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2003 Subaru Impreza 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
- Technical Service Bulletins
- Specifications
- 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 2003 Subaru Impreza 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 Impreza automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 2003 Subaru Impreza AUTOMOBILES
Subaru -> Manual Air Conditioning & Heater Diagnosis & Testing -> General Troubleshooting
Vehicle: 2003 Subaru Impreza RS 2.5 H4 GAS
Refer to Fig. , ...
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BRAKE SERVICE PROCEDURES FOR 2003 Subaru Impreza AUTOMOBILES
Subaru -> Power Brake Units -> Description
Vehicle: 2003 Subaru Impreza Outback 2.5 H4 GAS
The brake booster is located inline between the master cylinder and the brake pedal. It serves to mechanically boost the force pushing the pistons of the master cylinder.
The brake booster consists of a power cylinder section and a power piston section. The power cylinder is made up of a front shell, rear shell and a diaphragm. The front and rear shells are connected with the diaphragm placed in between the two. The power cylinder chamber is closed to the atmosphere and the left and right chambers of the diaphragm are kept sealed.
The power piston is ...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Subaru Impreza AUTOMOBILES
Subaru -> Component Locations -> 1990-03 Legacy, 1993-04 Impreza (Except WRX STi), 1998-04 Forester & 2000-03 Outback w/1.8L, 2.2L, 2.5L & 3.0L Engines
Vehicle: 2003 Subaru Impreza RS 2.5 H4 GAS
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Subaru Impreza AUTOMOBILES
DRIVESHAFT, Replace
Vehicle: 2003 Subaru Impreza Outback 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 rear exhaust pipe and muffler.
- Remove front exhaust cover.
- Remove differential mount front cover bolts, then remove mount.
- Place reference mark on front driveline and rear differential flange. Paint is recommended for match marks. Never damage rear driveline shaft flange yoke or ...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Subaru Impreza AUTOMOBILES
Alternator, Replace
Vehicle: 2003 Subaru Impreza Outback 2.5 H4 GAS
- Disconnect ground cable from battery.
- Disconnect connector and terminal from alternator.
- Remove V-belt cover.
- Remove front side V-belt.
- Remove bolts w...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2003 Subaru Impreza AUTOMOBILES
Cabin Air Filter Service -> Subaru -> 1998-2002 Forester & 1999-2003 Impreza
Vehicle: 2003 Subaru Impreza Outback 2.5 H4 GAS
The cabin air filter should be replaced every 12 months or 7,500 miles.
- From under passenger's side of the instrument panel, remove two cabin air filter access cover to evaporator case retai...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Subaru Impreza AUTOMOBILES
Subaru -> Rear Differential Oil Temperature Indicator Lamp ->
Vehicle: 2003 Subaru Impreza Outback 2.5 H4 GAS
The Rear Differential Oil temperature lamp will turn on when ignition switch is placed in On position and should turn off after a few seconds. If lamp illuminates while driving, the vehicle should be pulled off the r...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Subaru Impreza AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 2003 Subaru Impreza Outback 2.5 H4 GAS
Lower
- Disconnect battery ground cable.
- Drain cooling system into a suitable container by loosening drain plug of radiator.
- Reposition hose clamp at radiator outlet.
- Remove hose from radiator.
- Reposition hose clamp at thermostat housing.
- Remove hose from thermostat housing.
- Remove hose from vehicle.
- Reverse proc...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Subaru Impreza AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Subaru Impreza WRX 2.0 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 2003 Subaru Impreza AUTOMOBILES
Component location diagrams for most 2003 Subaru Impreza cars and light trucks sold in the U.S. from 1990+.
 Electrical Components Location Diagram for 2003 Subaru Impreza WRX 2.0 H4 GASComponents on diagram: |
 Automatic Transmission Components Diagram for 2003 Subaru Impreza RS 2.5 H4 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2003 Subaru Impreza AUTOMOBILES
OEM drawn wiring diagrams for most 2003 Subaru Impreza cars and light trucks sold in the U.S.
 2003 Subaru Impreza WRX 2.0 H4 GAS Wiring DiagramComponents on diagram: |
 2003 Subaru Impreza Outback 2.5 H4 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Subaru Impreza AUTOMOBILES
OEM TSB listings for most 2003 Subaru Impreza cars and light trucks sold in the U.S. from 1985+.
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Document: EVAPORATIVE EMISSION SYSTEM DIAGNOSTIC
INFORMATION Vehicle: 2003 Subaru Impreza Outback 2.5 H4 GAS Auto Systems: |
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Document: Turbocharger Mesh Filter Screen Vehicle: 2003 Subaru Impreza WRX 2.0 H4 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Subaru Impreza AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Subaru Impreza 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 2003 Subaru Impreza 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 2003 Subaru Impreza 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 2003 Subaru Impreza 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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