Porsche 911 2019–2021 — service campaign

Bulletin No. WSB4 · NHTSA communication 11025122 · issued Oct 17, 2025

Service campaign

communication type

Electrical System

component

2019–2021

model years

vehicle entries

Official summary

Technical information for WSB4 - Re-Programming External Communication Control Unit (Workshop Campaign)

Vehicles covered

2019 Porsche 911
2020 Porsche 911
2021 Porsche 911
2020 Porsche 911 Carrera
2021 Porsche 911 Carrera
2019 Porsche 911 Carrera S
2020 Porsche 911 Carrera S
2021 Porsche 911 Carrera S
2019 Porsche 911 GT2
2019 Porsche 911 GT2 RS
2019 Porsche 911 GT3
2021 Porsche 911 GT3
2019 Porsche 911 GT3 RS
2019 Porsche 911 Targa 4
2020 Porsche 911 Targa 4
2021 Porsche 911 Targa 4
2019 Porsche 911 Turbo
2020 Porsche 911 Turbo
2021 Porsche 911 Turbo
2021 Porsche 911 Turbo S
2019 Porsche Cayenne
2020 Porsche Cayenne
2021 Porsche Cayenne
2019 Porsche Cayenne E-Hybrid
2020 Porsche Cayenne E-Hybrid
2021 Porsche Cayenne E-Hybrid
2020 Porsche Cayenne GT
2021 Porsche Cayenne GT
2021 Porsche Cayenne GTS
2019 Porsche Cayenne S
2020 Porsche Cayenne S
2021 Porsche Cayenne S
2020 Porsche Cayenne S E-Hybrid
2019 Porsche Cayenne Turbo
2020 Porsche Cayenne Turbo
2020 Porsche Cayenne Turbo Coupe
2019 Porsche Cayenne Turbo S E-Hybrid
2020 Porsche Cayenne Turbo S E-Hybrid
2021 Porsche Cayenne Turbo S E-Hybrid
2020 Porsche Cayenne Turbo S Hyb Coupe

What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.