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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
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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 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 RS 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 -> Fuel Filter Scheduled Maintenance -> 1994-04 Except 2004 Impreza WRX STi -> Normal Service -> Severe Service
Vehicle: 2003 Subaru Impreza Outback 2.5 H4 GAS
Normal Service
Replace ...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Subaru Impreza AUTOMOBILES
CV AXLE SHAFT, Replace -> Front -> Rear
Vehicle: 2003 Subaru Impreza RS 2.5 H4 GAS
Front
- Disconnect battery ground cable.
- Raise and support vehicle and support it with safety stands in proper locations.
- Remove wheel nuts and front wheels.
- Unstake hub nut using suitable tool.
- Remove wheel hub locknut using suitable tool. Loosen and retighten axle nut after removing wheel from vehicle. Failure to follow this instruction may damage wheel bearings.
- Disconnect transverse link from housing.
- Remove spring pin which secures transmission spindle and install a new spring pin upon installation.
- Remove front driveshaft assembly. If driveshaft is hard to remove use suitable...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Subaru Impreza AUTOMOBILES
Starter, Replace
Vehicle: 2003 Subaru Impreza Outback 2.5 H4 GAS
- Disconnect battery ground cable.
- Disconnect solenoid wiring at starter.
- Remo...
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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 WRX 2.0 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 -> Malfunction Indicator Lamp (MIL) ->
Vehicle: 2003 Subaru Impreza TS 2.5 H4 GAS
The MIL will be illuminated when the ignition switch is placed in the On position, and should go out when the engine is started. If the MIL remains lit after engine start-up, the self-diagnostic system has detected a fault an...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Subaru Impreza AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 2003 Subaru Impreza WRX 2.0 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 2003 Subaru Impreza AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Subaru Impreza TS 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 2003 Subaru Impreza AUTOMOBILES
Component location diagrams for most 2003 Subaru Impreza cars and light trucks sold in the U.S. from 1990+.
 Control System Components Diagram for 2003 Subaru Impreza Outback 2.5 H4 GASComponents on diagram: |
 Automatic Transmission Diagram for 2003 Subaru Impreza WRX 2.0 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 TS 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: |
|
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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