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2008 Audi S4 CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Audi REPAIR SHOPS DON'T WANT YOU TO KNOW
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- Component Locations
- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- Driveline, U-Joint & CV Axles Replacement
- Tire Pressure Monitoring System
- Starter & Alternator Replacement
- Cabin Air Filter Locations & Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2008 Audi S4 AUTOMOBILES
CV AXLE SHAFT, Replace -> Front -> Rear
Vehicle: 2008 Audi S4 Cabriolet 4.2 V8 GAS
Front
- Remove wheel trim. Pull trim cap off light-alloy wheels, using puller in vehicle tool kit.
- Loosen bolt for drive axle outer joint by a maximum of 90°. Vehicle must be standing on its wheels to avoid risk of accident.
- Raise and support vehicle.
- Remove wheel and tire assembly.
- Screw all 5 wheel bolts hand-tight.
- Remove hex bolt for drive axle outer joint.
- Unbolt drive axle from flange shaft on transmission. If not enough space is available for removing drive axle, proceed as follows:
- Remove nut and hex bolt and pull out both upper links upward.
- Swing wheel bearing housing out ...
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TIRE PRESSURE MONITORING SYSTEM PROCEDURES FOR 2008 Audi S4 AUTOMOBILES
Component Replacement -> Installation -> Metal Valve Body & Wheel Electronics -> Removal -> TPMS Control Module -> TPMS Rear Antenna
Vehicle: 2008 Audi S4 Cabriolet 4.2 V8 GAS
Metal Valve Body & Wheel Electronics
Removal
The nickel plated valve insert must be replaced every tire change. Release air from the tire by removing the nickel plated valve insert. The TPMS sensor can be reused, but a damaged sensor must be replaced.
- Loosen the wheel lug nuts.
- Raise and support the vehicle with jack stands.
- Remove the wheel and tire assembly.
- When dismounting the tire from the rim, note the following:
- When using pressure paddles, remove the side of the tire opposite the valve stem from the rim first. Do not use the paddles in area (a) , Fig. .
- Position the tire c...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2008 Audi S4 AUTOMOBILES
Alternator, Replace
Vehicle: 2008 Audi S4 4.2 V8 GAS
- Disconnect battery ground cable.
- Pivot tensioner to release drive belt tension.
- Place a bolt or drift in hole to lock tensioner.
- Remove drive belt.
- Remove drive belt tensioner.
- Disconnect connector from alternator.
- Remove nut and B+ terminal from alternator.
- Clamp off coolant hoses.
- Loosen hose clamps on coolant hoses.
- Loosen alternator mounting bolts approximately 6 turns.
- Tap bolt heads with ...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2008 Audi S4 AUTOMOBILES
Cabin Air Filter Service -> Audi -> 1996-2008 A4, 1998 Cabriolet, 2002-08 S4 & 2007-09 RS4
Vehicle: 2008 Audi S4 4.2 V8 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 2008 Audi S4 AUTOMOBILES
Audi -> Electronic Ignition Warning Lamp ->
Vehicle: 2008 Audi S4 4.2 V8 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...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2008 Audi S4 AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 2008 Audi S4 Avant 4.2 V8 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 ...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2008 Audi S4 AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2008 Audi S4 Avant 4.2 V8 GAS
- Mark direction of rotation of drive belt with chalk or felt pen, if belt is to be reused.
- Loosen tensioning bolt using a suitable tool and remove drive be...
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COMPONENT LOCATION DIAGRAMS FOR 2008 Audi S4 AUTOMOBILES
Component location diagrams for most 2008 Audi S4 cars and light trucks sold in the U.S. from 1990+.
Communication Components Diagram for 2008 Audi S4 Avant 4.2 V8 GAS Components on diagram: |
Parking Aid Components Diagram for 2008 Audi S4 Cabriolet 4.2 V8 GAS Components on diagram: |
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WIRING DIAGRAMS FOR 2008 Audi S4 AUTOMOBILES
OEM drawn wiring diagrams for most 2008 Audi S4 cars and light trucks sold in the U.S.
2008 Audi S4 Avant 4.2 V8 GAS Wiring Diagram Components on diagram: |
2008 Audi S4 Cabriolet 4.2 V8 GAS Wiring Diagram Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2008 Audi S4 AUTOMOBILES
OEM TSB listings for most 2008 Audi S4 cars and light trucks sold in the U.S. from 1985+.
Document: NAVIGATION PLUS (RNS-E) DVD READ ERROR - REVISED Vehicle: 2008 Audi S4 4.2 V8 GAS Auto Systems: |
Document: AUDI TIRE PRESSURE MONITORING SYSTEMS OVERVIEW - REVISED Vehicle: 2008 Audi S4 4.2 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2008 Audi S4 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2008 Audi S4 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 2008 Audi S4 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 2008 Audi S4 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 2008 Audi S4 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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