Service bulletins for the 1990 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.
81 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Tires are shown. Show all
| No. 73-20 | 2021-08-04. Service bulletin. WHEELS; TIRES. List of approved wheels, tires, and spacers for the 928 model, from Model Years 1978 to 1995. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.