Vehicle Segment:
Mid-size sedan, known for its all-wheel-drive (AWD) system as standard on most trims.
Key Competitors 2003:
Toyota Camry, Honda Accord, Nissan Altima, Ford Fusion, Mazda6.
Defining Features:
Standard Symmetrical All-Wheel Drive (AWD), horizontally-opposed 'Boxer' engines, reputation for durability and safety.
Benefits For Owner:
Empowers owners and technicians with comprehensive factory-documented procedures, enabling accurate diagnosis, repair, and maintenance, ultimately saving time and money.
Primary Coverage:
Complete factory service, repair, and workshop procedures for the 2003 Subaru Legacy.
Secondary Coverage:
Includes maintenance, troubleshooting, diagnostics, and component replacement.
Estimated Page Count:
N/A (Digital PDF, content is extensive)
Manual Type:
Factory Service Manual / Repair Manual / Workshop Manual
Powertrain:
Engine mechanical (block, heads, pistons, rings, rods, crankshaft, bearings, valve train), ignition system, fuel system, lubrication system, cooling system, exhaust system, transmission (automatic and manual), clutch, drivetrain (front and rear axles, CV joints).
Chassis:
Suspension (front and rear), steering system, brakes (front and rear discs, hydraulic system, ABS), wheels, tires, chassis.
Electrical:
Wiring diagrams, engine control module (ECM), body control module (BCM), lighting (headlights, taillights, interior), audio system, climate control, power accessories, sensors, relays, fuses.
Body And Interior:
Body panels, doors, windows, seats, dashboard, interior trim, airbags, body seals, glass, fuel filler neck.
Maintenance:
Routine oil changes, fluid replacements (transmission, coolant, brake, power steering), filter replacements (oil, air, fuel), spark plug replacement, tire rotation, brake pad replacement, belt inspections and replacement.
Repair:
Engine rebuilds, cylinder head repair, piston and ring replacement, crankshaft and bearing replacement, transmission overhaul, clutch replacement, brake caliper and rotor replacement, suspension component replacement (shocks, struts, ball joints), steering rack replacement, electrical component diagnosis and replacement, body panel repair, glass replacement.
Diagnostics:
Troubleshooting guides for common symptoms, diagnostic trouble codes (DTCs), electrical system testing, fuel system pressure testing, component testing procedures.
Specifications:
Torque specifications for all fasteners, fluid capacities, fluid types and specifications, electrical resistance values, diagnostic parameters.
Depth:
Comprehensive, covering everything from basic maintenance to complete engine and transmission rebuilds, detailed electrical schematics, and body repair procedures. Factory-level detail.
Engine Option 1:
2.5L H4 (EJ253) SOHC
Engine Option 1 Horsepower:
165 hp @ 5600 rpm
Engine Option 1 Torque:
170 lb-ft @ 4000 rpm
Engine Option 2:
3.0L H6 (EZ30D) DOHC
Engine Option 2 Performance
Engine Option 2 Horsepower:
212 hp @ 6000 rpm
Engine Option 2 Torque:
207 lb-ft @ 4200 rpm
Fuel Delivery:
Electronic Multi-Port Fuel Injection (MPI)
Engine Configuration:
Horizontally-opposed (Boxer)
Timing Drive:
Timing Belt (2.5L SOHC), Timing Chain (3.0L DOHC)
Spark Plugs:
NGK PLFR5A-11 (or equivalent, specific to engine type)
Transmission Type Standard:
4-Speed Automatic (All-Wheel Drive)
Transmission Type Optional:
5-Speed Manual (All-Wheel Drive)
AWD System:
Subaru Symmetrical All-Wheel Drive (AWD)
Automatic Transmission Fluid:
Subaru ATF-HP (or equivalent, e.g., Dexron III/Mercon)
Manual Transmission Fluid:
API GL-5, 75W-90 Gear Oil
NHTSA Front Impact Driver:
Good
NHTSA Front Impact Passenger:
Good
IIHS Moderate Overlap Front:
Good
ABS:
Standard Anti-lock Braking System (ABS)
Traction Control:
Available Traction Control System (TCS) on some trims.
Airbags:
Frontal airbags, optional side-impact airbags.
Seatbelts:
Pretensioner front seatbelts.
Oil Change Interval:
Every 3,750 miles or 3 months (under severe conditions) or 7,500 miles or 7.5 months (under normal conditions) - refer to manual for specifics.
Timing Belt Replacement:
Every 105,000 miles or 105 months for 2.5L SOHC engines.
Transmission Fluid Change Interval:
Every 30,000 - 60,000 miles, depending on driving conditions (refer to manual).
Engine Oil Type:
5W-30 Synthetic (or 10W-30 if ambient temps are consistently above 0°F, consult manual for full range)
Engine Oil Capacity:
4.5 US quarts (4.3 liters) with filter for 2.5L; 5.5 US quarts (5.2 liters) for 3.0L.
Coolant Type:
Subaru Genuine Coolant (or equivalent P-HOAT, typically blue or green)
Coolant Capacity:
Approx. 7.0 US quarts (6.6 liters)
Head Gaskets:
While less common than in earlier generations, head gasket leaks can still occur, especially on higher mileage vehicles. The manual details inspection and replacement procedures.
Cv Boots:
Cracked or torn CV boots can lead to premature CV joint failure. The manual provides replacement instructions for CV boots and axles.
Suspension Components:
Wear on control arm bushings, ball joints, and tie rod ends is common with age and mileage. The manual covers inspection and replacement.
