Segment:
Mid-size sedan/wagon, performance-oriented variant
Competitors:
Mitsubishi Galant VR-4, Nissan Maxima, Toyota Camry
Distinctive Features:
Standard Symmetrical All-Wheel Drive, turbocharged engines (in many B4 variants), sporty handling
Value:
Essential for owners and independent mechanics seeking to maintain and repair this performance-oriented Subaru model.
Powertrain:
Engine mechanical, fuel system, ignition system, cooling system, exhaust system, lubrication system
Drivetrain:
Manual transmission, automatic transmission, front differential, rear differential, driveshafts, AWD system
Suspension Steering:
Front suspension, rear suspension, steering system, power steering
Brakes:
Brake system, ABS (Anti-lock Braking System), brake components, hydraulic system
Electrical:
Wiring diagrams, battery, charging system, starting system, lighting system, instrumentation, comfort controls
Body:
Exterior panels, interior trim, doors, windows, body sealing, chassis
Maintenance:
Scheduled maintenance, fluid changes, filter replacements, inspections
Troubleshooting:
Diagnostic charts, symptom-based troubleshooting, fault code interpretation
Repair:
Component removal and installation, overhaul procedures, adjustments
Diagnostics:
Engine control module (ECM) diagnostics, sensor testing, actuator testing
Depth:
Comprehensive (from basic maintenance to complete engine and transmission rebuilds)
Engine Codes:
EJ20, EJ22, EJ25 (specific to B4 variants, including turbo variants like EJ20G)
Horsepower Range:
125-220 HP (Naturally Aspirated and Turbocharged variants)
Torque Range:
137-275 lb-ft (Naturally Aspirated and Turbocharged variants)
Fuel Delivery:
Electronic Fuel Injection (EFI), Turbocharged models feature sequential multi-point fuel injection
Layout:
Horizontally-opposed (Boxer)
Turbo Models:
Many B4 variants were turbocharged, significantly enhancing performance.
Transmission Type:
5-speed Manual Transmission
Transmission Type:
4-speed Automatic Transmission
Drivetrain System:
Symmetrical All-Wheel Drive (AWD) standard across most trims.
Manual Transmission Fluid:
API GL-5, SAE 75W-90 (typical specification)
Automatic Transmission Fluid:
Dexron-III or equivalent (typical specification)
Body Styles:
4-door Sedan, 5-door Wagon
Wheelbase:
Approx. 104.3 inches (2649 mm)
Length:
Approx. 178.7 - 183.1 inches (4539 - 4651 mm) depending on body style
Width:
Approx. 67.3 - 68.5 inches (1709 - 1740 mm)
Height:
Approx. 55.5 - 58.3 inches (1410 - 1481 mm) depending on body style
Curb Weight Range:
Approx. 3000 - 3300 lbs (1360 - 1500 kg)
NHTSA Ratings:
Varies by specific model year and testing protocols of the era. Not directly comparable to modern ratings.
ABS:
Available on many models, especially higher trims and turbocharged variants.
AWD:
Standard Symmetrical All-Wheel Drive contributes to enhanced traction and stability.
Airbags:
Driver and front passenger airbags were becoming standard during this period. Side airbags were not common.
Seatbelts:
Three-point seatbelts for all occupants.
Oil Change Interval:
Typically every 3,000-5,000 miles or 3-6 months (refer to manual for precise recommendation based on driving conditions).
Timing Belt Replacement:
Critical for EJ series engines. Typically recommended every 60,000-90,000 miles or 5-7 years. Refer to manual for specific mileage.
Engine Oil:
API SG/SH or higher, SAE 10W-30 or 5W-30 (check manual for exact viscosity based on ambient temperature).
Coolant:
Ethylene glycol based coolant, typically a 50/50 mix with distilled water. Consult manual for specific Subaru coolant type.
Brake Fluid:
DOT 3 or DOT 4.
Power Steering Fluid:
Dexron-II/III or equivalent (check manual).
Head Gaskets:
While more prevalent in later EJ engines, early models can experience head gasket leaks. The manual will detail inspection and replacement procedures.
Turbocharger Maintenance:
Turbocharged models require meticulous maintenance, including regular oil changes and ensuring proper cool-down periods. Manual covers turbo servicing.
Suspension Wear:
Typical for vehicles of this age, components like bushings and ball joints may require replacement. Manual provides inspection and replacement guides.
Subaru Legacy Origin:
Subaru has a long history of building reliable, AWD vehicles, a tradition continued with the Legacy.
First Gen Introduction:
The first generation Subaru Legacy was introduced in 1989, replacing the Subaru Leone.
B4 Significance:
The 'B4' designation often refers to the sedan body style, and frequently encompasses the turbocharged performance variants (like the GT and RS models).
Production Years:
1989-1994 (for this manual's coverage)
Manufacturing:
Primarily manufactured in Japan.
