built on innovation and performance.
Model Evolution:
The 1998 Liberty (Fifth Generation Legacy) marked a significant redesign from its predecessor. It featured a more aerodynamic design, improved interior space, and enhanced safety features. This generation introduced the more powerful EJ25D and EJ25TT engines to a wider audience.
Production Years:
1998-2003 (for this generation)
Manufacturing Locations:
Japan