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Service bulletin No. 178-22

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 id10227312
Published by NHTSA2022-12-07
Manufacturer's numberNo. 178-22
Manufacturer's date2022-11-07
NHTSA componentELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM

NHTSA's summary

Technical information for WNN3 - re-programming connect control unit.

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

Electrical system, 12-volt battery

Vehicles listed
PORSCHE 9112020, 2021, 2022

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. 2229.112024-03-05. Service bulletin. Instructions on advanced technical information for the Cayenne and 911 - conbox current draw discharges 12v battery
No. 31-202024-03-04. Service bulletin. Technical information for a diagnosis and handling of 12 volt lithium ion battery
No. 2229.92023-09-09. Service bulletin. Information on advanced technical information for the Cayenne and 911 - conbox current draw discharges 12v battery
No. 2229.42022-12-07. Service bulletin. Instructions on advanced technical information for the conbox current draw discharges 12v battery - for the Cayenne and 911.
No. 2109.12022-01-04. Service bulletin. Instructions on advanced technical information for critical 12V Li-ion battery recycling for the 911, Cayenne, Taycan, and 918 Spyder.
122-F6B5X-102019-10-15. Service bulletin. Instructions for checking for appropriate labels on the Li-Ion battery in the new 911