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Service bulletin No. 91-24-2

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 id11005756
Published by NHTSA2024-08-06
Manufacturer's numberNo. 91-24-2
Manufacturer's date2024-07-08
NHTSA componentENGINE

NHTSA's summary

Technical information for an oil leakage in the area of the supper part of the oil pan and crankcase: checking return seal on upper part of oil pan and replacing if necessary

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

Engine

Vehicles listed
PORSCHE 718 BOXSTER GTS2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 718 CAYMAN GT42022 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 718 CAYMAN GTS2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 718 SPYDER2020
PORSCHE 718 SPYDER2021
PORSCHE 718 SPYDER2022, 2023
PORSCHE CAYMAN GT42020 to 2021
PORSCHE CAYMAN GTS2021
PORSCHE redundant CAYMAN GT42023

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. 87-262026-10-02. Service bulletin. Technical Information for Rattling Noises from Around the Rear Silencer
No. 32-262026-10-02. Service bulletin. Manufacturer's Certificate for Overview of approved Porsche C40 GT engine oils
No. 31-262026-10-02. Service bulletin. Manufacturer's Certificate for Overview of Approved Porsche C40 Engine Oils
No. 30-262026-10-02. Service bulletin. Manufacturer's Certificate for Overview of Approved Porsche C20 Engine Oils
No. 29-262026-10-02. Service bulletin. Manufacturer's Certificate for Overview of Approved Porsche C30 Engine Oils
No. 28-262026-10-02. Service bulletin. Manufacturer's Certificate for Overview of Approved Porsche C40 Engine Oils. Note that this bulletin covers all models back to model year 1984, for which C40 engine oils are allocated.
No. 27-262026-10-02. Service bulletin. Manufacturer's Certificate for Overview of Approved Porsche C20 Engine Oils. Note that the bulletin covers all models back to model year 1984, for which C20 engine oils are allocated.
No. 26-262026-10-02. Service bulletin. Manufacturer's Certificate for Overview of Approved Porsche C30 Engine Oils. Note that the bulletin includes all models back to model year 1984, for which C30 engine oils are allocated.
No. 25-262026-10-02. Service bulletin. Manufacturer's Certificate for Overview of Approved Porsche A40 Engine Oils. Note that this bulletin covers all vehicles from model year 1997 to 2020, for which A40 engine oils are assigned. Model years 1997-2001 are not available for selection in the system.
No. 36-262026-10-02. Service bulletin. Manufacturer's Certificate for Overview of Approved Porsche C40 Engine Oils