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Service bulletins for the 1997 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.

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

By type

By component

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
No. 03-212021-04-02. Service bulletin. ENGINE AND ENGINE COOLING. List of approved C20 engine oils for all new and classic Porsche models 1984 and newer.
No. 54-202021-01-05. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. List of approved A40 style engine oils for new and classic Porsche models.
No. 53-202021-01-05. Service bulletin. ENGINE AND ENGINE COOLING. List of approved C40 style engine oils for new and classic Porsche vehicles.
No. 20002020-11-06. Service bulletin. ENGINE AND ENGINE COOLING. Advanced Technical information on a NVH Lubrication kit.
No. 33-202020-10-01. Service bulletin. ENGINE AND ENGINE COOLING. Overview of Approved Porsche C20 Engine Oils
No. 3-202020-10-01. Service bulletin. ENGINE AND ENGINE COOLING. Information on Classic 993 generation 911 crankcases.
No. 16-202020-06-01. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. List of approved A40 engine oils for all applicable vehicles as of 1984.
122-M8J3B-052020-05-04. Service bulletin. ENGINE AND ENGINE COOLING. List of approved C40 engine oils for all Porsche models since 1984.
122-F4J4K-042020-04-02. Service bulletin. ENGINE AND ENGINE COOLING. List of approved engine oils for all Porsche models.
122-M2T3L-092018-11-19. Service bulletin. ENGINE AND ENGINE COOLING. Subject: Cleaning cooling system. Information: Engine oil in cooling system (coolant warning light comes on).
1010052005-12-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. HANDLING PTFE CRANKSHAFT SEALS. 8JB
13592005-12-14. Service bulletin. ENGINE AND ENGINE COOLING. INSTALLING PTFE (POLYTETRAFLUOROETHYLENE) CRANKSHAFT SEALS ON REPLACEMENT ENGINES. *TT
02042004-12-10. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SECONDARY OIL FILTER BLEED BACK. P/N - 993 107 203 03. *TT
26352000-04-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. INSTALLATION OF DUAL TAILPIPE. YD

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