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Service bulletin No. 34-23

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10246386
Published by NHTSA2023-12-07
Manufacturer's numberNo. 34-23
Manufacturer's date2023-11-14
NHTSA componentEQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

NHTSA's summary

Instructions on manufactures certificate for approved Porsche C40 engine oils

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Equipment and accessories, Labels and manuals

Vehicles listed
PORSCHE 7182017
PORSCHE 718 BOXSTER2017, 2018, 2019, 2020
PORSCHE 718 BOXSTER S2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 718 CAYMAN2017, 2018, 2019, 2020
PORSCHE 718 CAYMAN S2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 718 SPYDER2018 to 2019
PORSCHE 718 SPYDER2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
No. 147-182024-02-08. Service bulletin. Technical information for the complaint - rattling noise from around the crank drive
PIWIS2302s2023-12-08. Service bulletin. Information for PIWIS tester update 42.300.050 & .052
No. 35-232023-12-07. Service bulletin. Instructions on manufactures certificate for approved Porsche A40 engine oils
No. 33-232023-12-07. Service bulletin. Instructions on manufactures certificate for approved Porsche C30 engine oils
No. 32-232023-12-07. Service bulletin. Instructions on manufacturers certificate for approved C20 engine oils
No. 19-212023-12-07. Service bulletin. Installation and conversion instructions for the GT3 RS
PIWIS2302r2023-12-07. Service bulletin. Information for PIWIS tester update 42.300.040 & .041
PIWIS2302q2023-12-07. Service bulletin. Information for PIWIS tester update 42.300.035
PIWIS2302p2023-12-07. Service bulletin. Information for PIWIS tester update 42.300.030 - .032
No. D6542023-12-07. Service bulletin. Parts information for parts withdrawal involving the glass roof - 9J0877069EY and 9J0877069DY