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Service bulletin 122-U8S4N-05

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 id10117424
Published by NHTSA2017-09-14
Manufacturer's number122-U8S4N-05
Manufacturer's date2015-07-08
NHTSA componentELECTRICAL SYSTEM:12V/24V/48V BATTERY

NHTSA's summary

Concerns: 'High-voltage battery' control unit Information: In the event of spare parts requirements for * 'High-voltage battery' control unit * High-voltage battery the software version must be checked after installing these components.

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 PANAMERA S E-HYBRID2014, 2015 (the catalog's model; the bulletin names a series or trim of it)

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. 17-202020-10-01. Service bulletin. Service campaign information on Porsche Workshop Campaign WKK5 Workshop campaign - Re-programming air conditioning and high-voltage battery control units.
No. 139-202020-10-01. Service bulletin. Information on replacing the HV battery on the Panamera S E Hybrid.
122-Z6W8C-072017-10-27. Service bulletin. Subject: Discharge protection function of the batterymanagement system(BMS) in order to extend the service life of high-voltage and low-voltage batteries
122-X3Y7Q-072017-10-27. Service bulletin. Concerns: AGM starter battery (referred to below simply as 'battery') Situation: Support for the care andmaintenance of the AGMstarter battery (at the dealership): From the time the vehicle is delivered to the Porsche Centre until it is handed over to the customer, the battery must be maintained and charged regularly, depending on use.
122-R8X7Z-072017-10-27. Service bulletin. Customer complaints concerning battery-related topics Recurring customer complaints concerning topics relating to battery capacity and quality.
122-B7U4T-052017-10-15. Service bulletin. Customer Concern: Certain vehicle systems have unwanted, unpredictable behavior. Technical Concern: The symptoms are difficult to diagnose. There may be multiple symptoms intermittently affecting multiple systems. Though this is not an exhaustive list, some common failure modes are: ? Start/stop issues ? Power windows not fully returning to the parked position after automatic preopening ? PCM audio stopping during a start/stop cycle Ultimately, the technician determines that low 12-volt battery voltage is the underlying root cause of the unwanted behavior. The technician corrects the battery?s low voltage. Consequently, the unwanted behavior ends.
122-W8J3S-092017-09-14. Service bulletin. Technical Concern: Porsche designs plug-in hybrid vehicles to protect the health of the high voltage battery. One way the vehicle does this is by disabling high electrical load features when the high voltage battery has a low state of charge.
122-U5S5J-092017-09-14. Service bulletin. Information: During the packaging of a High Voltage Lithium Ion battery, copies of The test log for classification of lithium-ion high voltage batteries (located in PIWIS - Standard Forms) must be attached inside the box and to the document bag on the exterior of the box as per the Workshop Manual 2X00IN Packing non-critical high-voltage battery (970, 971, 92A) or Workshop Manual 2708IN Packaging instructions for high-voltage battery (918)
122-L7N8T-062017-09-14. Service bulletin. Concerns: High-voltage battery control unit Information: This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles. The errormessage "Hybrid system failure - Park vehicle safely" can appear sporadically in the instrument cluster on the affected vehicles because the high-voltage system diagnostic function is too sensitive.
122-J6D9Z-052017-09-14. Service bulletin. Concerns: Replacing cover for high-voltage battery vent line Information: This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles. Vent line covers that do not comply with the latest standards may have been installed on the affected vehicles.