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
| 122-Z3C2E-10 | 2019-10-15. Service bulletin. ELECTRICAL SYSTEM. Announcement of new Tech Live look, which will put technicians into live chats with technical support if they should have an urgent issue |
|---|---|
| 122-L8R6J-10 | 2019-10-15. Service bulletin. ELECTRICAL SYSTEM. Bulletin highlighting new updates 38.750, 38.750.000 for the Porsche PIWIS Tester 3 |
| 122-Z6Y7L-09 | 2019-09-23. Service bulletin. ELECTRICAL SYSTEM. Bulletin outlining PIWIS Tester updates 38.600.030 & 035. |
| 122-E4R8U-09 | 2019-09-23. Service bulletin. ELECTRICAL SYSTEM. Bulletin outlining PIWIS Tester updates 38.600.020. |
| 122-B3Y6H-09 | 2019-09-23. Service bulletin. ELECTRICAL SYSTEM. Bulletin outlining PIWIS Tester updates 38.600.000, .010, & .015. |
| 122-E5S5K-03 | 2018-03-13. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. Replacing air-conditioning compressor during repairs. If a faulty air-conditioning compressor needs to be replaced, an air-conditioning compressor of similar design is available. The fastening points are not the same as on the standard air-conditioning compressor. The high-pressure and low-pressure lines must be changed! |
| PK-D8-16 | 2011-06-20. Service bulletin. UNKNOWN OR OTHER. PORSCHE: INFORMATION ON HOW TO READ THE VIN. *RM |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.