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

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

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.