Auto Parts Search
1998 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
A/C & HEATER SERVICE PROCEDURES FOR 1998 Audi A4 AUTOMOBILES
Computer Relearn Procedures -> Audi -> 1995-97 -> 1998-2004 -> OBD -> OBD II
Vehicle: 1998 Audi A4 2.8 V6 GAS
OBD
Whenever the ECM is replaced, the new ECM will need to be " Coded." Use the following procedure to "Code" the ECM.
- Connect VAG 1551, or equivalent scan tool to the diagnostic connector.
- Operate scan tool until display shows "Select Function XX."
- Press scan buttons 0 and 7 to select "Code Control Module" function, then press "Q" button to confirm input.
- "Code Control Module" and " Enter Code Number" should appear on the display.
- Enter correct code number as follows:
- Code 0003: Vehicles with manual transmission.
- Code 0004: Vehi...
CLICK HERE TO GET FULL ACCESS TO 1998 Audi A4 A/C & HEATER SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1998 Audi A4 AUTOMOBILES
Anti-lock Brakes -> System Service -> A4 & S4 -> A4, A6, S4 & S6 -> A6 & S6 -> A6, Cabriolet & S6 -> A8 -> Brake System Bleed -> Cabriolet -> Component Replacement -> Electronic Control Unit -> Front Wheel Speed Sensors -> Hydraulic Control Unit -> Hydraulic Control Unit Mounting Bracket -> Rear Wheel Speed Sensors -> TT
Vehicle: 1998 Audi A4 1.8 L4 GAS
Brake System Bleed
Refer to "Hydraulic Brake System" for procedures.
Component Replacement
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
- 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...
CLICK HERE TO GET FULL ACCESS TO 1998 Audi A4 BRAKE SERVICE PROCEDURES
FUEL FILTER REPLACEMENT PROCEDURES FOR 1998 Audi A4 AUTOMOBILES
Audi -> Component Locations -> 1991-05 2.8L V6
Vehicle: 1998 Audi A4 2.8 V6 GAS
Refer to Fig...
CLICK HERE TO GET FULL ACCESS TO 1998 Audi A4 FUEL FILTER REPLACEMENT PROCEDURES
DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1998 Audi A4 AUTOMOBILES
DRIVESHAFT, Replace
Vehicle: 1998 Audi A4 Avant 2.8 V6 GAS
- Remove cap from wheel using a suitable removal tool then loosen lug nuts.
- Remove axle bolt and washer Fig. . Remove and install axle bolt only with tires on ground. Do not move vehicle without driveshaft or outer constant velocity joint installed.
- Raise and support vehicle, then remove wheel.
- Pull speed sensor out of axle housing slightly.
- Loosen but do not remove lower control arm bolts at subframe.
- Remove lower strut bolt from lower control arm.
- Remove bolts from driveshaft flange at transaxle.
- Remove lower mounting bolt for strut.
- Remove bolts retaining knuckle to upper control a...
CLICK HERE TO GET FULL ACCESS TO 1998 Audi A4 DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES
STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1998 Audi A4 AUTOMOBILES
Starter, Replace
Vehicle: 1998 Audi A4 Avant 2.8 V6 GAS
- Remove alternator assembly.
- Disconnect starter motor electrical connectors.
- Raise and support vehicle.
- On models equipped with automatic transaxle, proceed as follows:
- Remove righthand front wheel as required.
- Remove starter motor to transaxle housing attaching bolts.
- Re...
CLICK HERE TO GET FULL ACCESS TO 1998 Audi A4 STARTER & ALTERNATOR REPLACEMENT PROCEDURES
CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 1998 Audi A4 AUTOMOBILES
Cabin Air Filter Service -> Audi -> 1996-2008 A4, 1998 Cabriolet, 2002-08 S4 & 2007-09 RS4
Vehicle: 1998 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...
