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Service bulletin No 223-24

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 id11015085
Published by NHTSA2025-03-05
Manufacturer's numberNo 223-24
Manufacturer's date2025-01-07
NHTSA componentENGINE

NHTSA's summary

Symptom-based workshop manual - Assessment of Oxidized Cylinder Liners (SY 223/24)

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 BOXSTER2017, 2018, 2019, 2020, 2021, 2022, 2023
PORSCHE 718 BOXSTER2025
PORSCHE 718 CAYMAN2017, 2018, 2019, 2020, 2021
PORSCHE 718 CAYMAN2023
PORSCHE 718 CAYMAN2026
PORSCHE 911 CARRERA2017 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA2020, 2021, 2022, 2023, 2024, 2025 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE redundant CAYMAN2022

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
WSM52026-10-02. Service campaign. Porsche intranet posting for Campaign WSM5 – Replacing engine data sticker (VECI)
No. WSM52026-10-02. Service campaign. Technical Information for Campaign WSM5 – Replacing engine data sticker (VECI)
No. 91-262026-10-02. Service bulletin. Technical Information for Particles/Metal Chips/Residues in Engine Oil
SY No. 72-262026-10-02. Service bulletin. Symptom-based workshop manual for High-Pitched “Whining” and Whistling Noises in Partial Load Operation from the Engine Area. Note that this bulletin only covers 911 Turbo S with the t-hybrid system.
No. 72-262026-10-02. Service bulletin. Symptom-based workshop manual for High-Pitched “Whining” and Whistling Noises in Partial Load Operation from the Engine Area. Note that this bulletin covers only 911 GTS t-hybrid models.
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.