# Service bulletins for the 1993 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.

80 bulletins from NHTSA, as of 2026-10-19.

- [PIWIS2302s](/bulletins/10246417.md), 2023-12-08, Service bulletin: EQUIPMENT. Information for PIWIS tester update 42.300.050 \& .052
- [No. 35\-23](/bulletins/10246387.md), 2023-12-07, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Instructions on manufactures certificate for approved Porsche A40 engine oils
- [No. 33\-23](/bulletins/10246385.md), 2023-12-07, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Instructions on manufactures certificate for approved Porsche C30 engine oils
- [No. 32\-23](/bulletins/10246384.md), 2023-12-07, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Instructions on manufacturers certificate for approved C20 engine oils
- [PIWIS2302r](/bulletins/10246374.md), 2023-12-07, Service bulletin: EQUIPMENT. Information for PIWIS tester update 42.300.040 \& .041
- [PIWIS2302q](/bulletins/10246372.md), 2023-12-07, Service bulletin: EQUIPMENT. Information for PIWIS tester update 42.300.035
- [PIWIS2302p](/bulletins/10246369.md), 2023-12-07, Service bulletin: EQUIPMENT. Information for PIWIS tester update 42.300.030 \- .032
- [No. D654](/bulletins/10246366.md), 2023-12-07, Service bulletin: EQUIPMENT. Parts information for parts withdrawal involving the glass roof \- 9J0877069EY and 9J0877069DY
- [PIWIS2302h](/bulletins/10244982.md), 2023-11-07, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Special tools and equipment information on PIWIS tester update 42.250.050
- [PIWIS2302g](/bulletins/10243631.md), 2023-10-05, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Information on PIWIS tester update 42.250.045
- [PIWIS2302f](/bulletins/10243630.md), 2023-10-05, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Information on PIWIS tester update 42.250.042
- [PIWIS2302e](/bulletins/10243625.md), 2023-10-05, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Information PIWIS tester update 42.250.040
- [PIWIS2302d](/bulletins/10243617.md), 2023-10-05, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Information on PIWIS tester update 42.250.032
- [PIWIS2302C](/bulletins/10243616.md), 2023-10-05, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Information on PIWIS tester update 42.250.030
- [PIWIS2302b](/bulletins/10243615.md), 2023-10-05, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Information on PIWIS tester update 42.200.025
- [PIWIS2302a](/bulletins/10243598.md), 2023-10-05, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Information on PIWIS tester update 42.200.020 \& .022
- [No. 2314](/bulletins/10243597.md), 2023-10-05, Service bulletin: ELECTRICAL SYSTEM. Special tools and equipment information for all Porsche models. Diagnostic equipment standards.
- [No. 19\-23](/bulletins/10243588.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche A40 engine oils.
- [No. 18\-23](/bulletins/10243587.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche C40 engine oils.
- [No. 17\-23](/bulletins/10243586.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche C30 engine oils.
- [No. 16\-23](/bulletins/10243585.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche C20 engine oils.
- [PIWIS2301az](/bulletins/10243576.md), 2023-10-05, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Information on PIWIS tester update 42.200.000 – 42.200.012
- [No. 2313](/bulletins/10243573.md), 2023-10-05, Service bulletin: ELECTRICAL SYSTEM. Special tools and equipment information for the Pico Oscilloscope Extended Functionality
- [No. D5](/bulletins/10242140.md), 2023-09-09, Service bulletin: EQUIPMENT; EQUIPMENT:ELECTRICAL:ANTI\-THEFT DEVICES. Parts information for parts withdrawal on the locks made to original key code
- [No. 14\-23](/bulletins/10240439.md), 2023-08-04, Service bulletin: ENGINE AND ENGINE COOLING. Manufacturers certificate for allocation of approved engine oils

More: [the next page](/v1/vehicles/1993_porsche_928/bulletins?cursor=2023-08-04_10240439) (JSON)

JSON: [/v1/vehicles/1993_porsche_928/bulletins](/v1/vehicles/1993_porsche_928/bulletins)

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