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Service bulletin No. 72-26

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 id11037830
Published by NHTSA2026-10-02
Manufacturer's numberNo. 72-26
Manufacturer's date2026-09-23
NHTSA componentENGINE; POWER TRAIN

NHTSA's summary

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.

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, Transmission and driveline

Vehicles listed
PORSCHE 9112025, 2026

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)
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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. 32-262026-10-02. Service bulletin. Manufacturer's Certificate for Overview of approved Porsche C40 GT engine oils
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No. 29-262026-10-02. Service bulletin. Manufacturer's Certificate for Overview of Approved Porsche C30 Engine Oils
No. 36-262026-10-02. Service bulletin. Manufacturer's Certificate for Overview of Approved Porsche C40 Engine Oils
13/262026-08-06. Service bulletin. Allocation of Approved Engine Oils MY 2027 (13/26)