🏷️ Basic Information

Make:

Subaru

Model:

Legacy

Model Years Covered:

2004, 2005

Chassis Codes:

BP (Wagon), BL (Sedan)

👋 Introduction

Segment:

Mid-size sedan and wagon, competing with vehicles like the Toyota Camry, Honda Accord, Mazda6

Differentiation:

Standard Symmetrical All-Wheel Drive, boxer engine layout, reputation for reliability and safety

Strengths:

AWD capability in challenging weather, comfortable ride, spacious interior for its class

Engine Layout:

Horizontally opposed (Boxer) engines

Drivetrain Layout:

Standard Symmetrical All-Wheel Drive (AWD) on most models

Body Styles:

Sedan (BL) and Sport Wagon (BP)

📋 Manual Details

Vehicle Generations:

Fifth Generation (BP/BL)

Market Regions:

North America (implied by product description context)

Estimated Page Count:

1500+

Type:

Workshop Service Repair Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Powertrain:

Engine mechanical, fuel system, ignition system, cooling system, exhaust system, lubrication system, engine control system (ECU/ECM)

Drivetrain:

Transmission (manual & automatic), clutch, drive shafts, differentials, axles, AWD system (Symmetrical All-Wheel Drive)

Chassis:

Suspension (front & rear), steering system, braking system (ABS, EBD), wheels and tires

Electrical:

Starting & charging system, lighting, instruments & gauges, wipers & washers, HVAC controls, power accessories (windows, locks, mirrors), audio system, SRS (airbag) system, body control module (BCM)

Body:

Exterior body panels, interior trim, doors, hood, trunk, windows, seals, structural components

Maintenance:

Scheduled maintenance, oil changes, filter replacements, fluid checks and top-offs, belt inspections and replacements

Diagnostics:

Troubleshooting guides, symptom-based diagnostics, DTC (Diagnostic Trouble Code) interpretation, wiring diagrams

Repair:

Component removal and installation, sub-assembly repair, seal and gasket replacement, part specification and torque values

Special Procedures:

Engine timing belt replacement, clutch replacement, brake bleeding, suspension alignment, airbag system servicing

Diagnostic Capability:

Advanced diagnostic procedures, including specific testing methods for sensors and actuators

Rebuild Information:

Detailed procedures for engine and transmission overhauls, including component specifications and tolerances

Wiring Diagrams:

Comprehensive electrical wiring diagrams for all vehicle systems, color-coded and clearly labeled

📊 Manual Specifications

Searchability:

Fully searchable text for quick information retrieval

Navigation:

Hyperlinked table of contents and index for easy navigation

Resolution:

High-resolution, suitable for clear printing of all diagrams and text

Type:

N/A (Digital Format)

Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Code 2 5I:

EJ253

Engine Displacement 2 5I:

2.5 Liters (2457 cc)

Engine Cylinders 2 5I:

4

Engine Configuration 2 5I:

Naturally Aspirated, Boxer

Horsepower 2 5I:

168 hp @ 5600 rpm

Torque 2 5I:

166 lb-ft @ 4000 rpm

Engine Code Gt:

EJ255

Engine Displacement Gt:

2.5 Liters (2457 cc)

Engine Configuration Gt:

Turbocharged, Boxer

Horsepower Gt:

250 hp @ 6000 rpm

Torque Gt:

250 lb-ft @ 3600 rpm

Fuel Type:

Unleaded gasoline

Induction:

Electronic Port Fuel Injection (MPI)

Turbocharger Gt:

IHI VF38 (or similar)

🔧 Transmission

Type 2 5I:

5-speed Manual Transmission

Type Gt:

6-speed Manual Transmission

Type 2 5I:

4-speed Automatic Transmission (with Sportshift)

Type Gt:

5-speed Automatic Transmission (with Sportshift)

AWD System Type:

Symmetrical All-Wheel Drive (with viscous coupling center differential for manual, electronic control for automatic)

Clutch Type:

Hydraulically operated, single dry plate

📐 Dimensions

Wheelbase Sedan:

104.0 inches (2642 mm)

Wheelbase Wagon:

104.3 inches (2649 mm)

Length Sedan:

189.2 inches (4806 mm)

Length Wagon:

189.0 inches (4800 mm)

Width:

69.1 inches (1755 mm)

Height Sedan:

56.7 inches (1440 mm)

Height Wagon:

57.1 inches (1450 mm)

Passenger Volume:

Approx. 96.0 cu ft (Sedan), 98.0 cu ft (Wagon)

