Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI1998A8 SEDAN (4D2) V8-3.7L (AEW)REPAIR AND DIAGNOSISSTARTING AND CHARGINGCHARGING SYSTEMALTERNATORSERVICE AND REPAIR
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)
Alternator: Service and Repair
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)SECTION Service and Repair
Generator, Removing and Installing
CAUTION!
Before working on the electrical system:
- Determine the correct coding for the anti-theft radio.
- Disconnect the battery Ground (GND) strap.
NOTE:
- Before disconnecting the battery, obtain radio anti-theft code.
- After reconnecting the battery be sure to reactivate the radio, clock, power windows and engine.
Work sequence
- Remove noise insulation -arrows-.
- Remove intake hose from generator.
- Disconnect wiring for terminal 30 (B +)- -1- at generator.
Tightening torque: 16 Nm (12 ft lb)
- Disconnect terminal D+ -2-.
Tightening torque: 4 Nm (35 in. lb)
- Release tension for ribbed belt by pulling belt by hand down and inserting 3204 drift.
- Remove ribbed belt from generator..
NOTE: Mark running direction of belt. Running the belt in reverse can damage it.
- Remove bolts -1-, tightening torque 45 Nm (33 ft lb).
- To better reach rear bolt -1-, remove air cleaner and remove bolt from above.
- Remove bolt -2-, tightening torque 20 Nm (15 ft lb).
- Remove generator -4- down and then out of the engine compartment.
Installing:
- Install generator in reverse order of removal.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.