🏷️ Basic Information

Make:

Subaru

Model:

Legacy

Model Years:

2004, 2005

Product Type:

Workshop Service Manual (WSM) / Repair Manual

Chassis Codes:

BP (Wagon), BL (Sedan)

👋 Introduction

Segment:

Mid-size Sedan/Wagon, known for All-Wheel Drive and Boxer Engines

Competitors:

Toyota Camry, Honda Accord, Nissan Altima, Mazda6

Platform:

Subaru's third generation platform for Legacy (BP/BL)

Powertrain Emphasis:

Symmetrical AWD standard across most trims, Boxer engine layout

Owner Benefit:

Enables DIY maintenance and repair, significantly reducing dealership service costs.

📋 Manual Details

Scope:

Comprehensive Service and Repair Information

Estimated Pages:

1500+

Type:

Factory Authorized Workshop Service Manual

Language:

English

Format:

Digital Download (PDF)

📖 Manual Coverage

Engine:

2.5L Naturally Aspirated EJ253, 2.5L Turbocharged EJ255 (GT/GT spec.B), 3.0L Naturally Aspirated EZ30D (3.0R)

Transmission:

5-Speed Manual (TY757), 4-Speed Automatic (43072 / 4EAT)

Drivetrain:

Symmetrical All-Wheel Drive (AWD) System, Differentials (Front, Center, Rear)

Suspension:

Front MacPherson Struts, Rear Multi-Link Independent Suspension, AWD Components

Brakes:

Front Ventilated Disc, Rear Solid Disc (Standard), Front Ventilated Disc, Rear Ventilated Disc (GT/3.0R), ABS System, Brake Control Module

Steering:

Power Assisted Rack and Pinion

Electrical:

Wiring Diagrams, Fuses, Relays, Lighting, Power Windows, Mirrors, Locks, Audio System, HVAC Controls, ECM/BCM Diagnosis

Body:

Body Panels, Doors, Hood, Trunk, Bumpers, Glass, Interior Trim, Seats, Upholstery

HVAC:

Air Conditioning System, Heater Core, Blower Motor, Climate Controls, Refrigerant Handling

Safety Systems:

Airbag System, Seatbelt Pre-tensioners, SRS Module Diagnosis

Maintenance:

Scheduled Maintenance, Oil Changes, Filter Replacements, Fluid Checks and Replenishments, Spark Plug Replacement, Belt Inspection/Replacement

Diagnostics:

Troubleshooting Guides, Diagnostic Trouble Codes (DTCs), On-Board Diagnostics (OBD-II), Wiring Harness Testing

Repair Overhaul:

Engine Reassembly, Transmission Overhaul, Brake Component Replacement, Suspension Component Rebuilding, AC System Repair

Installation:

Component Installation and Removal (Engine, Transmission, Suspension, Brakes, Body Panels, Interior Components)

Specifications:

Torque Specifications, Clearances, Alignment Data, Fluid Capacities, Electrical Specifications

Depth:

Factory Level Detail, Suitable for Professional Technicians and Advanced DIYers

Diagnostic Tools:

Information on Subaru Select Monitor (SSM) and general OBD-II scan tools

Troubleshooting Methodology:

Systematic approach to diagnosing faults with flowcharts and symptom-based guides

📊 Manual Specifications

File Type:

Portable Document Format (PDF)

Searchability:

Fully searchable text content

Resolution:

High-resolution, suitable for printing

Binding:

N/A (Digital Download)

Paper:

N/A (Digital Download)

Included Documents:

Wiring Diagrams, Technical Service Bulletins (TSBs) often incorporated

⚙️ Engine Specifications

Engine Code Na:

EJ253

Engine Displacement Na:

2.5 Liters (2457 cc)

Engine Configuration Na:

Naturally Aspirated, Boxer-4 (Horizontally Opposed)

Performance Na:

Approx. 173 hp @ 5600 rpm, 166 lb-ft @ 3700 rpm (Varies slightly by year/spec)

Fuel System Na:

Multi-Point Fuel Injection (MPI)

Engine Code Turbo:

EJ255

Engine Displacement Turbo:

2.5 Liters (2457 cc)

Engine Configuration Turbo:

Turbocharged, Boxer-4 (Horizontally Opposed)

Performance Turbo:

Approx. 210 hp @ 5600 rpm, 235 lb-ft @ 3600 rpm (GT), 250 hp / 250 lb-ft (GT spec.B)

Fuel System Turbo:

Multi-Point Fuel Injection (MPI) with Turbocharger

Engine Code V6:

EZ30D

Engine Displacement V6:

3.0 Liters (2999 cc)

Engine Configuration V6:

Naturally Aspirated, Boxer-6 (Horizontally Opposed)

Performance V6:

Approx. 243 hp @ 6600 rpm, 219 lb-ft @ 4200 rpm

Fuel System V6:

Multi-Point Fuel Injection (MPI)

Timing Drive:

Timing Belt (EJ engines), Timing Chain (EZ30D)

Coolant Capacity:

Approx. 7.0-7.5 Liters (Check specific engine variant)

Oil Capacity:

Approx. 4.5-5.5 Liters (Check specific engine variant)

Recommended Oil Type:

SAE 5W-30 Synthetic (Check Owner's Manual for exact specification, API SN or higher recommended)

🔧 Transmission

Type:

5-Speed Manual (TY757 Series)

Type:

4-Speed Automatic (4EAT - 43072 Series)

AWD System:

