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
Only bulletins with component: Engine are shown. Show all
| No. 14-23 | 2023-08-04. Service bulletin. ENGINE AND ENGINE COOLING. Manufacturers certificate for allocation of approved engine oils |
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| No. 2000 | 2020-11-06. Service bulletin. ENGINE AND ENGINE COOLING. Advanced Technical information on a NVH Lubrication kit. |
| 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! |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.