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2004 Subaru Legacy CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Subaru REPAIR SHOPS DON'T WANT YOU TO KNOW
Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!Select Section
- Component Locations
- Wiring Diagrams
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- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Cabin Air Filter Locations & Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2004 Subaru Legacy car and truck
repair procedures including Subaru engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your Subaru Legacy automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 2004 Subaru Legacy AUTOMOBILES
Electrical Symbol & Wire Color Code Identification -> Wire Color Code Identification -> Imported Vehicles
Vehicle: 2004 Subaru Legacy 2.5 H4 GAS
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BRAKE SERVICE PROCEDURES FOR 2004 Subaru Legacy AUTOMOBILES
Subaru -> Hydraulic Brake Systems -> Component Replacement -> Dual Proportioning Valve -> Master Cylinder
Vehicle: 2004 Subaru Legacy 2.5 H4 GAS
Master Cylinder
- Disconnect brake lines from master cylinder and plug the ends.
- If applicable, disconnect fluid warning switch electrical connector.
- Remove master cylinder retaining nuts and the master cylinder.
- Reverse procedure to install.
- Bleed hydraulic system after completing installation.
Dual Proportioning Valve
Inspect brake line connections at DPV...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2004 Subaru Legacy AUTOMOBILES
Subaru -> Component Locations -> B9 Tribeca, 2004-06 Impreza WRX STi, Legacy & Outback & 2005-06 Forester & Impreza
Vehicle: 2004 Subaru Legacy 2.5 H4 GAS
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2004 Subaru Legacy AUTOMOBILES
DRIVESHAFT, Replace
Vehicle: 2004 Subaru Legacy 2.5 H4 GAS
Wrap metal parts with a cloth or rubber material. Rubber boot may be damaged due to interference with adjacent metal parts during removal.
- Disconnect battery ground cable.
- Place vehicle in neutral.
- Release parking brake.
- Raise and support vehicle and support it with safety stands in proper locations.
- Remove center exhaust pipes bolts and nuts.
- Remove rear exhaust pipe and muffler.
- Remove heat shield cover.
- Place reference mark on front driveline and rear differential flange. Paint is recommended for match marks. Never damage rear driveline shaft flange yoke or companion flange
- Remove...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2004 Subaru Legacy AUTOMOBILES
Alternator, Replace
Vehicle: 2004 Subaru Legacy 2.5 H4 GAS
- Disconnect ground cable from battery.
- Disconnect connector and terminal from alternator.
- Remove V-belt covers.
- Remove V-belts.
- Remove bolts which ...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2004 Subaru Legacy AUTOMOBILES
Cabin Air Filter Service -> Subaru -> 1998-2004 Legacy, Outback & 2003-04 Baja
Vehicle: 2004 Subaru Legacy 2.5 H4 GAS
The cabin air filter should be replaced every 12 months or 9,300 ...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2004 Subaru Legacy AUTOMOBILES
Subaru -> Anti-Lock Brake System (ABS)/Traction Control System (TCS) Indicator -> 2000-04 Legacy & Outback
Vehicle: 2004 Subaru Legacy 2.5 H4 GAS
The Anti-Lock Brake System (ABS) indicator lamp should illuminate for a few as a bulb check when the ignition Switch is placed in the On position. If the lamp remains illuminated or comes on while driving the vehicle or is blinking, a fault in the ABS has been detected. After diagnosis and repair are completed, the DTCs can be cleared as follows:
- Take diagnostic connector out f...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2004 Subaru Legacy AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 2004 Subaru Legacy 2.5 H4 GAS
Inlet
- Disconnect battery ground cable.
- Drain cooling system into a suitable container by loosening drain plug of radiator.
- Reposition hose clamp at heater core.
- Remove hose from heater core.
- Reposition hose clamp at cylinder head.
- Remove hose from cylinder head.
- Remove hose from vehicle.
- Reverse procedur...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2004 Subaru Legacy AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2004 Subaru Legacy 2.5 H4 GAS
- Remove drive belt cover. Wipe off any oil or water on belt and pulley.
- Loosen lockbolt on slider bolt.
- Loosen slider bolt.
- ...
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COMPONENT LOCATION DIAGRAMS FOR 2004 Subaru Legacy AUTOMOBILES
Component location diagrams for most 2004 Subaru Legacy cars and light trucks sold in the U.S. from 1990+.
 Solenoids Diagram for 2004 Subaru Legacy 2.5 H4 GASComponents on diagram: |
 Control Modules Diagram for 2004 Subaru Legacy 2.5 H4 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2004 Subaru Legacy AUTOMOBILES
OEM drawn wiring diagrams for most 2004 Subaru Legacy cars and light trucks sold in the U.S.
 2004 Subaru Legacy 2.5 H4 GAS Wiring DiagramComponents on diagram: |
 2004 Subaru Legacy 2.5 H4 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2004 Subaru Legacy AUTOMOBILES
OEM TSB listings for most 2004 Subaru Legacy cars and light trucks sold in the U.S. from 1985+.
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Document: Service Manual Corrections Vehicle: 2004 Subaru Legacy 2.5 H4 GAS Auto Systems: |
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Document: EVAPORATIVE EMISSION SYSTEM DIAGNOSTIC
INFORMATION Vehicle: 2004 Subaru Legacy 2.5 H4 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2004 Subaru Legacy AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2004 Subaru Legacy cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 2004 Subaru Legacy cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 2004 Subaru Legacy cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 2004 Subaru Legacy cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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