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Service bulletin No. 166-21-2

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 id10249919
Published by NHTSA2024-02-08
Manufacturer's numberNo. 166-21-2
Manufacturer's date2024-01-30
NHTSA componentEQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:PIPES, HOSES, AND FITTINGS; ENGINE AND ENGINE COOLING; EQUIPMENT

NHTSA's summary

Technical information for Oil Leakage on Cylinder Head Cover: Insert Micro-Self-Locking Screw

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, Equipment and accessories, Labels and manuals, Engine oil and lubrication

Vehicles listed
PORSCHE PANAMERA2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024

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. 55-222023-10-05. Service bulletin. Manufacturers certificate for an allocation of approved engine oils from MY24.
No. 22-232023-10-05. Service bulletin. Manufacturers certificate for an overview of approved Porsche C40 engine oils.
No. 21-232023-10-05. Service bulletin. Manufacturers certificate for an overview of approved Porsche C30 engine oils.
No. 20-232023-10-05. Service bulletin. Manufacturers certificate for an overview of approved Porsche C20 engine oils.
No. 19-232023-10-05. Service bulletin. Manufacturers certificate for an overview of approved Porsche A40 engine oils.
No. 18-232023-10-05. Service bulletin. Manufacturers certificate for an overview of approved Porsche C40 engine oils.
No. 17-232023-10-05. Service bulletin. Manufacturers certificate for an overview of approved Porsche C30 engine oils.
No. 16-232023-10-05. Service bulletin. Manufacturers certificate for an overview of approved Porsche C20 engine oils.
No. D6472023-09-09. Service bulletin. Parts information on parts withdrawal for the oil pump
No. 12-222022-10-05. Service bulletin. Instructions on manufacturers certificate for allocation of approved engine oils.