Service bulletins for the 1984 Porsche 911
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.
90 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Engine are shown. Show all
| 122-J8E6Y-04 | 2020-04-01. Service bulletin. ENGINE AND ENGINE COOLING. List of approved C40 engine oils for all Porsche vehicles for which C40 is allocated. |
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| 122-Z2X7A-02 | 2020-02-04. Service bulletin. ENGINE AND ENGINE COOLING. List of approved C20 engine oils for all Porsche vehicles since 1984. |
| 122-G7K8V-02 | 2018-02-12. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; ENGINE AND ENGINE COOLING. Concern: Replacing air-conditioning compressor during repairs Notes: If a faulty air-conditioning compressor (? Figure 1) for the 911 needs to be replaced, an air-conditioning compressor of similar design is available. The new air-conditioning compressor must ONLY be used with the new V-belt. Please remember this when ordering parts! All connections and fastening points are the same as on the standard air-conditioning compressor. There is no need to change the high-pressure/low-pressure lines! |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.