CLICK HERE TO GET FULL ACCESS TO 1998 Audi A4 CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES
MAINTENANCE LAMP RESET PROCEDURES FOR 1998 Audi A4 AUTOMOBILES
Audi -> Electronic Ignition Warning Lamp ->
Vehicle: 1998 Audi A4 1.8 L4 GAS
The electronic ignition system warning lamp will be illuminated when the ignition switch is placed in the On position. After the engine is started, the lamp should go off. If the lamp lights during engine operation, a knocking condition is indicated or a problem has arisen in the ignition sys...
CLICK HERE TO GET FULL ACCESS TO 1998 Audi A4 MAINTENANCE LAMP RESET PROCEDURES
RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1998 Audi A4 AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 1998 Audi A4 Avant 2.8 V6 GAS
Lower
- Drain coolant into a suitable container.
- Reposition hose clamp at radiator and remove hose.
- Reposition hose clamp at thermostat housing and remove hose.
- Remove hose from vehicle.
- Reverse procedure...
CLICK HERE TO GET FULL ACCESS TO 1998 Audi A4 RADIATOR & HOSE REPLACEMENT PROCEDURES
SERPENTINE BELT SERVICE PROCEDURES FOR 1998 Audi A4 AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1998 Audi A4 1.8 L4 GAS
- Put lock carrier into service position.
- Mark direction of engine rotation on belt.
- Slacken belt by turning tensioner in directi...
CLICK HERE TO GET FULL ACCESS TO 1998 Audi A4 SERPENTINE BELT SERVICE PROCEDURES
COMPONENT LOCATION DIAGRAMS FOR 1998 Audi A4 AUTOMOBILES
Component location diagrams for most 1998 Audi A4 cars and light trucks sold in the U.S. from 1990+.
I/P & Console Component Locations Diagram for 1998 Audi A4 2.8 V6 GAS Components on diagram: |
Fuel & Emissions Systems Engine Compartment Components Locations Diagram for 1998 Audi A4 1.8 L4 GAS Components on diagram: |
CLICK HERE TO GET FULL ACCESS TO 1998 Audi A4 PARTS/COMPONENTS LOCATION DIAGRAMS!
WIRING DIAGRAMS FOR 1998 Audi A4 AUTOMOBILES
OEM drawn wiring diagrams for most 1998 Audi A4 cars and light trucks sold in the U.S.
1998 Audi A4 Avant 2.8 V6 GAS Wiring Diagram Components on diagram: |
1998 Audi A4 Avant 2.8 V6 GAS Wiring Diagram Components on diagram: |
CLICK HERE TO GET FULL ACCESS TO 1998 Audi A4 WIRING DIAGRAMS!
TECHNICAL SERVICE BULLETINS FOR 1998 Audi A4 AUTOMOBILES
OEM TSB listings for most 1998 Audi A4 cars and light trucks sold in the U.S. from 1985+.
Document: LATCH SYSTEM, INSTALLING/RETROFITTING - REVISED Vehicle: 1998 Audi A4 1.8 L4 GAS Auto Systems: |
Document: AIRBAG / PYROTECHNIC SAFETY BELT DEPLOYMENT INQUIRIES - REVISED Vehicle: 1998 Audi A4 1.8 L4 GAS Auto Systems: |
CLICK HERE TO GET FULL ACCESS TO 1998 Audi A4 TECHNICAL SERVICE BULLETINS!
COMPONENT/PARTS SPECIFICATIONS FOR 1998 Audi A4 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1998 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 1998 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 1998 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 1998 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
CLICK HERE TO GET FULL ACCESS TO 1998 Audi A4 SPECIFICATIONS DATA!
Shop online for auto body parts, engines, wheels, lights...
More parts |
Get the Complete Technical Service Bulletins! |
Access diagrams and repair information such as wiring diagrams, diagnosis and repair charts, manufacturer service bulletins, and OEM Part numbers of your 1998 Audi A4 vehicle. |
Access the Complete guide! |