Subject: Improved Window Regulator Stop Models: 911 Targa / 911 Cabriolet 1980-1985
Bulletin Number: 86 – 09
The window regulator was improved to prevent the upper stop from moving, causing the door window to go out of adjustment.
From Production Date: Sept. 30, 1985
VIN 91 0GS 12 0566
91 5GS 16 0403
91 9GS 17 0240
93 7GS 05 0243
The locking of the regulator stop on Targa and Cabriolet models from 1980 to September 30. 1985 can be improved by installing an additional bolt and nut on the upper stop.
See picture
- Targa Model 1980-1983

Cabriolet Model 1983
- Targa and Cabriolet
Model 1984 – Sept. 30, 1985M
Modification can be done with regulator installed.
Parts required:
Bolt M6x6 Part Number 900.075.007.02
Nut 6mm Part Number 900.910.012.02
Do not use washers
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