TSB: WSH4 - Updated software available for the HV battery control unit (BMCe) - July 8, 2025

[Tooney]

[Note preconditions for OTA update are listed in the TSB.]

https://static.nhtsa.gov/odi/tsbs/2025/MC-11021354-0001.pdf

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[Genau]

Got it last week. Thanks for the additional details.

 

[Tooney]

Got it last week. Thanks for the additional details.

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Was your car included in ARB6 or ARB7 recall?

 

[Genau]

Was your car included in ARB6 or ARB7 recall?

Neither, as far as I can tell from the vehicle history (provided by @ct14garage) and the notices from Porsche North America. My HV battery failed and was replaced (entire assembly) in December 2023.

 

[Tooney]

Neither, as far as I can tell from the vehicle history (provided by @ct14garage) and the notices from Porsche North America. My HV battery failed and was replaced (entire assembly) in December 2023.

that must be why you got the update as WSH4.

 

[Sarup]

Regards

Erik

 

[Genau]

Regards
Erik

Ahhh, makes sense now:
The vehicles affected by this campaign were built or repaired using a high-voltage battery that was manufactured after the date of use ("clean date") of the optimized high-voltage batteries. Therefore, these vehicles are not covered by the recall campaigns ARB6 or ARB7.

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