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2003 Audi A4 CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Audi 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 Audi A4 car and truck
repair procedures including Audi 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 Audi A4 automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 2003 Audi A4 AUTOMOBILES
Audi -> Automatic Temperature Control System Diagnosis & Testing -> Basic Setting
Vehicle: 2003 Audi A4 1.8 L4 GAS
- Access diagnostic system as outlined under "Accessing Diagnostic Trouble Codes."
- Press scan tool buttons "0" and "4" to select "Basic Setting."
- Press "Q" button to enter input. Four to six 3-digit numbers should be displayed on screen depending on system. ...
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BRAKE SERVICE PROCEDURES FOR 2003 Audi A4 AUTOMOBILES
Anti-lock Brakes -> Component Replacement -> A4 & S4 -> A4, A6, S4 & S6 -> A6 & S6 -> A8 & S8 -> Electronic Control Unit -> Front Wheel Speed Sensors -> Hydraulic Control Unit -> Hydraulic Control Unit Mounting Bracket -> Rear Wheel Speed Sensors -> TT
Vehicle: 2003 Audi A4 Cabriolet 3.0 V6 GAS
Electronic Control Unit
A4, A6, S4 & S6
The electronic control unit is located beneath the lefthand side of the rear seat.
- Turn ignition Off.
- Remove rear seat.
- Remove spring retaining electrical connector, then disconnect electrical connector.
- Remove screws securing control unit.
- Reverse procedure to install.
A8 & S8
- Remove lower slot cover from between knee bolster and lower column cover.
- Remove knee bolster.
- Remove ABS control module.
- Disconnect ABS control module electrical harness connector.
- Reverse procedure to install.
TT
The control module is mounted to the hydraulic unit, located...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Audi A4 AUTOMOBILES
Audi -> Fuel Filter Scheduled Maintenance -> All 1989-05 -> Normal Service -> Severe Service
Vehicle: 2003 Audi A4 Cabriolet 3.0 V6 GAS
Normal Service
Service as re...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Audi A4 AUTOMOBILES
CV AXLE SHAFT, Replace
Vehicle: 2003 Audi A4 Cabriolet 3.0 V6 GAS
- Remove wheel cover, then drive axle bolt in hub.
- Raise and support vehicle, then remove tires.
- Remove drive axle mounting bolts.
- Remove cable for ABS wheel speed sensor from bracket at brake caliper, then pull ABS wheel speed sensor slightly out of swing arm.
- Remove swing ar...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Audi A4 AUTOMOBILES
Alternator, Replace
Vehicle: 2003 Audi A4 1.8 L4 GAS
- Obtain radio anti-theft protection code.
- Loosen ribbed belt and remove from alternator.
- Remove air guide at throttle body.
- Remove upper and lower attaching nut and bolt.
- Move alternator slightly, th...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2003 Audi A4 AUTOMOBILES
Cabin Air Filter Service -> Audi -> 1996-2008 A4, 1998 Cabriolet, 2002-08 S4 & 2007-09 RS4
Vehicle: 2003 Audi A4 1.8 L4 GAS
On 1996-2003 models, the cabin air filter should be replaced every 20,000 miles.
On 2004-09 models, the cabin air filter should be replaced at 15,000 miles, then every 20,000 miles.
- Open the hood.
- Remove the righthand side air intake pl...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Audi A4 AUTOMOBILES
Audi -> Auto-Check Indicator System ->
Vehicle: 2003 Audi A4 Cabriolet 1.8 L4 GAS
The auto-check system will monitor certain vehicle systems when the ignition switch is placed in the On position and vehicle is operated. When all monitored systems are functioning properly, the system display will indicate "OK" for a few seconds after the ignition switch is placed in the On position.
This system monitors brake fluid level and hydraulic pressure, engine oil pressure, coolant temperature and level, brake pad wear, headlamps and tail lamps, battery voltage, washer fluid level and fuel level.
When the auto-check yellow or r...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Audi A4 AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 2003 Audi A4 Cabriolet 3.0 V6 GAS
Inlet
- Drain coolant into a suitable container.
- Reposition hose clamp at heater core and remove hose.
- Reposition hose clamp at rear coolant pipe and remove hose.
- Remove hose from vehicle.
- Reverse procedure t...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Audi A4 AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Audi A4 Cabriolet 3.0 V6 GAS
- Remove left and right engine covers.
- Remove air guide mounting bolts.
- Detach Evaporative Emission (EVAP) canister purge regulator valve at air guide.
- Remove air guide.
- Remove front engine cover.
- Mar...
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COMPONENT LOCATION DIAGRAMS FOR 2003 Audi A4 AUTOMOBILES
Component location diagrams for most 2003 Audi A4 cars and light trucks sold in the U.S. from 1990+.
 Engine Compartment Diagram for 2003 Audi A4 1.8 L4 GASComponents on diagram: |
 Rear Body Components Diagram for 2003 Audi A4 Cabriolet 3.0 V6 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2003 Audi A4 AUTOMOBILES
OEM drawn wiring diagrams for most 2003 Audi A4 cars and light trucks sold in the U.S.
 2003 Audi A4 Cabriolet 3.0 V6 GAS Wiring DiagramComponents on diagram: |
 2003 Audi A4 3.0 V6 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Audi A4 AUTOMOBILES
OEM TSB listings for most 2003 Audi A4 cars and light trucks sold in the U.S. from 1985+.
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Document: AIRBAG, REPLACEMENT INTERVAL CHANGE - REVISED Vehicle: 2003 Audi A4 1.8 L4 GAS Auto Systems: |
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Document: LATCH SYSTEM, INSTALLING/RETROFITTING - REVISED Vehicle: 2003 Audi A4 1.8 L4 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Audi A4 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Audi A4 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 Audi A4 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 Audi A4 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 Audi A4 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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