Cargo Volume Sedan:

Approx. 14.7 cu ft

Cargo Volume Wagon:

Approx. 31.7 cu ft (behind rear seats), 67.0 cu ft (with rear seats folded)

Curb Weight 2 5I Sedan Manual:

3270 lbs (1483 kg)

Curb Weight Gt Sedan Manual:

3445 lbs (1563 kg)

Wheel Bolt Pattern:

5 x 100 mm

Tire Size 2 5I Standard:

205/55R16

Tire Size Gt Standard:

215/45R17

🛡️ Safety Features

NHTSA Frontal Driver 2004:

5 Stars

NHTSA Frontal Passenger 2004:

5 Stars

IIHS Frontal Offset 2004:

Good

ABS:

Standard (Anti-lock Braking System)

Ebd:

Standard (Electronic Brake-force Distribution)

Traction Control:

Available (TCS) on some models

Stability Control:

Available (VDC - Vehicle Dynamics Control) on some models

Airbags:

Frontal airbags, front side-impact airbags (standard on many trims), available side curtain airbags

Seatbelts:

3-point seatbelts with pretensioners and load limiters, LATCH system for child seats

💡 Technology Features

Audio System:

Standard AM/FM/CD player, optional premium audio systems with subwoofer, available navigation system on higher trims/optional.

Cruise Control:

Standard electronic cruise control

Keyless Entry:

Available keyless entry and remote start systems

Auxiliary Input:

Not standard; some later models or aftermarket units may feature auxiliary audio input or USB ports.

🔧 Maintenance

Oil Change Interval:

Every 3,750 miles or 6 months (severe service) / 7,500 miles or 12 months (normal service), consult manual for exact details.

Engine Oil Type:

5W-30 (SAE viscosity grade), API certified, SYNTHETIC RECOMMENDED

Engine Oil Capacity 2 5I:

4.8 US quarts (4.5 liters) with filter change

Engine Oil Capacity Gt:

4.8 US quarts (4.5 liters) with filter change

Engine Oil Filter Part Number Example:

Subaru 15208AA031 (verify with VIN)

Transmission Fluid Type Manual:

GL-5 Gear Oil, SAE 75W-90 (refer to manual for specific Subaru specs)

Transmission Fluid Type Automatic:

Subaru ATF-HP (High Performance) Automatic Transmission Fluid (verify with VIN)

Coolant Type:

Subaru Super Coolant (Blue) or equivalent ethylene glycol-based coolant with Subaru additive

Coolant Capacity:

Approx. 7.6 US quarts (7.2 liters)

Timing Belt Replacement Interval:

Every 105,000 miles or 105 months (critical for interference engine)

Head Gaskets:

While less prevalent than earlier generations, some reports of external oil leaks from head gaskets exist, particularly on higher mileage vehicles. Internal coolant leaks are less common in this generation but still a possibility.

Turbocharger Gt:

Early turbo failures on GT models could occur due to oil starvation or neglect; proper maintenance is crucial.

Catalytic Converter:

Premature failure of the catalytic converter on some models, often due to misfires or rich fuel conditions.

Suspension Components:

Wear and tear on control arm bushings, sway bar links, and struts are common with age and mileage.

Automatic Transmission Behavior:

Some owners report slightly harsh shifts or occasional hesitations, which may be addressed by fluid changes and adaptive relearning procedures.

📚 Vehicle History

Subaru Heritage:

Subaru (part of Fuji Heavy Industries) has a history of producing innovative vehicles, known for their boxer engines and Symmetrical All-Wheel Drive systems since the 1970s.

Legacy Introduction:

The Subaru Legacy was introduced in 1989 as a replacement for the Subaru Leone.

Bp Bl Generation:

The 2004-2005 models represent the fifth generation of the Subaru Legacy, codenamed BP for the wagon and BL for the sedan.

Key Changes Fifth Gen:

This generation saw a significant redesign with a more refined exterior and interior, improved chassis dynamics, and the introduction of the more powerful GT models.

Manufacturing Location:

Gunma Plant, Japan

🏆 Awards & Recognition

IIHS Top Safety Pick:

The 2004 Subaru Legacy models generally performed well in IIHS tests, earning 'Good' ratings for frontal offset impacts.

Consumer Reports Ratings:

Consumer Reports typically rated the Legacy favorably for its AWD system, ride comfort, and handling, though some model years had average or below-average predicted reliability for certain components.

Emission Standards:

Meets EPA and CARB emission standards for its model years.