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Service bulletins for the 1988 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.

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

By type

By component

Bulletins, newest first
PIWIS2001v2020-07-02. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. Information on new PIWIS tester update 39.500.020 and .025.
122-J4L4X-032020-03-05. Service bulletin. EQUIPMENT. Bulletin outlining new blitz table replacement castors due to a high rate of failure reported by dealers.
122-Z2X7A-022020-02-04. Service bulletin. ENGINE AND ENGINE COOLING. List of approved C20 engine oils for all Porsche vehicles since 1984.
122-Z3C2E-102019-10-15. 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-102019-10-15. Service bulletin. ELECTRICAL SYSTEM. Bulletin highlighting new updates 38.750, 38.750.000 for the Porsche PIWIS Tester 3
122-Z6Y7L-092019-09-23. Service bulletin. ELECTRICAL SYSTEM. Bulletin outlining PIWIS Tester updates 38.600.030 & 035.
122-E4R8U-092019-09-23. Service bulletin. ELECTRICAL SYSTEM. Bulletin outlining PIWIS Tester updates 38.600.020.
122-B3Y6H-092019-09-23. Service bulletin. ELECTRICAL SYSTEM. Bulletin outlining PIWIS Tester updates 38.600.000, .010, & .015.
122-G7K8V-022018-02-12. 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!
PK-D8-162011-06-20. 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.