Technical Service Bulletin New Alternator Has Integrated Regulator 

Subject: New Alternator has Integrated Regulator  Models: 911 1982

Bulletin Number: 82 – 02

A new-type alternator, Part No. 911.603.120.04, with an integrated regulator, is now installed instead of the former version, Part No. 911.603.120.02, which used a separate regulator. The regulator on the new version, Part No. 911.603.913.01 is located on the back of the alternator and can be replaced separately. Mounting bolts on the alternator and can be replaced separately. The threads on the alternator shaft for installation of the pulley have also been changed from M 16 x 1 to M 17 X 1.5.

The hub extension (air guide) has been modified to provide an opening for the regulator. The battery charge indicator lamp is changed from 2 W to 4 W, and the DF wire was removed from the engine wire harness.


These changes were effective with 1982 model production.

old and new alternator parts


Only new-type alternator will be available for replacement after existing stocks of old version are used up

New Alternator, installing (cars prior to 1982 models)

Parts required

Fig. No.                Description        Part Number

1                              Alternator           911.603.120.04

2                              Hub extension  911.106.033.05

3                              Clamping cap     911.603.428.01

4                              Plug distr. (2 reg.)            11.971.511

5                              Resistor                911.641.981.00

Work procedure:

  • Disconnect battery
  • Remove old alternator
  • Remove old hub extension
  • Cut off DF wire (black) at wire branch
  • Remove alternator regulator
  • Fasten multiple-pin plug of the removed regulator on wire harness
  • Install new alternator in the blower housing
  • Push new hub extension onto wire harness and connect the alternator
    • B+ =red wire
    • D- =brown wires/ground (2 req.)
    • 61 =blue wire
  • Mount  extension on the alternator and install blower housing
  • Tighten drive belt as specified
  • If applicable, install the air conditioner compressor and drive belt
  • Reconnect battery


If the battery charge indicator lamp does not go out after starting the engine, the exciter current is too weak because of the 2-watt lamp. In this case, supplied resistor (911.641.981.00/91 ohms, 5 W) must be installed parallel to the battery charge indicator lamp Resistor, installing

  • Remove instrument cluster and take out battery charge indicator lamp socket.
  • Install both piggyback connectors (111.971.511) on bulb socket and solder resistor on outer flat male terminals as shown.
  • Connect bulb socket again and install instrument cluster
  • Recheck battery charge indicator lamp operation and, after running engine briefly, tightness of drive belt

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