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Service bulletins for the 1981 Porsche 928

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

57 on file from NHTSA, as of 2026-10-19.

By type

By component

Bulletins, newest first
PIWIS2301k2023-03-04. Service bulletin. EQUIPMENT. Information for PIWIS tester update 41.750.045 & .046
No. 23032023-03-04. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. Special tools information for the pneumatic cartridge gun.
No. 22342023-01-10. Service bulletin. ELECTRICAL SYSTEM. Instructions on advanced technical information for improper odometer and speedometer function
No. 17D4a2023-01-10. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. The following illustrations are based on the four poster set "Evolution Porsche 1948-2006".
No. 1758.42022-12-07. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. Special tools information for the logo templates and exchangeable inserts.
PIWIS2202b2022-12-07. Service bulletin. EQUIPMENT. Information for PIWIS tester update 41.500.020 & .022
PIWIS2201au2022-10-05. Service bulletin. EQUIPMENT. Information for PIWIS tester update 41.400.000 & .010.
PIWIS2201at2022-10-05. Service bulletin. EQUIPMENT. Information for PIWIS tester update #41.375.050
PIWIS2201as2022-10-05. Service bulletin. EQUIPMENT. Information for PIWIS tester update #41.375.045.
No. D6152022-10-05. Service bulletin. EQUIPMENT; FUEL SYSTEM, GASOLINE. Parts information for parts withdrawal involving the fuel filler flap
PIWIS2201ar2022-10-05. Service bulletin. EQUIPMENT. Information for PIWIS tester update #41.375.040
No. 1804.12022-09-08. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. Instructions on advanced technical information for the lubricant for the sunroof/sliding roof.
PIWIS2201an2022-09-08. Service bulletin. EQUIPMENT. Information for PIWIS tester update #41.300.000, .010 & .012
No. 1801.42022-04-05. Service bulletin. SERVICE BRAKES. Advanced technical information for a brake squeal.
No. 73-202021-08-04. Service bulletin. WHEELS; TIRES. List of approved wheels, tires, and spacers for the 928 model, from Model Years 1978 to 1995.
No. D13.22021-07-06. Service bulletin. EQUIPMENT. Information on new PIWIS Tester program for independent repair facilities.
ATIALL416052021-06-28. Service bulletin. EQUIPMENT; SERVICE BRAKES. Understanding and addressing brake squeal complaints.
No. 52-212021-05-05. Service bulletin. ELECTRICAL SYSTEM. Information on how to deal with a potential cyber security breach.
No. D4a2021-04-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Historical information on Porsche product evolution.
PIWIS2102j2021-04-02. Service bulletin. EQUIPMENT. Information on PIWIS Tester update 40.000.020 & .022.
No. 20002020-11-06. Service bulletin. ENGINE AND ENGINE COOLING. Advanced Technical information on a NVH Lubrication kit.
Charging lockup2020-07-02. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Info on a new customer tool for looking up campaigns and recalls on their vehicle.
No. D4a2020-07-02. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Document showing the evolution of Porsche Vehicles since 1948.
PIWIS2001v2020-07-02. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. Information on new PIWIS tester update 39.500.020 and .025.
122-N3Z8S-042020-04-02. Service bulletin. VISIBILITY. Technical information for replacing the air conditioning compressor on the 930 generation 911 Turbo.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.