Viscous coupling center differential (Manual), Electronically controlled multi-plate transfer clutch (Automatic)

Gear Ratios Manual:

Refer to manual for specific ratios per gear

Transmission Fluid Type Auto:

Subaru ATF-HP (Genuine Subaru or equivalent DEXRON-III/MERCON compatible)

Transmission Fluid Capacity Auto:

Approx. 3.7 Liters (Drain and Fill)

Transmission Fluid Type Manual:

Subaru Manual Transmission Fluid (Genuine Subaru or equivalent GL-5 75W-90)

Transmission Fluid Capacity Manual:

Approx. 2.5 Liters

📐 Dimensions

Length Sedan:

Approx. 4745 mm (186.8 in)

Width Sedan:

Approx. 1730 mm (68.1 in)

Height Sedan:

Approx. 1425 mm (56.1 in)

Wheelbase Sedan:

Approx. 2700 mm (106.3 in)

Length Wagon:

Approx. 4755 mm (187.2 in)

Width Wagon:

Approx. 1730 mm (68.1 in)

Height Wagon:

Approx. 1490 mm (58.7 in)

Wheelbase Wagon:

Approx. 2700 mm (106.3 in)

Curb Weight Sedan Na:

Approx. 1450-1550 kg (3200-3420 lbs)

Curb Weight Sedan Gt:

Approx. 1530-1630 kg (3370-3590 lbs)

Curb Weight Wagon Na:

Approx. 1470-1570 kg (3240-3460 lbs)

Curb Weight Wagon Gt:

Approx. 1550-1650 kg (3420-3640 lbs)

Wheel Bolt Pattern:

5x100mm

Tire Size Base:

205/55R16

Tire Size Gt:

215/45R17 or 215/45R18

🛡️ Safety Features

NHTSA Front Impact Driver:

Good (2004 models)

NHTSA Front Impact Passenger:

Good (2004 models)

NHTSA Side Impact Front Seat:

Good (2004 models)

NHTSA Side Impact Rear Seat:

Good (2004 models)

IIHS Front Offset Score:

Good (2005 models)

IIHS Side Impact Score:

Good (2005 models)

Traction Control:

Standard on most trims

Stability Control:

Subaru Vehicle Dynamics Control (VDC) available on higher trims

ABS:

Standard 4-wheel Anti-lock Braking System

Airbags:

Front Dual-Stage Airbags, Front Side-Impact Airbags, Side Curtain Airbags (available/standard on some trims)

Seatbelts:

Front 3-point Pretensioner Seatbelts, Rear 3-point Seatbelts

💡 Technology Features

Head Unit:

Factory AM/FM/CD Player, optional CD changer, available Satellite Radio preparation.

Display:

Basic LCD display for radio and clock functions.

Cruise Control:

Standard on most trims.

Keyless Entry:

Available on most trims.

Auxiliary Input:

Not standard; aftermarket solutions typically required.

🔧 Maintenance

Oil Change Interval:

Every 3,750 miles (severe) or 7,500 miles (normal) for synthetic oil. Consult manual for specifics.

Air Filter Replacement:

Every 15,000 miles or as needed based on inspection.

Cabin Air Filter:

Every 15,000 miles or annually.

Spark Plug Replacement Ej253:

105,000 miles (Iridium Plugs)

Spark Plug Replacement Ej255:

105,000 miles (Iridium Plugs)

Spark Plug Replacement Ez30D:

105,000 miles (Iridium Plugs)

Timing Belt Replacement:

Not applicable (EJ engines use timing chains, EZ30D uses timing chain). Verify based on specific engine. Some older Subaru models used belts, but this generation primarily uses chains.

Coolant:

Subaru Super Coolant (Blue) or equivalent P-OAT ethylene glycol based.

Brake Fluid:

DOT 3 or DOT 4.

Power Steering Fluid:

Subaru Genuine Power Steering Fluid or equivalent DEXRON-III/MERCON ATF.

Head Gaskets:

While less prevalent than earlier EJ engines, some reports of head gasket leaks can occur, especially on higher mileage naturally aspirated models. Turbocharged models are generally more robust.

Catalytic Converter:

Premature failure on some models, often related to oil consumption or misfires. Covered under extended warranty for certain years/VINs.

Automatic Transmission:

Some reports of delayed shifting or transmission issues, especially if maintenance intervals are not adhered to. Fluid changes are critical.

Suspension Components:

Wear on bushings and ball joints can occur over time, particularly in areas with rough road conditions.

Cvt Transmission:

Not applicable to this manual's model years; CVT transmissions were introduced in later Legacy generations.

📚 Vehicle History

Manufacturer Origin:

Japan

Core Philosophy:

Emphasis on All-Wheel Drive, Boxer engines, and safety.

Generation:

Fourth Generation Subaru Legacy (BP/BL)

Design Language:

Significant redesign from previous generation, more aerodynamic and contemporary styling.

Key Updates 2004 2005:

Introduction of the new generation, with updated styling, chassis, and powertrain options.

Manufacturing Plant:

Subaru of Indiana Automotive (SIA), Lafayette, Indiana, USA and Gunma Plant, Japan

Production Years Generation:

2003-2009

🏆 Awards & Recognition

IIHS Top Safety Pick:

Yes (for 2005 models, based on frontal and side impact tests)

Consumer Reports Reliability:

Generally rated average to above average for this period, with specific model year variations. Engine and transmission health are key.

Manual Quality:

Factory-level, professional-grade documentation